How many feet are in a mile?

5,280 feet, or 1,760 yards. A mile is exactly 1,609.344 metres.

What is the difference between a US gallon and a UK gallon?

A US gallon is 3.785 litres. A UK (imperial) gallon is 4.546 litres, about 20% larger.

Why does my hard drive show less space than advertised?

Manufacturers count 1 GB as 1,000,000,000 bytes, while many systems report in GiB of 1,073,741,824 bytes, so the number looks about 7% smaller.

Is there a temperature option?

Temperature needs a different formula because the scales start at different points, so it has its own temperature converter.

Unit Converter: Length, Weight, Volume, Area, Speed, Data and Time

Pick a type, enter a value and choose the units. For example, 1 mile is 1.609 kilometres, 1 kilogram is 2.205 pounds and 1 US gallon is 3.785 litres.

Value

From

1 km =

0.621371 mi

1 km

0.62137119 mi

1 km in every length unit

Millimetres: 1,000,000
Centimetres: 100,000
Metres: 1,000
Kilometres: 1
Inches: 39,370.079
Feet: 3,280.8399
Yards: 1,093.6133
Miles: 0.62137119
Nautical miles: 0.5399568

Need degrees? Use the temperature converter. Volumes in cups, pints and gallons are US measures unless marked UK.

Show the math

1
Convert km to metres
1 km × 1,000 = 1,000 metres
One kilometre equals 1,000 metres. Going through one common unit keeps every conversion consistent.
= 1,000

Read the steps as text

Convert km to metres. 1 km × 1,000 = 1,000 metres One kilometre equals 1,000 metres. Going through one common unit keeps every conversion consistent.
Convert metres to mi. 1,000 ÷ 1,609.344 = 0.6213711922 mi Dividing by the size of the target unit tells you how many of them fit.

How the conversions work

Every unit is defined by how many base units it contains: metres for length, kilograms for weight, litres for volume, square metres for area, metres per second for speed, bytes for data and seconds for time. To convert, the calculator multiplies your value by the size of the starting unit to get the base amount, then divides by the size of the target unit. The two steps appear in the Show the math panel.

Going through one common base keeps all conversions consistent, so converting from A to B and back always returns your original number. The list below the result shows your value in every unit of that type at once.

Metric, imperial and US customary

Most of the world uses the metric system, based on powers of ten. The United States uses US customary units, and the UK uses a mix of metric and imperial. Many imperial and US units share names but differ in size: a US gallon is 3.785 litres but a UK (imperial) gallon is 4.546 litres, and a US pint is 473 mL while a UK pint is 568 mL. Volumes here are US measures unless they are marked UK.

Handy exact values: 1 inch = 2.54 cm, 1 foot = 0.3048 m, 1 mile = 1.609344 km, 1 pound = 0.45359237 kg and 1 acre = 4,046.86 m².

Data units: KB versus KiB

Storage makers use decimal units where 1 KB is 1,000 bytes, 1 MB is 1 million and 1 GB is 1 billion bytes. Many operating systems count in binary units of 1,024, called KiB, MiB and GiB. That is why a 500 GB drive shows as about 465 GiB in some systems. The converter has both so you can see exactly where the difference comes from.

Frequently asked questions

How many feet are in a mile?: 5,280 feet, or 1,760 yards. A mile is exactly 1,609.344 metres.
What is the difference between a US gallon and a UK gallon?: A US gallon is 3.785 litres. A UK (imperial) gallon is 4.546 litres, about 20% larger.
Why does my hard drive show less space than advertised?: Manufacturers count 1 GB as 1,000,000,000 bytes, while many systems report in GiB of 1,073,741,824 bytes, so the number looks about 7% smaller.
Is there a temperature option?: Temperature needs a different formula because the scales start at different points, so it has its own temperature converter.