Length Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
Miles to Kilometers
1.609344 km
1 mi = 1.609344 km
Show 1 mi in every unit
| Unit | Value |
|---|---|
| Millimeters | 1,609,344 mm |
| Centimeters | 160,934.4 cm |
| Meters | 1,609.344 m |
| Kilometers | 1.609344 km |
| Inches | 63,360 in |
| Feet | 5,280 ft |
| Yards | 1,760 yd |
| Nautical miles | 0.868976 nmi |
Type a value, choose the unit you have and the unit you want, and the result updates as you type. Metric and imperial units sit in the same list, so you can go from miles to kilometers or from feet and inches to centimeters without looking up a factor.
The imperial units are defined exactly in terms of the meter, so the conversions here are exact rather than rounded rules of thumb.
How length converter works
Every value is first converted to meters, then from meters to the target unit. One inch is defined as exactly 2.54 centimeters, and one mile as exactly 1,609.344 meters.
Use the swap button to reverse the direction. Results are shown to as many useful decimal places as the number needs, without trailing zeros.
The formula
Result = Value × (factor of source unit ÷ factor of target unit)
1 in = 2.54 cm · 1 ft = 0.3048 m · 1 yd = 0.9144 m · 1 mi = 1,609.344 mWorked example: converting a marathon and a height
A marathon is 42.195 km. In miles: 42.195 × 1,000 ÷ 1,609.344 = 26.219 miles.
A height of 5 ft 9 in is 69 inches, and 69 × 2.54 = 175.26 cm.
Quick reference
| From | To |
|---|---|
| 1 inch | 2.54 cm |
| 1 foot | 30.48 cm (0.3048 m) |
| 1 yard | 0.9144 m |
| 1 mile | 1.609344 km |
| 1 kilometer | 0.621371 miles |
| 1 meter | 3.28084 feet |
| 1 nautical mile | 1.852 km |
When to use this converter
- Converting distances on road signs and running routes.
- Turning heights, room sizes and furniture dimensions between systems.
- Reading product specs and technical drawings that use a different unit.
- Checking homework on unit conversion.
Common mistakes to avoid
- Mixing up statute and nautical miles. A nautical mile is about 15% longer.
- Converting feet and inches as a decimal: 5 ft 9 in is 5.75 ft, not 5.9 ft.
- Rounding too early in a multi-step calculation. Convert once from the original value.
Frequently asked questions
- How many kilometers are in a mile?
- One mile is exactly 1.609344 kilometers.
- How do I convert feet and inches to centimeters?
- Convert everything to inches (feet × 12 + inches), then multiply by 2.54. 5 ft 9 in is 69 in, which is 175.26 cm.
- Is the conversion exact?
- Yes. The inch, foot, yard and mile are defined in terms of the meter, so the factors are exact.
- What is a nautical mile?
- It is 1,852 meters and is used in sea and air navigation.
Learn more
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Results are for information only and are not financial, legal or medical advice. The calculation logic is covered by automated tests, and examples on this page are worked out and re-checked before publishing. Spotted a mistake? Tell us.