Convert miles to kilometers
Enter the number of miles you want to convert to kilometers in the text box below. The conversion to length in kilometers will update as you type.
{"answerString":"1.609","answerSymbol":"kilometers"}Precise decimal and fraction answers
The conversion in kilometers rounded to six significant decimal places is 1 mi = 1.609344 km. The precise fraction answer is 1 613/1006 km.
Decimal Precision
Conversion from one to ten decimal places
- 1 mi = 1.6 km
- 1 mi = 1.61 km
- 1 mi = 1.609 km
- 1 mi = 1.6093 km
- 1 mi = 1.60934 km
- 1 mi = 1.609344 km
- 1 mi = 1.6093440 km
- 1 mi = 1.60934400 km
- 1 mi = 1.609344000 km
- 1 mi = 1.6093440000 km
How many kilometers are in a mile?
There are 1.609 kilometers in one mile. A mile is 1.609 times longer than a kilometer. A kilometer is 62.14% of a mile
Miles to kilometers conversion factor and formulas
FormulaThe conversion factor between miles and kilometers is 1.609. This represents the ratio of kilometers per one mile. To calculate the value in kilometers, we can either multiply by the conversion factor or divide by its inverse.
Multiplication
To convert from miles to kilometers, multiply miles by 1.609.
The formula is expressed as:
mi × 1.609 = km
Division
Alternatively we can divide by the inverse conversion factor to get the same result.
The inverse of 1.609 is 1/1.609 or 0.621.
To convert from miles to kilometers, divide miles by 0.621.
The formula is expressed as:
mi ÷ 0.621 = km
About this conversion
Converting miles to kilometers is a conversion between units from separate unit systems - miles are US Customary / UK Imperial defined units while kilometers are metric (SI) .
<About Miles
Customary/Imperial UnitThe mile is a measure of distance between two points used within the US Customary and British Imperial units of measure. It is customarily used to measure large geographical distances. The mile is officially defined as 5,280 feet, 1,760 yards or 1,609.344 meters. The abbreviation or for miles is 'mi' or sometimes 'm' as in miles per hour. The mile's origin stems from the Roman mile, which marked the distance the Roman army could march over 1,000 (mille) paces.
About Kilometers
SI UnitWithin the SI (metric) system of measurement, the kilometer is officially defined as being equal to 1,000 meters. It is commonly used as measurement for geographic distances in similar circumstances where a mile would be used in the U.S. Internationally it is spelled 'kilometre' whereas the U.S. spells it 'kilometer'. The symbol for a kilometer is km however k is sometimes used.
Reverse this conversion
Convert from kilometers to miles instead.
1 miles to other length units
Metric
- 1 mi = 1.609 km
- 1 mi = 1,609.344 m
- 1 mi = 16,093.44 dm
- 1 mi = 160,934.4 cm
- 1 mi = 1,609,344 mm
- 1 mi = 1.609×109 µ
- 1 mi = 1.609×1012 nm
Imperial/U.S.
- 1 mi = 1 mi
- 1 mi = 1,760 yd
- 1 mi = 5,280 ft
- 1 mi = 63,360 in
References and Citations
- National Institute of Standards and Technology (NIST) General Tables of Units of Measurement
- International Bureau of Weights and Measures (BIPM) The International System of Units (SI)
Miles to kilometers conversion table
| mi | km |
|---|---|
| 1 mi | 1.609 km |
| 2 mi | 3.219 km |
| 3 mi | 4.828 km |
| 4 mi | 6.437 km |
| 5 mi | 8.047 km |
| 6 mi | 9.656 km |
| 7 mi | 11.265 km |
| 8 mi | 12.875 km |
| 9 mi | 14.484 km |
| 10 mi | 16.093 km |
| mi | km |
|---|---|
| 20 mi | 32.187 km |
| 30 mi | 48.28 km |
| 40 mi | 64.374 km |
| 50 mi | 80.467 km |
| 60 mi | 96.561 km |
| 70 mi | 112.654 km |
| 80 mi | 128.748 km |
| 90 mi | 144.841 km |
| 100 mi | 160.934 km |
| 1,000 mi | 1,609.344 km |