📏 Feet & Inches ↔ Millimeters Converter
Imperial to Metric Precision Conversion
📐 Exact Conversion
1 inch = 25.4 mm (exact)
1 foot = 304.8 mm
🔄 Simple Process
Convert feet to inches first
Then multiply total by 25.4
🔧 Precision
Essential for engineering, manufacturing, and technical work
Choose Conversion Mode:
🔄 Feet & Inches ↔ Millimeters Converter
📋 Quick Reference Tables
Feet & Inches to Millimeters
| Feet & Inches | Millimeters |
|---|---|
| 1' 0" | 304.8 mm |
| 2' 0" | 609.6 mm |
| 3' 0" | 914.4 mm |
| 5' 0" | 1,524 mm |
| 5' 10" | 1,778 mm |
| 6' 0" | 1,829 mm |
| 8' 0" | 2,438 mm |
Millimeters to Feet & Inches
| Millimeters | Feet & Inches |
|---|---|
| 300 mm | ~1' 0" |
| 600 mm | ~2' 0" |
| 1,000 mm | ~3' 3" |
| 1,500 mm | ~4' 11" |
| 1,800 mm | ~5' 11" |
| 2,000 mm | ~6' 7" |
| 2,500 mm | ~8' 2" |
🔧 Practical Applications
🏗️ Construction
2×4 lumber: 38 × 89 mm
2×6 lumber: 38 × 140 mm
Plywood: 18 mm (3/4")
Drywall: 12.7 mm (1/2")
🔩 Hardware
M6 bolt: ~1/4" (6.35 mm)
M8 bolt: ~5/16" (7.94 mm)
M10 bolt: ~3/8" (9.53 mm)
M12 bolt: ~1/2" (12.7 mm)
📐 Dimensions
Door: 6' 8" (2,032 mm)
Ceiling: 8' 0" (2,438 mm)
Counter: 3' 0" (914 mm)
Table: 2' 6" (762 mm)
🧮 Conversion Formulas
Feet & Inches to Millimeters
Step 1: total inches = (feet × 12) + inches
Step 2: mm = total inches × 25.4
Why?
1 foot = 12 inches
1 inch = 25.4 mm (exact)
1 foot = 304.8 mm
Example:
5' 10" = (5 × 12) + 10 = 70 in
70 × 25.4 = 1,778 mm
Millimeters to Feet & Inches
Step 1: total inches = mm ÷ 25.4
Step 2: feet = floor(total inches ÷ 12)
Step 3: inches = total inches mod 12
Related:
1 mm = 0.03937 inches
1 mm = 0.1 cm
1 mm = 0.001 meters
Example:
1,800 mm ÷ 25.4 = 70.87 in
70.87 ÷ 12 = 5' 10.87"
How to convert feet+inches to millimeters
1 foot is equal to 304.8 millimeters:
1 ft = 304.8 mm
1 inch is equal to 25.4 millimeters:
1 in = 25.4 mm
The distance d in millimeters (mm) is equal to the distance d in feet (ft) times 30.48 plus the distance d in inches (in) times 25.4:
d(mm) = d(ft) × 304.8 + d(in) × 25.4
Example
Convert 2 feet + 3 inches to millimeters:
d(mm) = 2ft × 304.8 + 3in × 25.4 = 685.8mm
Feet+inches to millimeters conversion table
| Feet (ft) + Inches (in) | millimeters (mm) | |
|---|---|---|
| 0 ft | 0 in | 0 mm |
| 0 ft | 1 in | 25.4 mm |
| 0 ft | 2 in | 50.8 mm |
| 0 ft | 3 in | 76.2 mm |
| 0 ft | 4 in | 101.6 mm |
| 0 ft | 5 in | 127.0 mm |
| 0 ft | 6 in | 152.4 mm |
| 0 ft | 7 in | 177.8 mm |
| 0 ft | 8 in | 203.2 mm |
| 0 ft | 9 in | 228.6 mm |
| 0 ft | 10 in | 254.0 mm |
| 0 ft | 11 in | 279.4 mm |
| 1 ft | 0 in | 304.8 mm |
| 2 ft | 0 in | 609.6 mm |
| 3 ft | 0 in | 914.4 mm |
| 4 ft | 0 in | 1219.2 mm |
| 5 ft | 0 in | 1524.0 mm |
| 6 ft | 0 in | 1828.8 mm |
| 7 ft | 0 in | 2133.6 mm |
| 8 ft | 0 in | 2438.4 mm |
| 9 ft | 0 in | 2743.2 mm |
| 10 ft | 0 in | 3048.0 mm |
| 20 ft | 0 in | 6096.0 mm |
| 30 ft | 0 in | 9144.0 mm |
| 40 ft | 0 in | 12192.0 mm |
| 50 ft | 0 in | 15240.0 mm |
| 60 ft | 0 in | 18288.0 mm |
| 70 ft | 0 in | 21336.0 mm |
| 80 ft | 0 in | 24384.0 mm |
| 90 ft | 0 in | 27432.0 mm |
| 100 ft | 0 in | 30480.0 mm |
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