What this calculator does

A feet and inches calculator is built for mixed length measurements such as 5 ft 10 in, 2 ft 3 1/2 in, or 11 ft 7 3/16 in. These measurements are common in construction, carpentry, interior design, architecture, tailoring, height records, furniture sizing, classroom measurement, home improvement, machining, landscaping, and product dimensions. The challenge is that feet and inches use a base-12 relationship, while most arithmetic and decimal calculators use base 10. This tool bridges that gap.

The calculator converts mixed feet and inches into total inches, performs the selected operation, and then converts the answer back into a normalized format. Normalized means the inches portion is kept below 12. For example, 4 ft 15 in becomes 5 ft 3 in because 12 of those inches form another foot. The same rule applies after addition, subtraction, multiplication, or division.

The tool also gives decimal feet and metric equivalents. Decimal feet are useful when a plan, quantity worksheet, or material estimate expects one number. Metric values are useful when dimensions need to be shared with someone using centimeters, millimeters, or meters. If you need only a single-purpose conversion, RevisionTown also has dedicated tools such as the feet and inches to centimeters converter, the feet and inches to millimeters converter, and the feet and inches to inches calculator.

This page is different from a height-only tool. A height converter is useful when the main task is converting personal height between systems. This calculator is broader: it is for length arithmetic. It can add two board lengths, subtract an opening from a wall, multiply a cut length by a repeated count, divide a total span into equal parts, and convert the result into the unit needed for the next step.

Feet and inches formulas

The relationship between feet and inches is exact:

To convert a mixed feet-and-inches value into total inches, multiply feet by 12 and add the inches:

Here \(f\) is the number of feet and \(i\) is the number of inches. If there is a fractional inch, include it inside \(i\). For example, \(3\frac{1}{2}\) inches becomes \(3.5\) inches for the calculation.

To convert total inches back to feet and inches, divide by 12. The whole-number quotient gives feet, and the remainder gives inches:

Decimal feet are calculated by dividing total inches by 12:

Metric conversion uses the exact relationship \(1\text{ in} = 2.54\text{ cm}\). From that, \(1\text{ ft} = 30.48\text{ cm}\), \(1\text{ in} = 25.4\text{ mm}\), and \(1\text{ in} = 0.0254\text{ m}\):

For adding and subtracting, convert both values to inches, perform the operation, and normalize the answer:

For multiplying by a scalar \(k\), multiply the total inches by \(k\). For dividing by a scalar \(k\), divide the total inches by \(k\), with \(k\neq 0\):

The calculator uses these formulas because total inches are the simplest common base for ft-in arithmetic. Once the result is known in inches, it can be displayed in any useful format.

Worked examples

These examples show how feet and inches arithmetic works step by step. The calculator performs the same process automatically, but seeing the method helps you check your work manually.

Example 1: Add two measurements

Add 5 ft 10 in and 2 ft 3 in.

The answer is 8 ft 1 in. In decimal feet, \(97/12 \approx 8.0833\) ft. In centimeters, \(97\times 2.54 = 246.38\) cm.

Example 2: Subtract an opening from a span

A wall section is 12 ft 4 in long. A built-in opening is 3 ft 9 in wide. The remaining length is:

This is a typical construction and interior layout calculation. The arithmetic is easier after both dimensions are converted to total inches.

Example 3: Multiply a cut length

A shelf support is 1 ft 7 1/2 in long and you need 6 identical pieces.

The total material length before waste is 9 ft 9 in. If the material needs trimming or saw kerf allowance, add that separately after calculating the clean length.

Example 4: Divide a span into equal sections

A board is 7 ft 6 in long and needs to be divided into 5 equal parts.

Each section is 1 ft 6 in. If the cuts remove material, subtract the total saw kerf before dividing when exact finished piece length matters.

Example 5: Convert to metric

Convert 6 ft 2 in to centimeters and meters.

This kind of conversion is useful for height, furniture dimensions, product specifications, and international drawings. For height-only conversions, the height converter may be more direct.

Working with fractional inches

Feet and inches often use fractional inches rather than decimal inches. A carpenter might write 2 ft 4 3/8 in, a cabinet drawing might call for 11 7/16 in, and a product specification might list 5 ft 2 1/2 in. The calculator accepts an optional fractional inch selector so these values can be entered without converting the fraction manually.

