Quick answer

How do I convert km to miles?

1 km = 0.621 miles · 1 mile = 1.609 km · A 5K = 3.1 miles · A marathon = 42.2 km / 26.2 miles.

📏 KM ↔ Miles

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Quick reference

1 km = 0.621 mi · 5 km = 3.11 mi · 10 km = 6.21 mi · 100 km = 62.14 mi
1 mi = 1.609 km · 5 mi = 8.05 km · 10 mi = 16.09 km · 100 mi = 160.93 km
Race distances: 5K = 3.1 mi · 10K = 6.2 mi · Half marathon = 13.1 mi (21.1 km) · Marathon = 26.2 mi (42.2 km)

Reviewed by: Montreal Tips editorial team · Last updated: May 13, 2026

Note: Estimates only — verify with official sources before booking.