Speed Converter
Convert between different speed units including miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), knots, and more.
Speed Converter
Convert between various speed units. All conversions are based on standard international units.
Result
Enter a value and click "Convert" to see the result
Understanding Speed Conversions
Speed conversion is essential for understanding velocity measurements across different systems. The base unit is meters per second (m/s).
Common Speed Units:
- m/s (Meters per second): Base SI unit for speed
- km/h (Kilometers per hour): Common in metric countries, 1 km/h = 0.2778 m/s
- mph (Miles per hour): Used in US and UK, 1 mph = 0.447 m/s
- Knots: Nautical miles per hour, used in aviation and maritime, 1 knot = 0.514 m/s
- ft/s (Feet per second): Common in engineering, 1 ft/s = 0.3048 m/s
Common Conversions:
- 1 mph = 1.60934 km/h
- 1 km/h = 0.621371 mph
- 1 m/s = 3.6 km/h
- 1 knot = 1.852 km/h
- 1 mph = 0.868976 knots
Frequently Asked Questions
How do I convert km/h to mph?
Divide the km/h value by 1.609. So 100 km/h ≈ 62 mph. To go from mph to km/h, multiply by 1.609.
How many meters per second is 100 km/h?
100 km/h equals about 27.78 m/s. To convert km/h to m/s, divide by 3.6.
What is a knot?
A knot is one nautical mile per hour, about 1.852 km/h or 1.151 mph. It is used in aviation and maritime navigation.
How fast is the speed of sound?
The speed of sound in air at sea level is about 343 m/s, or roughly 1,235 km/h (767 mph). It varies with temperature and altitude.