Fractions are still numbers. The fraction \(1/2\) equals 0.5 in, \(1/4\) equals 0.25 in, \(1/8\) equals 0.125 in, and \(1/16\) equals 0.0625 in. When the calculator adds a fraction, it adds the decimal equivalent to the inches portion before converting the entire measurement into total inches.

After calculation, a result can be shown as a decimal inch or rounded to a common fraction. The calculator lets you choose the nearest \(1/4\), \(1/8\), \(1/16\), \(1/32\), or \(1/64\) inch. The best choice depends on the task. Rough home measurements may use eighths or quarters. Cabinetry, trim, and detailed fabrication may use sixteenths or thirty-seconds. Machining and precision work may require decimal inches or millimeters instead.

Rounding should match the real tolerance of the work. If a result is 7 ft 2.03125 in, rounding to the nearest \(1/16\) inch gives 7 ft 2 1/32 in only if thirty-seconds are allowed; rounding to sixteenths gives 7 ft 2 in. Neither display is automatically right or wrong. The right display is the one that matches the measuring tool, the material, and the tolerance.

When adding several fractional-inch measurements by hand, convert each mixed number to total inches first. This prevents mistakes such as treating 8 in plus 7 in as 15 in without carrying the extra foot. It also prevents fraction-denominator mistakes. For example, \(5/8 + 3/16\) is easier when both are converted to sixteenths: \(10/16 + 3/16 = 13/16\).

When to use mixed feet and inches instead of decimal feet

Mixed feet and inches are easy to read on tape measures, construction drawings, home projects, height records, and everyday dimensions. Decimal feet are easier for spreadsheets, engineering worksheets, software inputs, and quantity formulas. The best format depends on the next step in the workflow.

Use mixed feet and inches when a person will physically measure or mark the length with a tape measure. A result such as 8 ft 7 1/2 in is faster to mark than 8.625 ft. It also reduces the chance that someone reads a decimal foot as inches. In the field, ft-in notation is direct and practical.

Use decimal feet when a formula expects a single number in feet. Square footage calculations often use decimal feet because area is found by multiplying length by width. If a room is 12 ft 6 in by 9 ft 4 in, you should convert both dimensions to decimal feet before multiplying. \(12\text{ ft }6\text{ in} = 12.5\text{ ft}\), and \(9\text{ ft }4\text{ in} \approx 9.3333\text{ ft}\). Then the approximate area is \(12.5\times 9.3333 = 116.67\text{ ft}^2\). For full room-area workflows, use the square footage calculator.

Use total inches when the measurements are small or when you are dividing by a repeated spacing. For example, cabinet hardware, drawer fronts, shelf pin spacing, machine parts, fabric widths, and repeated cuts often become simpler in inches. A total length of 82 in is easier to divide into equal gaps than 6 ft 10 in, even though they represent the same length.

Use metric units when sharing dimensions internationally, matching a metric drawing, or ordering parts from a supplier that uses millimeters or centimeters. Millimeters are especially common for product dimensions and fabrication tolerances. The calculator gives metric equivalents directly, while dedicated conversion pages such as the meters to feet and inches converter and the centimeters to feet and inches converter help when the starting value is already metric.

Common use cases

Construction and remodeling

Feet and inches appear constantly in framing, trim, drywall, flooring, cabinets, door openings, stair parts, windows, shelves, countertops, and layout lines. A mixed-unit calculator helps subtract openings, add partial spans, multiply repeated boards, and divide a wall into equal sections. It is especially useful when a measurement includes fractional inches and the result must still be readable on a tape measure.

Interior design and furniture

Furniture dimensions, rug sizes, curtain drops, wall art placement, cabinet clearances, bed frames, tables, and shelving often use feet and inches. A calculator helps compare product dimensions, check clearances, and convert final sizes to metric for international specifications. If a supplier lists dimensions in centimeters, a conversion tool can work in the other direction before layout begins.

Height and body measurements

Personal height in the United States is commonly written as feet and inches. The same height may need to be converted to centimeters for medical forms, school records, sports profiles, travel documents, or international applications. This calculator can convert the mixed value, while height-specific tasks can use a dedicated height converter.

Fabric, craft, and maker projects

Fabric lengths, foam inserts, wood strips, acrylic pieces, mat boards, and 3D project components often combine feet, inches, and fractions. The calculator is useful for repeated cuts, subtracting seam allowances, dividing material into panels, and converting finished dimensions to millimeters for digital fabrication.

