Length conversions across systems.
Type a value, pick units
6.2137
1 km = 0.6214 mi
Cross-system length
- 1 in = 2.54 cm (exact) · 1 ft = 30.48 cm · 1 mi ≈ 1.609 km.
- 1 cm ≈ 0.394 in · 1 m ≈ 3.28 ft · 1 km ≈ 0.621 mi.
- Quick road trick: km × 0.6 ≈ miles; miles × 1.6 ≈ km.
Your turn
A road sign says 80 km/h. Roughly what is that in mph?
Watch out
1 inch is 2.54 cm, not 2.4 — and the metre is about 3.28 ft, not 3 ft. Small slips here compound on long distances.
Conversions
- 1 cm ≈ 0.394 in
- 1 m ≈ 3.28 ft
- 1 km ≈ 0.621 mi