# 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.

miles (mi)
1 miles = 1.609 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

Formula

The 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

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) .

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Customary/Imperial Unit

The 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.

SI Unit

Within 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

1. National Institute of Standards and Technology (NIST) General Tables of Units of Measurement
2. 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