Education and measurement practice

Students learning customary units often need to understand why 12 inches make 1 foot, how to carry inches into feet, and how to convert between mixed numbers and decimals. The calculator provides answers, but the worked examples show the method so students can learn the arithmetic rather than only copying a result.

Conversion reference table

The table below gives common equivalent values. These are useful for checking calculator results and for recognizing familiar measurement patterns.

For direct one-step conversions, use a dedicated converter when it matches your exact task. Examples include feet to inches, inches to feet, inches to feet and inches, and the full unit converters hub.

Adding and subtracting feet and inches without mistakes

The most reliable manual method is to convert both measurements to inches first. This avoids carrying errors. For addition, add total inches and then convert back. For subtraction, subtract total inches and then convert back. This method also handles cases where the inches column would otherwise go above 12 or below 0.

For example, subtracting 4 ft 9 in from 10 ft 2 in can be awkward if you try to subtract inches first, because 2 in is smaller than 9 in. Converting to total inches avoids borrowing confusion: \(10\text{ ft }2\text{ in}=122\text{ in}\), and \(4\text{ ft }9\text{ in}=57\text{ in}\). The difference is \(65\text{ in}=5\text{ ft }5\text{ in}\).

If you prefer the column method, remember that 1 ft can be borrowed as 12 in. In the same example, 10 ft 2 in becomes 9 ft 14 in after borrowing 1 ft. Then \(14-9=5\) in and \(9-4=5\) ft, giving 5 ft 5 in. Both methods work, but total inches are usually safer when fractions are involved.

For negative results, the calculator keeps the sign on the total length. If Value A is shorter than Value B in subtraction, the result is negative. In practical work, this means the second measurement exceeds the first by that amount. For example, if an opening is larger than the available panel, a negative result shows the shortage.

Multiplying and dividing feet and inches

Multiplication and division with feet and inches should usually be done with a scalar. A scalar is a plain number such as 2, 4, 6.5, or 0.75. If one trim piece is 2 ft 7 in and you need 8 identical pieces, you multiply the length by the scalar 8. If a board is 9 ft 0 in and you divide it into 3 equal parts, you divide by the scalar 3.

The calculator therefore treats multiply and divide operations as scaling Value A by the scalar field. This keeps the units meaningful. Multiplying a length by another length creates an area, not a length. For example, 6 ft multiplied by 4 ft is 24 square feet, not 24 feet. If your goal is area, convert dimensions to decimal feet and use an area calculator or square footage workflow.

When multiplying repeated pieces, remember to add cut allowance, kerf, or waste if the material is physically cut. Suppose each piece is 1 ft 7 1/2 in and you need 6 pieces. The clean total is 9 ft 9 in. If each cut removes \(1/8\) in and there are 6 cuts, that adds \(6/8 = 3/4\) in of saw kerf. The material required becomes 9 ft 9 3/4 in before any additional waste.

When dividing a total length, decide whether spacing or piece length matters. If you divide a 90 in board into five equal pieces, each is 18 in before kerf. If cuts remove material and the finished pieces must be equal, subtract the total kerf from the available length before dividing. This is why practical cutting plans can differ from pure arithmetic.

Manual checking workflow

A short written check prevents most feet-and-inches mistakes. Start by recording the original measurement exactly as given. Then convert it to total inches. Next, perform the arithmetic. After that, normalize the result to feet and inches. Finally, round only the final result to the fraction or decimal precision required by the job.

1. Write the original values: for example, 8 ft 7 1/2 in and 2 ft 5 3/4 in.
2. Convert each to total inches using \(12f+i\).
3. Perform the operation in inches.
4. Divide by 12 to recover feet and inches.
5. Convert to decimal feet, centimeters, or millimeters if needed.
6. Round the final result to the real measurement tolerance.

This workflow is useful for students and for practical jobs. It also makes it easier to find where a disagreement occurred. If two people get different results, compare their total inches first. If the total inches match, the arithmetic is correct and the difference may be only a display or rounding issue.

Common mistakes to avoid

Forgetting that 12 inches make 1 foot. If an addition gives 17 inches, convert 12 inches into 1 foot and leave 5 inches.

Mixing decimal feet with inches. A value of 5.5 ft is 5 ft 6 in, not 5 ft 5 in. The decimal part of a foot must be multiplied by 12 to become inches.

