Kilometers to Miles Converter (km to miles)
Convert kilometers (km) to miles or miles to kilometers using the exact international mile. Includes common values such as 44.7 km and 446 km.
How it works
Kilometers ÷ 1.609344 = miles. Miles × 1.609344 = kilometers.
Formula / calculation method
miles = kilometers ÷ 1.609344kilometers = miles × 1.609344
Worked examples
- 5 km is approximately 3.10686 miles.
- 10 miles equals exactly 16.09344 km before display rounding.
- 44.7 km is approximately 27.7750 miles.
- 446 km is approximately 277.13155 miles.
Miles to kilometers (miles to km)
This same canonical calculator handles the reverse miles-to-kilometers conversion. Choose Miles in the Convert from selector or use Swap units, then multiply miles by exactly 1.609344.
- 1 mile = 1.609344 km exactly.
- 5 miles = 8.04672 km.
- 10 miles = 16.09344 km.
When this tool helps
Useful for driving distances, running and cycling routes, maps, travel planning, pace references, and international road information.
Related calculations: meters to feet, KPH to MPH, and millimeters to inches.
Browse this topic: Length & Distance Converters · Length & Distance Standards Guide.
Quick reference
| Input | Result |
|---|---|
| 1 km | 0.62137 mi |
| 5 km | 3.10686 mi |
| 10 km | 6.21371 mi |
| 1 mi | 1.609344 km |
| 5 mi | 8.04672 km |
| 10 mi | 16.09344 km |
| 44.7 km | 27.7750 mi |
| 446 km | 277.13155 mi |
Accuracy and definitions
The international mile is exactly 1,609.344 meters, so 1 mile equals exactly 1.609344 kilometers.
Reference standards
Where a published measurement definition applies, Solveberry links to primary standards rather than relying only on secondary converter sites.
- NIST Guide to the SI — Appendix B.8 conversion factors
- BIPM SI Brochure — International System of Units
Methodology & verification
- Method
- Kilometers ÷ 1.609344 = miles. Miles × 1.609344 = kilometers.
- Verification
- The displayed formula is cross-checked against Solveberry regression cases before release. Calculator inputs and results stay in the browser.
- Last reviewed
- 2026-08-19
Results are calculated locally in your browser. Optional analytics do not include calculator input values or results.
Common questions
How many kilometers are in one mile?
Exactly 1.609344 kilometers.
Why is 5 km often described as 3.1 miles?
3.1 miles is a convenient rounded value; the more precise conversion is about 3.10686 miles.
Can I convert in the opposite direction on this page?
Yes. Use the “Convert from” selector or Swap units button; Solveberry keeps both directions on one canonical page.
Why can my result differ slightly from another converter?
Differences usually come from rounding or from selecting a different regional measurement standard. Solveberry shows the factor or standard used on the page.