Length Converter

Type a length, choose the unit you have and the unit you want, and read the answer straight away, together with the same length in every other unit. It runs in your browser and nothing is uploaded.

Value

From

0.6213712 mi

1 km = 0.6213712 mi

The same amount in every unit

Millimetres: 1,000,000 mm
Centimetres: 100,000 cm
Metres: 1,000 m
Kilometres: 1 km
Inches: 39,370.08 in
Feet: 3,280.84 ft
Yards: 1,093.613 yd
Miles: 0.6213712 mi

Calculated instantly in your browser with standard formulas. Double-check anything important. Full disclaimer and terms of use.

Length conversion factors

All of these are exact, because the inch, foot, yard and mile are defined in metres. To convert, multiply by the factor.

Unit	In metres	Useful to remember
1 millimetre	0.001 m	10 mm = 1 cm
1 centimetre	0.01 m	2.54 cm = 1 inch
1 inch	0.0254 m	12 inches = 1 foot
1 foot	0.3048 m	3 feet = 1 yard
1 yard	0.9144 m	1,760 yards = 1 mile
1 kilometre	1,000 m	about 0.6214 miles
1 mile	1,609.344 m	5,280 feet = 1.609344 km

Kilometres and miles: quick reference

Kilometres	Miles	Miles	Kilometres
1 km	0.6214 mi	1 mi	1.609 km
5 km	3.107 mi	5 mi	8.047 km
10 km	6.214 mi	10 mi	16.093 km
21.0975 km (half marathon)	13.109 mi	26.2 mi (marathon)	42.165 km
42.195 km (marathon)	26.219 mi	100 mi	160.934 km

Feet, inches and centimetres

To change inches to centimetres, multiply by 2.54. 6 inches is 15.24 cm and 36 inches is 91.44 cm.
To change feet to metres, multiply by 0.3048. 6 feet is 1.8288 m.
To change metres to feet, divide by 0.3048 (or multiply by 3.2808). 100 m is about 328.08 ft.
For a height such as 5 ft 9 in, change it to inches first (5 × 12 + 9 = 69), then multiply by 2.54 to get 175.26 cm.

Which system is used where

Most of the world uses the metric system (metres and kilometres). The United States uses feet, inches and miles for everyday lengths, and the United Kingdom still uses miles for road distances. Canada is officially metric but people often give heights in feet and inches. This is why converting between the two comes up so often when travelling, shopping online or following a recipe or sewing pattern.

How to convert length in Excel or Google Sheets

Use =CONVERT(A1,"km","mi") to change the number in A1 from kilometres to miles. The unit codes include "m", "km", "cm", "mm", "in", "ft", "yd" and "mi".

How to use the Length Converter tool

Type the length in the Value box.
Choose the unit you are converting from and the unit you want.
Read the answer, or press the arrows to swap the two units.
Look at the table underneath for the same length in every unit, and copy the answer if you need it.

Frequently asked questions

How many miles are in a kilometre?

One kilometre is 0.621371 miles, and one mile is 1.609344 kilometres. A quick way to estimate is to multiply kilometres by 0.6: 10 km is about 6.2 miles.

How many centimetres are in an inch?

There are exactly 2.54 centimetres in an inch. To change centimetres to inches, divide by 2.54. For example, 170 cm is about 66.93 inches, or 5 feet 6.9 inches.

How many feet are in a mile?

A mile has 5,280 feet, or 1,760 yards. A foot is exactly 0.3048 metres.

How do I convert feet and inches to centimetres?

Change the feet to inches (1 foot = 12 inches), add the extra inches, then multiply by 2.54. A person who is 5 ft 9 in is 69 inches tall, which is 69 × 2.54 = 175.26 cm.

Are these conversions exact?

The inch, foot, yard and mile are defined exactly in metres (1 inch = 0.0254 m), so the conversions are exact. The calculator shows up to 7 significant digits to keep the answer easy to read.