Speed Converter
Convert speed instantly across 6 units — type once, see every conversion update live.
⚡ Instant results
🌐 6 units supported
🆓 100% free, no sign-up
Converted to every unit:
📌 Quick Reference — Common Conversions
1 km/h0.621371 mph
1 mph1.60934 km/h
1 m/s3.6 km/h
1 knot1.852 km/h
1 mph0.44704 m/s
100 km/h62.14 mph
1 Mach1234.8 km/h
1 ft/s0.3048 m/s
❓ Frequently Asked Questions
How do I convert km/h to mph?
Multiply by 0.621371. For example, 100 km/h × 0.621371 = 62.14 mph.
How do I convert mph to km/h?
Multiply by 1.60934. For example, 60 mph × 1.60934 = 96.56 km/h.
What is a knot?
A knot is 1 nautical mile per hour, equal to 1.852 km/h — used in maritime and aviation navigation.
What is Mach speed?
Mach 1 is the speed of sound, approximately 343 m/s (1,235 km/h or 767 mph) at sea level in standard conditions — it varies slightly with altitude and temperature.
Instant & live
Every unit updates as you type — no "Convert" button, no waiting.
6 units supported
Metric, imperial, nautical, and Mach — from m/s to the speed of sound.
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