Length Converter

Length Converter — mm, cm, m, km, inches, feet, yards, miles

This free length converter instantly converts between every common unit of distance — millimeters, centimeters, meters, kilometers, inches, feet, yards, miles and nautical miles. Whether you are working on a construction plan, following a recipe, planning travel abroad, or doing science homework, it gives an exact answer in one click, on any device, with no sign-up.

How to convert length units

Every length conversion works by multiplying by a fixed factor. To change a metric unit to an imperial one (or the reverse), multiply by the conversion factor for that pair. The converter above does this automatically, but the maths is simple:

• Centimeters to inches: divide by 2.54 (or multiply by 0.3937)
• Meters to feet: multiply by 3.28084
• Kilometers to miles: multiply by 0.621371
• Inches to centimeters: multiply by 2.54
• Miles to kilometers: multiply by 1.60934

Common length conversions

These are the length conversions people look up most often. Every value is exact or rounded to four decimals:

From	Equals
1 centimeter (cm)	0.3937 inches
1 meter (m)	3.2808 feet · 1.0936 yards
1 kilometer (km)	0.6214 miles
1 inch (in)	2.54 cm · 25.4 mm
1 foot (ft)	0.3048 m · 30.48 cm
1 yard (yd)	0.9144 m · 91.44 cm
1 mile (mi)	1.6093 km · 1609.34 m
1 nautical mile	1.852 km · 1.1508 miles

Metric vs imperial length units

The metric system (mm, cm, m, km) is used by most of the world and scales in powers of ten, which makes conversions between metric units easy. The imperial system (inches, feet, yards, miles) is still common in the United States and, for road distances, the United Kingdom. This tool bridges the two so you never have to guess.

Frequently asked questions

How do I convert centimeters to inches?

Multiply the number of centimeters by 0.393701. For example, 10 cm × 0.393701 = 3.94 inches. Or type the value into the converter above.

How many feet are in a meter?

One meter equals 3.28084 feet. To convert meters to feet, multiply by 3.28084; to go from feet to meters, multiply by 0.3048.

How many centimeters are in an inch?

One inch is exactly 2.54 centimeters. This is a defined, exact value in the metric system.

How do I convert kilometers to miles?

Multiply kilometers by 0.621371. For example, 5 km × 0.621371 = 3.11 miles. To convert miles to kilometers, multiply by 1.60934.

What is a nautical mile?

A nautical mile is 1.852 kilometers (about 1.15 statute miles). It is used in sea and air navigation because it corresponds to one minute of latitude.

Is this length converter free?

Yes — it is completely free, works instantly in your browser, needs no sign-up, and has no usage limits.