Miles per hour to Kilometres per hour
Convert miles per hour to kilometres per hour instantly.
Miles per hour to Kilometres per hour (mph to km/h) Converter
1 mile per hour = 1.6093 kilometres per hour
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- 1 mph = 1.6093 km/h
- 5 mph = 8.0467 km/h
- 10 mph = 16.093 km/h
- 25 mph = 40.234 km/h
- Kilometres per hourkm/h
- Miles per hourmph
- Kilometres per hourkm/h
- Miles per hourmph
How it’s calculated
km/h = mph × 1.609344
- Multiply the value in miles per hour by 1.609344.
- To go back, divide by 1.609344 (or multiply by 0.6213711922).
- 1 mph = 1.609344 km/h · 1 km/h = 0.6213711922 mph
Quick examples
1 mile per hour = 1.6093 kilometres per hour · 1 km/h = 0.62137 mph
- 1 mile per hour = 1.6093 kilometres per hour
- 5 miles per hour = 8.0467 kilometres per hour
- 10 miles per hour = 16.093 kilometres per hour
- 25 miles per hour = 40.234 kilometres per hour
- 100 miles per hour = 160.93 kilometres per hour
Miles per hour to kilometres per hour conversion table
| Miles per hour (mph) | Kilometres per hour (km/h) |
|---|---|
| 0.1 mph | 0.16093 km/h |
| 0.5 mph | 0.80467 km/h |
| 1 mph | 1.6093 km/h |
| 2 mph | 3.2187 km/h |
| 3 mph | 4.828 km/h |
| 4 mph | 6.4374 km/h |
| 5 mph | 8.0467 km/h |
| 6 mph | 9.6561 km/h |
| 7 mph | 11.265 km/h |
| 8 mph | 12.875 km/h |
| 9 mph | 14.484 km/h |
| 10 mph | 16.093 km/h |
| 15 mph | 24.14 km/h |
| 20 mph | 32.187 km/h |
| 25 mph | 40.234 km/h |
| 30 mph | 48.28 km/h |
| 40 mph | 64.374 km/h |
| 50 mph | 80.467 km/h |
| 75 mph | 120.7 km/h |
| 100 mph | 160.93 km/h |
| 250 mph | 402.34 km/h |
| 500 mph | 804.67 km/h |
| 1,000 mph | 1,609.3 km/h |
About these units
Mile per hour (mph)
US & imperial (identical)
1 mph = 0.44704 m/s (exact)
Defined as exactly 0.44704 m/s.
Source: NIST SP 811 / Handbook 44
Kilometre per hour (km/h)
metric (non-SI)
1 km/h ≈ 0.27777778 m/s
Source: BIPM SI Brochure (9th ed.) (SI prefixes and accepted units)
Frequently asked questions
How do I convert miles per hour to kilometres per hour?
Use km/h = mph × 1.609344. Multiply the value in miles per hour by 1.609344.
How many kilometres per hour are in 1 mile per hour?
1 mile per hour (mph) equals 1.6093 kilometres per hour (km/h); more precisely 1.609344.
How many miles per hour are in 1 kilometre per hour?
1 kilometre per hour (km/h) equals 0.62137 miles per hour (mph); more precisely 0.6213711922.
What is 10 mph in km/h?
10 miles per hour = 16.093 kilometres per hour.
What is a mile per hour?
Defined as exactly 0.44704 m/s.
Related conversions
Formula: km/h = mph × 1.609344. Factors last reviewed 2026-10-27.