Rounding too early. If you round every intermediate result to the nearest quarter inch, the final answer may drift. Keep precision through the arithmetic and round at the end.

Using scalar multiplication incorrectly. Multiplying length by length produces area. Multiplying length by a count produces a length total.

Ignoring cut loss. A repeated-cut total does not include saw kerf, trimming, seam overlap, or waste unless you add those allowances separately.

Reading fractional inches as decimals. \(1/8\) in is 0.125 in, not 0.18 in. Use fraction conversion or the calculator's fraction selector.

Confusing total inches and inches remainder. A result of 65 total inches is 5 ft 5 in, not 65 in as the remainder after feet are extracted.

Tape measure workflow for accurate ft-in calculations

A feet and inches calculator is most useful when it is paired with a clear measuring workflow. The calculator can handle arithmetic precisely, but it cannot know whether the original measurement was read correctly. A tape measure has whole feet, whole inches, and fractional marks, so the first job is to read the tape consistently. For many everyday tape measures, the largest marks after each inch represent half inches, then quarters, eighths, and sixteenths. Some tapes include thirty-second marks, but they can be difficult to read quickly on a jobsite.

When measuring a length, keep the tape straight and under light tension. A sagging tape can make a long measurement read too large. A twisted tape can make the mark difficult to read. For inside measurements, check whether the tape case length is being added correctly or whether a separate measurement method is needed. For outside measurements, place the tape hook consistently. Tape hooks are designed to move slightly to account for inside and outside measurements, but a damaged hook can introduce error.

Write measurements in a consistent format. A notation such as 7 ft 4 3/8 in is clearer than writing 7-4-3/8 without labels, especially if another person will use the value later. If you are entering the value into the calculator, put 7 in the feet field, 4 in the inches field, and 3/8 in the fraction selector. If the tape reading is 7 ft 4.375 in, you can enter 7 feet and 4.375 inches instead. Both represent the same length.

For repeated measurements, decide whether each piece should be measured from the same reference point or added cumulatively. In layout work, cumulative marking can create accumulated error if each mark is made from the previous mark. When precision matters, mark repeated spacings from a fixed baseline whenever possible. The calculator can divide a total span into equal parts, but the physical layout still needs a consistent marking method.

For cutting work, distinguish between measured length, marked length, and finished length. A board may be marked at 36 in, but the saw blade removes material. If the finished piece must be exactly 36 in, cut on the waste side of the line and account for blade kerf. If several pieces are cut from one stock length, add the total kerf before deciding whether the stock is long enough. The calculator gives the arithmetic length; the craft or installation process determines the allowance.

For long spans such as walls, fences, trim runs, or room dimensions, take at least two measurements when possible. Walls may not be perfectly square, floors may slope, and existing trim may not be straight. A length measured at floor level can differ from the same length measured at countertop or ceiling height. If you are ordering material, use the measurement that matches where the material will actually be installed.

Using feet and inches before area and volume calculations

Many measurement workflows begin with feet and inches but do not end there. Area, volume, material quantities, and cost estimates usually require a single consistent unit. That means a mixed value such as 12 ft 6 in often needs to become 12.5 ft before it is multiplied by another dimension. This is one of the most important reasons to use a feet and inches calculator: it prepares real measurements for formulas that expect decimal inputs.

For rectangular area, convert both dimensions to decimal feet first. If a room is 12 ft 6 in long and 9 ft 4 in wide, the length is \(12 + 6/12 = 12.5\) ft. The width is \(9 + 4/12 \approx 9.3333\) ft. The area is approximately \(12.5\times 9.3333 = 116.67\text{ ft}^2\). If you instead multiply 12.6 by 9.4, you are treating inches as tenths of a foot, which is incorrect. A value of 12 ft 6 in is not 12.6 ft; it is 12.5 ft.

This issue also appears in volume. Suppose a planter is 6 ft 8 in long, 2 ft 3 in wide, and 1 ft 6 in deep. Convert each dimension to decimal feet before multiplying. The length is \(6 + 8/12 = 6.6667\) ft, the width is \(2 + 3/12 = 2.25\) ft, and the depth is \(1 + 6/12 = 1.5\) ft. The volume is approximately \(6.6667\times 2.25\times 1.5 = 22.5\text{ ft}^3\). This volume can then be converted to cubic yards or other units if needed.

