Speed Converter
Convert between km/h, mph, m/s and knots instantly. Perfect for travel and science.
🚀 Speed Converter
Speed Converter — Free Online Speed Unit Converter
Convert between all common speed units instantly with our free online converter. Miles per hour, kilometres per hour, metres per second, knots, feet per second — enter a value in any unit and see all conversions at once. No account required. Speed unit conversion is essential for drivers, pilots, sailors, scientists, athletes, and anyone working...
Convert between all common speed units instantly with our free online converter. Miles per hour, kilometres per hour, metres per second, knots, feet per second — enter a value in any unit and see all conversions at once. No account required.
Speed unit conversion is essential for drivers, pilots, sailors, scientists, athletes, and anyone working across different measurement systems. The US and UK use miles per hour for road speeds while most countries use km/h. Aviation and maritime navigation use knots. Physics uses metres per second. Our converter handles all of these.
Supported Speed Units
- Miles per hour (mph) — US/UK road speed standard
- Kilometres per hour (km/h or kph) — international standard
- Metres per second (m/s) — scientific standard
- Knots (kn) — maritime and aviation
- Feet per second (fps) — US engineering
- Mach number — supersonic speed
Common Speed Conversions
- 60 mph = 96.56 km/h
- 100 km/h = 62.14 mph
- 1 knot = 1.852 km/h = 1.151 mph
- 1 m/s = 3.6 km/h = 2.237 mph
- Speed of sound (Mach 1) ≈ 343 m/s = 1,235 km/h = 767 mph
How to Convert Speed Units — Step by Step
- Select input unit: Choose the speed unit of your value.
- Enter speed: Type the speed value you want to convert.
- View all results: All units update simultaneously and instantly.
- Copy any value: Click a result to copy it to clipboard.
- Convert another: Change the input for a new conversion.
❓ Frequently Asked Questions
Multiply mph by 1.60934. For example, 60 mph × 1.60934 = 96.56 km/h.
A knot is one nautical mile per hour (1.852 km/h). It's used internationally in aviation and maritime contexts.
Mach 1 is the speed of sound, approximately 343 m/s (1,235 km/h / 767 mph) at sea level at 20°C. It varies with altitude and temperature.
Nearly — 100 km/h = 62.14 mph. A common approximation is that 100 km/h ≈ 60 mph (about 3.6% less).
Yes, 100% free with no account required.
Yes — the tool includes Mach number and km/s for high-speed calculations. The speed of light (299,792 km/s) can also be explored.
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