Kilometers to Miles Converter
Enter the length in kilometers below to convert it to miles.
Convert Kilometers to Miles
Enter a value in kilometers (km) to convert to miles (mi).
Kilometers to Miles Conversion Chart (1–40 Continuous)
Continuous 1 to 40 kilometers lookup table with exact decimals and reduced nearest 1/64 fractions. Highlighted rows mark common shop and ruler values.
| Kilometers (km) | Decimal (mi) | Fraction — Nearest 1/64 (Reduced) | Nearest 1/16 (Tape) |
|---|---|---|---|
1 km★ Common | 0.621371 mi | 5/8 mi | 5/8 mi |
2 km★ Common | 1.242742 mi | 1 1/4 mi | 1 1/4 mi |
3 km★ Common | 1.864114 mi | 1 55/64 mi | 1 7/8 mi |
4 km | 2.485485 mi | 2 31/64 mi | 2 1/2 mi |
5 km★ Common | 3.106856 mi | 3 7/64 mi | 3 1/8 mi |
6 km★ Common | 3.728227 mi | 3 47/64 mi | 3 3/4 mi |
7 km | 4.349598 mi | 4 11/32 mi | 4 3/8 mi |
8 km★ Common | 4.97097 mi | 4 31/32 mi | 5 mi |
9 km | 5.592341 mi | 5 19/32 mi | 5 9/16 mi |
10 km★ Common | 6.213712 mi | 6 7/32 mi | 6 3/16 mi |
11 km | 6.835083 mi | 6 53/64 mi | 6 13/16 mi |
12 km★ Common | 7.456454 mi | 7 29/64 mi | 7 7/16 mi |
How to Convert Kilometers to Miles
To convert kilometers to miles, multiply the length by the following conversion ratio: 0.6213712 miles/kilometer.
Since one kilometer is equal to 0.6213712 miles, you can use this simple formula to convert:
The length in miles is equal to the length in kilometers multiplied by 0.6213712.
For example, here's how to convert 10 kilometers to miles using the formula above.
How Many Miles Are in a Kilometer?
There are 0.6213712 miles in a kilometer, which is why we use this value in the formula above.
Our kilometer fraction and decimal calculator can convert kilometers and miles, and it automatically converts the results to US customary, imperial, and SI metric values.
Kilometers and miles are both units used to measure length. Keep reading to learn more about each unit.
What Is a Kilometer?
A kilometer is a unit of length equal to 1,000 meters (m), the base unit for length. Metric unit equal to 1,000 meters. [1]
The kilometer is classified as an International System of Units (SI) unit of length. Kilometers can be abbreviated as km; for example, 1 kilometer can be written as 1 km.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilometer (km) a convenient decimal multiple of the meter (m).
In practice, kilometers (km) are widely used across large-scale industrial, bulk, and macro-level length specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Mile?
A mile is a unit of length equal to 1,609.344 meters (m), the base unit for length. Statute mile equal to 5,280 feet or 1,760 yards (1.609344 km). [2]
The mile is classified as a US customary and imperial unit of length. Miles can be abbreviated as mi; for example, 1 mile can be written as 1 mi.
One statute mile is defined as 5,280 feet or 1,760 yards, which equals exactly 1,609.344 meters (1.609344 kilometers).
In practice, miles (mi) are widely used across large-scale industrial, bulk, and macro-level length specifications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting length between kilometers (km) and miles (mi), keep full floating-point precision (1 km = 0.6213712 mi; 1 mi = 1.609344 km) during intermediate calculations and round only the final mile figure to match your instrument tolerance.
More Kilometer & Mile Conversions
Need to calculate in the opposite direction? Use our miles to kilometers converter (mi to km) to switch your starting unit immediately. You can also explore related tools such as converting feet to miles, converting yards to miles, or converting kilometers to feet.
Frequently Asked Questions
References
- [1]NIST OWM StandardNIST OWM (SI Units — Length)·Length Metrology Standard — Kilometers (km) to Miles (mi)
- [2]BIPM SpecificationBIPM (SI Base Unit: Metre (m))·Unit Specifications: Kilometer (km) & Mile (Statute) (mi)
- [3]NIST HB 133 ReferenceNIST HB 133 (NIST Handbook 133 (2019 Ed.))·Conversion Factors & Mathematical Basis (km to mi)