The Formula
1 mph = 1.60934 km/h. To convert mph to km/h, multiply by 1.60934. To convert km/h to mph, multiply by 0.62137.
Quick mental estimate: Multiply mph by 1.6 to get a close approximation. For km/h to mph, multiply by 0.6 (slightly less accurate but fast).
20 Common Speed Conversions
| mph | km/h | Reference |
|---|---|---|
| 5 mph | 8.0 km/h | Brisk walking pace |
| 10 mph | 16.1 km/h | Slow jog / cycling |
| 15 mph | 24.1 km/h | Residential speed limit (some areas) |
| 20 mph | 32.2 km/h | UK urban / school zone limit |
| 25 mph | 40.2 km/h | US suburban speed limit |
| 30 mph | 48.3 km/h | UK urban speed limit |
| 35 mph | 56.3 km/h | US urban/rural road |
| 40 mph | 64.4 km/h | Rural road limit |
| 50 mph | 80.5 km/h | UK single carriageway limit |
| 55 mph | 88.5 km/h | US interstate minimum |
| 60 mph | 96.6 km/h | US highway, UK A-road limit |
| 65 mph | 104.6 km/h | US interstate standard |
| 70 mph | 112.7 km/h | UK motorway limit |
| 75 mph | 120.7 km/h | Some US states' highway max |
| 80 mph | 128.7 km/h | German Autobahn recommendation |
| 100 mph | 160.9 km/h | High-speed rail (moderate) |
| 130 mph | 209.2 km/h | Formula 1 average lap |
| 200 mph | 321.9 km/h | TGV train (France) |
| 500 mph | 804.7 km/h | Commercial aircraft cruise |
| 767 mph | 1,235 km/h | Speed of sound (sea level) |
Running and Cycling Pace
A 4-hour marathon requires an average pace of 6.55 mph (10.55 km/h). A competitive cyclist averages 20–25 mph (32–40 km/h). A serious runner doing interval training might hit 12–15 mph (19–24 km/h) for short bursts.
The speed converter below handles mph, km/h, knots, metres per second, and feet per second — convert any speed in any direction instantly.
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Speed Converter