📐 Feet & Inches ↔ Decimal Feet
Imperial Format to Decimal Converter
📏 Simple Conversion
Divide inches by 12
Add to whole feet
🔄 Both Directions
Format to decimal
Or decimal to format
🏗️ Construction Use
Essential for blueprints, engineering, and calculations
Choose Conversion Mode:
🔄 Feet & Inches ↔ Decimal Feet
📊 Conversion Tables
Feet & Inches to Decimal
| Feet & Inches | Decimal Feet |
|---|---|
| 1' 0" | 1.000 ft |
| 1' 3" | 1.250 ft |
| 1' 6" | 1.500 ft |
| 2' 0" | 2.000 ft |
| 2' 6" | 2.500 ft |
| 3' 0" | 3.000 ft |
| 5' 0" | 5.000 ft |
| 10' 6" | 10.500 ft |
Inch Increments
| Inches | Decimal | Add to Feet |
|---|---|---|
| 1" | 0.0833 | + 0.08 |
| 2" | 0.1667 | + 0.17 |
| 3" | 0.2500 | + 0.25 |
| 4" | 0.3333 | + 0.33 |
| 6" | 0.5000 | + 0.50 |
| 9" | 0.7500 | + 0.75 |
| 12" | 1.0000 | + 1.00 |
🎯 Practical Applications
🏗️ Construction
Room: 12' 6" = 12.5 ft
Wall: 8' 9" = 8.75 ft
Door: 6' 8" = 6.667 ft
Window: 3' 6" = 3.5 ft
📐 Engineering
Area Calc: Use decimals
Volume: Multiply decimals
CAD: Enter decimal feet
Plans: Convert dimensions
📏 Surveying
Property: Decimal format
Elevation: 5' 3" = 5.25 ft
Grade: Use decimals
Distance: Precise calcs
🧮 Conversion Formulas
Feet & Inches to Decimal
decimal feet = feet + (inches ÷ 12)
Steps:
1. Divide inches by 12
2. Add result to feet
Example:
10' 6"
= 10 + (6 ÷ 12)
= 10 + 0.5
= 10.5 decimal feet
Decimal to Feet & Inches
feet = floor(decimal)
inches = (decimal - feet) × 12
Steps:
1. Whole number = feet
2. Decimal part × 12 = inches
Example:
10.75 feet
Feet: 10
Inches: 0.75 × 12 = 9"
Result: 10' 9"
How to convert feet+inches to feet
1 foot is equal to 12 inches:
1ft = 12″
The distance d in feet (ft) is equal to the distance d in feet (ft) plus the distance d in inches (″) divided by 12:
d(ft) = d(ft) + d(″)/12
Example
Convert 2 feet + 3 inches to feet:
d(ft) = 2ft + 3″/12 = 2.25ft
Feet to inches conversion table
| Feet (ft) | Inches (“) |
|---|---|
| 0.01 ft | 0.12 ″ |
| 0.1 ft | 1.2 ″ |
| 0.2 ft | 2.4 ″ |
| 0.3 ft | 3.6 ″ |
| 0.4 ft | 4.8 ″ |
| 0.5 ft | 6.0 ″ |
| 0.6 ft | 7.2 ″ |
| 0.7 ft | 8.4 ″ |
| 0.8 ft | 9.6 ″ |
| 0.9 ft | 10.8 ″ |
| 1 ft | 12 ″ |
| 2 ft | 24 ″ |
| 3 ft | 36 ″ |
| 4 ft | 48 ″ |
| 5 ft | 60 ″ |
| 6 ft | 72 ″ |
| 7 ft | 84 ″ |
| 8 ft | 96 ″ |
| 9 ft | 108 ″ |
| 10 ft | 120 ″ |
| 100 ft | 1200 ″ |
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