Speed Converter
Convert between meters per second (m/s), kilometers per hour (km/h), miles per hour (mph), knots, feet per second (ft/s), Mach, and more. Ideal for physics, engineering, aviation, maritime, and everyday use. No signup, no uploads — all local.
62.14
mph
Common conversions (100 km/h)
| Unit | Value |
|---|---|
| Meters per Second | 27.78 |
| Kilometers per Hour | 100 |
| Miles per Hour | 62.14 |
| Knots | 53.99 |
| Feet per Second | 91.13 |
| Mach | 0.081 |
Why use this speed converter?
Speed is measured differently across contexts: km/h for road traffic in most countries, mph in the US and UK, knots in aviation and maritime, m/s in physics, and Mach for high-speed flight. This tool makes it easy to switch between all of them.
- Instant conversion – results update as you type or change units.
- 6 common units – m/s, km/h, mph, knots, ft/s, and Mach.
- Copy result – one click copies the converted value.
- Swap units – quickly reverse the conversion direction.
- 100% private – calculations happen locally in your browser.
How to convert speed units
1. Enter a value
Type any number into the value box.
2. Choose units
Select the unit you're converting from and the unit you want to convert to.
3. Get result
The converted value appears instantly. Use the copy button or swap direction.
Frequently asked questions
Yes, 100% free. No hidden charges or signups.
Mach 1 is the speed of sound at sea level, approximately 1,225 km/h (761 mph). The exact value varies with altitude and temperature.
No. All calculations happen in your browser. Your input never leaves your device.
Yes, knots are included in the unit list. 1 knot equals 1.852 km/h exactly.