Converter for length
Convert between meters (m), centimeters (cm), millimeters (mm), inches (in), feet (ft), yards (yd) and miles (mi). Type in any box—the other value updates instantly.
Quick length converters
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M ↔ FT
1 m = 3.280839895 ft
-
CM ↔ IN
1 cm = 0.3937007874 in
-
KM ↔ MI
1 km = 0.6213711922 mi
-
MM ↔ IN
1 mm = 0.03937007874 in
-
YD ↔ M
1 yd = 0.9144 m
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IN ↔ FT
1 ft = 12 in
Common length conversions (examples)
| M | FT |
|---|---|
| 0.5 | 1.64 |
| 1 | 3.28 |
| 2 | 6.56 |
| 3 | 9.84 |
| 5 | 16.40 |
| 10 | 32.81 |
How length conversions work
The base SI unit for length is the meter (m). Exact definitions used in our tools:
- 1 inch = 25.4 mm (exact)
- 1 foot = 0.3048 m (exact)
- 1 yard = 0.9144 m (exact)
- 1 mile = 1609.344 m (exact)
- 1 meter = 100 cm = 1000 mm
From these definitions, common factors follow: 1 m = 3.280839895 ft, 1 cm = 0.3937007874 in, 1 km = 0.6213711922 mi, and so on. We compute with full precision and round the display for readability.
All length converters
- Meters to Feet converter
- Feet to Meters converter
- Centimeters to Inches converter
- Inches to Centimeters converter
- Kilometers to Miles converter
- Miles to Kilometers converter
- Millimeters to Inches converter
- Inches to Millimeters converter
- Yards to Meters converter
- Meters to Yards converter
- Inches to Feet converter
- Feet to Inches converter
Length conversion FAQs
How many inches are in a centimeter?
Exactly 0.3937007874 inches in 1 centimeter (since 1 in = 2.54 cm exactly).
How many meters are in a foot?
Exactly 0.3048 meters in 1 foot.
How many kilometers are in a mile?
Exactly 1.609344 kilometers in 1 mile. (So 1 km ≈ 0.6213711922 mi.)
Why are some factors exact?
Inch, foot, yard and mile are defined by exact SI relationships (e.g., 1 in = 25.4 mm). That makes conversions precise.