Convert kilometers to miles

Explanation

From this page you can convert kilometers to miles (or km to mi) simply, by using the application above.

In case you are wondering, to convert from kilometers to miles you need to multiply by 0.6214. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 km≈0.6214 mi

kilometerskm

dimension	length
system	International system of units (SI)
symbol	km

The kilometer (km) is a unit of length in the International System of Units.

In ascending order, the kilometer comes after the hectometer and before the megameter.

Definition of the kilometer

One kilometer is equal to 1000 meters.

Equivalences

One kilometer is equivalent to:

Some Facts

The Kármán line is the arbitrary upper limit of the atmosphere. It is set 100 kilometers (62 miles) high.
The top of Mount Everest, the most prominent montain on Earth, is more than 8.8 kilometers above sea level.

Prefix

kilo

10³

The prefix kilo- comes from the ancient Greek chilioi meaning thousand. The associated multiplicative factor is 1000 or 10³.

Metric length units

femtometer	fm	0.000 000 000 000 001
picometer	pm	0.000 000 000 001
nanometer	nm	0.000 000 001
micrometer	µm	0.000 001
millimeter	mm	0.001
centimeter	cm	0.01
decimeter	dm	0.1
meter	m	1
dekameter	dam	10
hectometer	hm	100
kilometer	km	1000
megameter	Mm	1 000 000
gigameter	Gm	1 000 000 000
terameter	Tm	1 000 000 000 000
petameter	Pm	1 000 000 000 000 000
exameter	Em	1 000 000 000 000 000 000

The International System of Units

The International System of Units or SI (from the French Système international (d'unité)), also called metric system in the U.S., is a coherent system of units that was published 1960. It is official in nearly every country.

The General Conference on Weights and Measures (Conférence générale des poids et mesures) is tasked with overseeing the SI.

Related Conversions

milesmi

dimension	length
symbol	mi

The mile (mi) is a unit of length in the international mass and length units.

Definition of the mile

One mile is defined as 1760 yards.

From the Weights and Measures Act of 1985: Measurement of length

Value in terms of the SI

One mile is equivalent to 1.609344 kilometers.

History

The mile was a ubiquitous unit throughout history with vastly different lengths in different countries. Today, the mile is used in the United States and in the United Kingdom for road signs.

The name of the unit derives from the latin mille passus meaning a thousand paces.

Some Facts

At 410 miles (660 kilometers), the A1 is the longest road in the UK.

International length units

inch	in
foot	ft	12 inches
yard	yd	3 feet
chain	ch	22 yards
furlong	fur	10 chains
mile	mi	8 furlongs
league	lea	3 miles

The International Mass and Length Units

The International Mass and Length Units are units based on the international yard and the international pound.

They were created in 1959 when Australia, Canada, New Zealand, South Africa, the United Kingdom and the United States of America agreed upon a common definition of the yard and the pound.