# Convert kilometers to miles

Enter the number of kilometers you want to convert to miles in the text box below. The conversion to length in miles will update as you type.

kilometers (km)
1 kilometers = 0.621 miles

## Precise decimal and fraction answers

The conversion in miles rounded to six significant decimal places is 1 km = 0.621371 mi. The precise fraction answer is 1006/1619 mi.

### Decimal Precision

Conversion from one to ten decimal places

• 1 km = 0.6 mi
• 1 km = 0.62 mi
• 1 km = 0.621 mi
• 1 km = 0.6214 mi
• 1 km = 0.62137 mi
• 1 km = 0.621371 mi
• 1 km = 0.6213712 mi
• 1 km = 0.62137119 mi
• 1 km = 0.621371192 mi
• 1 km = 0.6213711922 mi

## Answer in feet and inches

1 km equals 3280 ft 10 5/64 in using feet, inches and fractional inches instead of decimals as is traditional in the imperial system. This calculation is accurate to the nearest 1/64th of an inch.

## How many miles are in a kilometer?

There are 0.621 miles in one kilometer. A kilometer is 62.14% of a mile. A mile is 60.93% longer than one kilometer.

## Kilometers to miles conversion factor and formulas

Formula

The conversion factor between kilometers and miles is 1.609. This represents the ratio of kilometers per one mile. To calculate the value in miles, we can either divide by the conversion factor or multiply by its inverse.

### Division

To convert from kilometers to miles, divide kilometers by 1.609.
The formula is expressed as:
km ÷ 1.609 = mi

### Multiplication

Alternatively we can multiply 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 kilometers to miles, multiply kilometers by 0.621.
The formula is expressed as:
km × 0.621 = mi

Converting kilometers to miles is a conversion between units from separate unit systems - kilometers are metric (SI) defined units while miles are US Customary / UK Imperial .

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.

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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.

## Reverse this conversion

Convert from miles to kilometers instead.

## 1 kilometers to other length units

### Metric

• 1 km = 1 km
• 1 km = 1,000 m
• 1 km = 10,000 dm
• 1 km = 100,000 cm
• 1 km = 1,000,000 mm
• 1 km = 1×109 µ
• 1 km = 1×1012 nm

### Imperial/U.S.

• 1 km = 0.621 mi
• 1 km = 1,093.613 yd
• 1 km = 3,280.84 ft
• 1 km = 39,370.079 in

## References and Citations

1. International Bureau of Weights and Measures (BIPM) The International System of Units (SI)
2. National Institute of Standards and Technology (NIST) General Tables of Units of Measurement

## Kilometers to miles conversion table

km mi
1 km 0.621 mi
2 km 1.243 mi
3 km 1.864 mi
4 km 2.485 mi
5 km 3.107 mi
6 km 3.728 mi
7 km 4.35 mi
8 km 4.971 mi
9 km 5.592 mi
10 km 6.214 mi
km mi
20 km 12.427 mi
30 km 18.641 mi
40 km 24.855 mi
50 km 31.069 mi
60 km 37.282 mi
70 km 43.496 mi
80 km 49.71 mi
90 km 55.923 mi
100 km 62.137 mi
1,000 km 621.371 mi