Speed Converter
Convert between km/h, mph, m/s, knots, and Mach. Free online speed conversion tool with real-time results.
Quick:
Kilometers per Hour
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km/h
Miles per Hour
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mph
Meters per Second
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m/s
Knots
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kn
Mach Number
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Mach (speed of sound)
📐 Speed Reference
Base Unit: km/h
All conversions are based on kilometers per hour.
| 1 mph | = 1.60934 km/h |
| 1 m/s | = 3.6 km/h |
| 1 knot | = 1.852 km/h |
| 1 Mach | = 1225 km/h |
🚀 Real World Speeds
| 🚶 Walking | 5 km/h | 3.1 mph |
| 🏃 Running | 15 km/h | 9.3 mph |
| 🚗 City driving | 50 km/h | 31 mph |
| 🛣️ Highway | 120 km/h | 75 mph |
| 🚄 Bullet train | 300 km/h | 186 mph |
| ✈️ Airliner | 900 km/h | 560 mph |
| 🎯 Sound barrier | 1225 km/h | 761 mph |
📋 Common Speed Limits
- City: 50 km/h (31 mph)
- Highway: 100-130 km/h (62-81 mph)
- 1 knot = 1 nautical mile/hour
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