Quick Conversions
100 km/h = 62.1 mph
Highway speed conversion
60 mph = 96.6 km/h
US to metric speed
10 m/s = 36 km/h
Running speed
500 knots = 575 mph
Aircraft speed
Mach 1 = 1,235 km/h
Speed of sound
Speed of light = 3×10⁸ m/s
Ultimate speed limit
Speed Visualization
Enter speed above to see on speedometer
🚶
Walking
~5 km/h / 3.1 mph
Average human walking
🚴
Cycling
~25 km/h / 15.5 mph
Recreational cycling
🏃
Marathon Runner
~21 km/h / 13 mph
Elite marathon pace
🚗
Highway Driving
~120 km/h / 75 mph
Typical highway speed
🚄
High-Speed Train
~300 km/h / 186 mph
Bullet train speed
✈️
Commercial Jet
~900 km/h / 559 mph
Cruising altitude
Mach Numbers & Supersonic Speeds
Mach 1
Speed of Sound
1,235 km/h / 767 mph
Mach 2
Supersonic
2,470 km/h / 1,534 mph
Mach 5
Hypersonic
6,174 km/h / 3,836 mph
Mach 25
Re-entry Speed
30,870 km/h / 19,180 mph
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Common Speed Conversions Reference
| Speed |
m/s |
km/h |
mph |
Context |
| Walking |
1.4 m/s |
5 km/h |
3.1 mph |
Average human walking pace |
| Running |
5 m/s |
18 km/h |
11.2 mph |
Moderate jogging speed |
| Cycling |
7 m/s |
25 km/h |
15.5 mph |
Recreational cycling |
| City driving |
14 m/s |
50 km/h |
31 mph |
Urban speed limit |
| Highway |
33 m/s |
120 km/h |
75 mph |
Highway cruising speed |
| High-speed train |
83 m/s |
300 km/h |
186 mph |
Bullet train |
| Commercial jet |
250 m/s |
900 km/h |
559 mph |
Cruising speed |
| Sound |
343 m/s |
1,235 km/h |
767 mph |
Mach 1 at sea level |