For square footage, decimal feet are usually the cleanest input. Use this calculator to turn each mixed dimension into decimal feet, then use a dedicated square footage calculator when the project is a room, wall, floor, deck, patio, or rectangular surface. Keeping the steps separate avoids confusing length arithmetic with area arithmetic. Feet and inches are lengths; square feet are areas.

For material cost, the same rule applies. If trim is priced by the linear foot, keep the result as a length. If flooring, paint, tile, or sheet material is priced by the square foot, convert dimensions into area first. If concrete, soil, mulch, or fill is priced by volume, convert dimensions into volume. A mixed-length calculator is a starting point, not a substitute for the correct area or volume formula.

For metric drawings, convert the final length to millimeters or centimeters before using metric formulas. If a product is manufactured in millimeters, a dimension such as 4 ft 7 1/2 in should become \(55.5\times 25.4 = 1409.7\) mm. When a tolerance is stated in millimeters, keep the metric value rather than converting back and forth repeatedly. Repeated rounding between systems can introduce unnecessary differences.

Choosing the right precision

Precision should match the task. A rough furniture placement may only need the nearest inch. A curtain rod might need the nearest quarter inch. Trim carpentry often uses sixteenths. Cabinetry may use thirty-seconds. Metalwork, machining, and digital fabrication may use decimal inches or millimeters. The calculator can show several formats, but the final answer should be rounded to a level that the measuring tool and material can actually support.

Rounding to a smaller fraction does not automatically make a measurement more accurate. If the original measurement was taken quickly to the nearest quarter inch, displaying the result to the nearest sixty-fourth inch creates false precision. It looks exact, but the input was not exact enough to justify it. Good measurement practice keeps the stated precision aligned with the source measurement.

For addition and subtraction, the final precision should usually match the least precise input. If one dimension is measured to the nearest \(1/16\) in and another is measured to the nearest \(1/4\) in, the final practical result is rarely better than \(1/4\) in unless the less precise measurement is rechecked. For multiplication or division, rounding depends on the use case. A repeated cut layout may need a practical fraction, while a spreadsheet may need decimal feet.

For construction tolerances, precision is only one part of the question. Materials expand, walls move, boards bow, floors slope, and cuts have width. A calculated result of 32 7/64 in may be mathematically correct, but the installer may choose 32 1/8 in because that is the practical cut tolerance. The calculator gives a numerical result; the user must still apply field judgment.

For academic work, show enough steps to prove the conversion method. If the problem asks for feet and inches, normalize the result. If it asks for decimal feet, divide total inches by 12. If it asks for centimeters, multiply total inches by 2.54. If it asks for a rounded result, state the rounding unit. This makes the answer easier to check.

For digital fabrication, use the units required by the machine or drawing file. Many CNC, laser, and 3D workflows prefer millimeters or decimal inches. In those cases, use the mixed ft-in result for human communication, but use the decimal or metric output for the file. A dedicated page such as the feet and inches to millimeters converter is also useful when the only goal is a clean metric value.

Choosing between this calculator and single-purpose converters

This feet and inches calculator is best when you need arithmetic and multiple outputs at the same time. It handles mixed ft-in addition, subtraction, scalar multiplication, scalar division, fractional-inch rounding, total inches, decimal feet, yards, meters, centimeters, and millimeters. That makes it a good general workspace for measurement problems that involve more than one step.

Use a single-purpose converter when the task is only one conversion. If you already have feet and inches and only need total inches, the feet and inches to inches calculator gives that direct result. If you have total inches and want a mixed result, the inches to feet and inches calculator is more focused. If you have feet and want inches, use the feet to inches calculator. If you have inches and want decimal feet, use the inches to feet calculator.

Use metric converters when the starting value is metric. If a drawing lists centimeters and you need a ft-in result, use the centimeters to feet and inches converter. If a drawing lists meters and you need a mixed customary result, use the meters to feet and inches converter. If the starting value is already feet and inches and you need metric output after arithmetic, this calculator is more flexible.

Use a height converter when the measurement is personal height and the main outputs are height formats. Height pages often focus on common height notation, centimeters, meters, and sometimes health or body-size contexts. This page stays focused on length arithmetic. It can handle height, but it also handles boards, rooms, shelves, openings, panels, fabric, and layout measurements.

Use a general unit hub when you are not sure which converter you need. The unit converters page is useful for finding related length tools. A calculator page works best when the input and output are already clear; a hub is useful when you are deciding which tool fits the job.

