§ 01 / TOOL
Length Converter.
STATUS READYUNITS 8BASE METER
> CONVERT
// FROM
=
// TO
39.370079
RESULT.
cm → in
39.370079 in.
100 cm = 39.370079 in
§ 02 / ABOUT
How it works.
Pick a value, pick the unit you have, pick the unit you want. Every length unit is stored as a multiplier of meters; converting from A to B is (value × A.factor) ÷ B.factor.
// THE KEY CONVERSIONS
- 1 inch = 2.54 cm exactly
- 1 foot = 12 inches = 30.48 cm
- 1 yard = 3 feet = 91.44 cm
- 1 mile = 5,280 feet = 1.609344 km
- 1 meter ≈ 3.281 ft ≈ 39.37 inches
- 1 kilometer = 0.621 mile
// USE IT FOR
- Construction & DIY — converting between metric blueprints and US lumber dimensions
- Travel — kilometer signs in Europe vs the mile habit
- Fitness — running pace in km vs miles, height in cm vs feet/inches
- Shipping — package dimensions across markets
§ 03 / FAQ
Common questions.
How do I convert feet to meters?+
Multiply by 0.3048. Example: 6 ft × 0.3048 = 1.829 m. The reverse: meters × 3.281 ≈ feet. The exact conversion is fixed by international agreement — 1 ft = 0.3048 m by definition.
How many inches in a meter?+
Exactly 39.3701 inches. So a "round" 1 m measurement is awkward in inches; this is why mixing systems mid-project (a 2x4 in metric millimeters) usually involves at least one rounded number.
Why is the meter the SI base unit?+
Because the metric system is built around it. Originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole. Since 1983 it’s defined by the speed of light: the distance light travels in 1/299,792,458 of a second.
Is a US mile the same as a UK mile?+
Yes for everyday use — both are exactly 5,280 feet = 1,609.344 m. The "nautical mile" is different though (1,852 m), used at sea and in aviation. We have nautical miles in the Speed Converter for converting knots.
§ 04 / TOOLS
Related calculators.
§ 05 / READING