Length Converter
Convert between meters, feet, inches, kilometers, and miles.
Inputs
Allowed range: 0 to 1000000000
Results
Meters
1.0000
Feet
3.2808
Inches
39.3701
Kilometers
0.001000
Miles
0.000621
How it works
All conversions go through meters as the base unit.
Complete guide
Length conversions are everywhere — international travel, online shopping, DIY projects, sports stats. The metric system (meter-based) is the global standard; the U.S. and a few other countries still use feet, inches, and miles in daily life.
Useful reference points: 1 meter ≈ 3.28 feet, 1 inch = exactly 2.54 cm, 1 mile = 1.609 km, 1 km ≈ 0.621 miles. A standard doorway is about 80 inches (2 m) tall. A marathon is 42.195 km or 26.219 miles.
This calculator routes everything through meters as the base unit, so conversions between any two units are exact (no chained rounding errors).
Frequently asked questions
- Why is 1 inch exactly 2.54 cm?
- It was defined that way in 1959 by an international agreement to standardize the inch across English-speaking countries.
- What's the difference between U.S. and U.K. miles?
- Both are now identical at 1,609.344 meters. The old 'survey mile' used in some U.S. mapping work is fractionally longer but was retired in 2022.
- How precise are the results?
- Conversions are computed using exact factors. The display rounds to 4–6 decimal places, which is more than enough for everyday use.
- Can I convert nautical miles?
- Not in this version. A nautical mile equals 1,852 meters — multiply your meter result by 0.00054 to estimate.