Quality checks for professional measurement notes

When measurements are part of a professional note, drawing markup, estimate, or order, include enough information for another person to reproduce the number. A good measurement note should show the original value, the operation, the converted total inches if arithmetic was performed, the final result, and the rounding rule. This is especially important when the measurement will be used for cutting, ordering, or installation.

For example, instead of writing "trim total = 23 ft 2 in," write "Trim total: 5 pieces at 4 ft 7 1/2 in each = 55.5 in per piece; \(55.5\times 5=277.5\) in = 23 ft 1 1/2 in before waste." This note shows exactly how the result was created. It also makes it easy to add kerf or waste later.

If the measurement comes from a plan, record the plan scale and revision. A dimension taken from an older drawing can conflict with a newer field measurement. If the value comes from a physical space, record whether it was measured at the floor, centerline, countertop, ceiling, outside edge, or inside opening. Feet and inches are simple units, but the reference points matter.

If several people will use the result, write both mixed and decimal forms when helpful. For example, a note might say "8 ft 7 1/2 in (8.625 ft)." The mixed form is easy to mark with a tape measure. The decimal form is easy to use in a spreadsheet. If a metric supplier is involved, add millimeters as well. This prevents each person from repeating the conversion independently and possibly rounding differently.

If the result is rounded, state the rounding. A result of 4 ft 2 3/16 in is different from 4 ft 2.19 in, even though they are close. If the final cut is rounded to the nearest \(1/16\) in, say so. If the final drawing dimension is kept in decimal inches, say that instead. Clear rounding notes reduce disputes and rework.

Reviewing measurements before buying or cutting

Before buying material or making a cut, review the measurement in the same format that will be used for the action. If a saw operator will mark the piece with a tape measure, review the mixed feet-and-inches result and the fractional-inch result. If a spreadsheet will calculate cost, review decimal feet or total inches. If a supplier will manufacture a part in a metric shop, review millimeters. A correct number in the wrong format can still cause a practical error.

For buying long material, compare the calculated total with available stock lengths. A total of 23 ft 1 1/2 in may require three 8 ft boards, two 12 ft boards, or a different combination depending on waste, knots, grain, defects, and cut sequence. The calculator tells you the clean arithmetic total. The buying decision must also consider how that total can be divided across real stock lengths.

For cutting multiple pieces, sort the cut list before purchasing or cutting. Long pieces should often be planned first because they have fewer placement options on a board, pipe, strip, or roll. Short pieces can often be cut from leftovers. A feet-and-inches calculator helps total the cut lengths, but a cut plan helps reduce waste. If the material is expensive, create a simple list showing each piece, its length in inches, the number of pieces, and the total inches required.

For installation, compare calculated dimensions with the actual space. A cabinet, panel, frame, or shelf may be calculated correctly but still fail to fit if the opening is out of square, if the wall bows, if flooring thickness changed, or if hardware needs clearance. When tolerance matters, measure at more than one point. A single ft-in value may not describe the whole opening.

For communication, avoid ambiguous shorthand. A note such as 5-10 can mean 5 ft 10 in to one person, but it can look like a subtraction problem or a date to someone else. Write 5 ft 10 in, 70 in, or 177.8 cm depending on the context. If a dimension is critical, include at least two formats. For example, "5 ft 10 in (70 in)" is hard to misread.

For final checks, reverse the conversion. If the calculator says 8 ft 1 in, multiply 8 by 12 and add 1 to confirm 97 inches. If it says 187.96 cm, divide by 2.54 to confirm 74 inches. Reverse checks are quick and catch many input mistakes, especially when a number was copied from a drawing, email, product page, or handwritten note.

Practice questions

Use these questions to check your understanding of mixed feet-and-inches arithmetic.

1. Add 6 ft 8 in and 3 ft 9 in.
2. Subtract 2 ft 11 in from 7 ft 4 in.
3. Convert 5 ft 6 in to total inches and centimeters.
4. Multiply 1 ft 7 1/2 in by 8.
5. Divide 9 ft 0 in into 4 equal lengths.
6. Convert 84 inches to feet and inches.
7. Write 8.25 ft as feet and inches.

Answers: 10 ft 5 in; 4 ft 5 in; 66 inches and 167.64 cm; 13 ft 0 in; 2 ft 3 in; 7 ft 0 in; 8 ft 3 in.

Frequently asked questions