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How to use this converter
Enter a signed decimal where allowed, then select Convert or press Enter. Comma decimals and expressions are rejected rather than guessed. Copy produces a plain conversion statement without promotional text.
Definition and review
Constants follow NIST Guide to the SI, Appendix B.8. Values are calculated locally; raw numbers are not uploaded, stored, placed in URLs, or included in analytics.
What a 5K means in miles
A 5K is exactly 5 kilometers, or 5,000 meters. Using the international mile definition, it equals 3.106855961 miles and is commonly described for race planning as 3.1 miles. This page keeps that race-distance context separate from the generic calculator.
Useful markers: 1 km = 0.6213711922 mi; 2 km = 1.242742384 mi; 3 km = 1.864113577 mi; 4 km = 2.485484769 mi; 5 km = 3.106855961 mi.
Common kilometers conversions
| Kilometers (km) | Miles (mi) |
|---|---|
| 1 km | 0.6213711922 mi |
| 2 km | 1.242742384 mi |
| 3 km | 1.864113577 mi |
| 4 km | 2.485484769 mi |
| 5 km | 3.106855961 mi |