Kilometers to Miles Converter
1 km equals 0.62137119 mi, and 1 mi equals 1.609344 km. Enter a value in either box to convert kilometers to miles and back. Formula: meters = value x unit factor (1 in = 0.0254 m exactly, 1 ft = 0.3048 m, 1 mi = 1609.344 m).
· CalcFlow Editorial
1 km = 0.62137119 mi
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
Kilometers to Miles Conversion Table
| Kilometers | Miles |
|---|---|
| 1 km | 0.62137119 mi |
| 2 km | 1.2427424 mi |
| 5 km | 3.106856 mi |
| 10 km | 6.2137119 mi |
| 25 km | 15.53428 mi |
| 50 km | 31.06856 mi |
| 100 km | 62.137119 mi |
| 500 km | 310.6856 mi |
| 1,000 km | 621.37119 mi |
Miles to Kilometers Conversion Table
| Miles | Kilometers |
|---|---|
| 1 mi | 1.609344 km |
| 2 mi | 3.218688 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 25 mi | 40.2336 km |
| 50 mi | 80.4672 km |
| 100 mi | 160.9344 km |
| 500 mi | 804.672 km |
| 1,000 mi | 1,609.344 km |
Worked example: 10 km = 6.2137119 mi. A person who is 180 cm tall is 180 / 2.54 = 70.87 inches, which is 5 feet and 10.87 inches. A 10 km run is 10 / 1.609344 = 6.21 miles.
Need other units? Open the full Length Converter.
Popular Length Conversions
Formula
meters = value x unit factor (1 in = 0.0254 m exactly, 1 ft = 0.3048 m, 1 mi = 1609.344 m)Understanding Length Conversion
Length is measured in the metric system (meters and its multiples) almost everywhere, while the United States still uses inches, feet, yards and miles for everyday distances. Since 1959 the inch has been defined as exactly 2.54 centimeters, so every imperial length converts to metric with an exact factor, not an approximation. This converter pivots every unit through the meter, which keeps results consistent no matter which pair you pick.
Tips and Best Practices
- 1Remember 1 inch = 2.54 cm exactly; multiply inches by 2.54 for centimeters and divide centimeters by 2.54 for inches.
- 2For a quick road estimate, 1 mile is about 1.6 km and 1 km is about 0.62 miles.
- 3Use the swap button when you want the reverse direction without retyping the number.
Real-World Example
A person who is 180 cm tall is 180 / 2.54 = 70.87 inches, which is 5 feet and 10.87 inches. A 10 km run is 10 / 1.609344 = 6.21 miles.
Common Mistakes to Avoid
- Mixing up the international mile (1609.344 m) with the nautical mile (1852 m), which is used at sea and in aviation.
- Treating feet and inches as one decimal number: 5 ft 10 in is 70 inches, not 5.10 feet.
- Rounding the factor too early. Convert first and round only the final answer.
How to Use
- Type a number in the Kilometers box.
- The Miles result appears instantly; you can also edit the Miles box to convert backwards.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many miles are in 1 km?
How many kilometers are in 1 mi?
What is the formula to convert kilometers to miles?
How many feet are in a mile?
Sources: NIST SP 811 (Guide for the Use of the International System of Units); BIPM SI Brochure; IAU 2012 Resolution B2 (light-year based on 299,792,458 m/s and the Julian year).