Kilometers to Miles Converter km → mi
1 kilometer (km) = 0.6213711922 miles (mi). Type a value below — the conversion happens instantly, entirely on your device.
1 km = 0.6213711922 mi
42.195 kilometers = 26.218757 miles
42.195 × 0.621371 = 26.218757
1 km equals 0.621371 mi, so multiplying by 0.621371 converts the value. The result describes the exact same quantity — only the measuring stick changes.
How to convert kilometers to miles
miles = kilometers × 0.6213711922 — multiply the kilometer value by 0.621371.
Example: 42.195 km = 26.2188 mi.
To convert the other way: kilometers = miles ÷ 0.6213711922 — or use the dedicated mi to km converter .
Kilometers-to-miles is the classic travel and running conversion. A marathon of 42.195 km equals 26.22 miles. A quick mental trick: multiply kilometers by 0.6 for a close estimate (the exact factor is 0.621371).
Kilometers to Miles conversion table
| Kilometers (km) | Miles (mi) |
|---|---|
| 0.1 | 0.062137119 |
| 0.25 | 0.1553428 |
| 0.5 | 0.3106856 |
| 1 | 0.62137119 |
| 2 | 1.2427424 |
| 3 | 1.8641136 |
| 4 | 2.4854848 |
| 5 | 3.106856 |
| 6 | 3.7282272 |
| 7 | 4.3495983 |
| 8 | 4.9709695 |
| 9 | 5.5923407 |
| 10 | 6.2137119 |
| 15 | 9.3205679 |
| 20 | 12.427424 |
| 25 | 15.53428 |
| 30 | 18.641136 |
| 40 | 24.854848 |
| 50 | 31.06856 |
| 75 | 46.602839 |
| 100 | 62.137119 |
| 250 | 155.3428 |
| 500 | 310.6856 |
| 1000 | 621.37119 |
About the units
What is a kilometer?
A kilometer (km) is 1,000 meters. It is the standard unit for road distances and geographic measurements in most countries; 1 km equals about 0.621 miles.
What is a mile?
A mile (mi) is an imperial unit equal to 5,280 feet or exactly 1,609.344 meters. It remains the standard road-distance unit in the United States and the United Kingdom.
Frequently asked questions
How many miles are in 1 kilometer?
1 kilometer (km) = 0.6213711922 miles (mi).
What is the formula to convert kilometers to miles?
miles = kilometers × 0.6213711922 — multiply the kilometer value by 0.621371.
How do I convert km to mi without a calculator?
Multiply by 0.621 for a close estimate. Exact factor: 1 km = 0.6213711922 mi.
Is this km-to-mi converter accurate and private?
Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.
How many miles is a 5K and a 10K run?
A 5K is 3.11 miles and a 10K is 6.21 miles, using the exact factor 1 km = 0.621371 miles.
Related conversions
- Miles to Kilometers (mi → km)
- Centimeters to Inches (cm → in)
- Inches to Centimeters (in → cm)
- Millimeters to Inches (mm → in)
- Inches to Millimeters (in → mm)
- Feet to Meters (ft → m)
- Meters to Feet (m → ft)
- Centimeters to Feet (cm → ft)
- Feet to Centimeters (ft → cm)
- Inches to Feet (in → ft)
- All length & distance converters →