Speed Calculator & Converter
Calculate speed, distance, or time using the speed equation. Convert between different speed units instantly.
Speed Calculator
speed = distance ÷ time
Enter any two values to calculate the third
Speed Converter
Converted result will appear here
Understanding Speed Calculation
Speed Formula
Speed is calculated by dividing the distance traveled by the time taken: speed = distance ÷ time.
Example: If you travel 150 km in 2 hours, your speed is 150 ÷ 2 = 75 km/h.
Common Speed Units
- km/h: Kilometers per hour (used worldwide)
- mph: Miles per hour (used in US and UK)
- m/s: Meters per second (scientific use)
- knots: Nautical miles per hour (aviation and maritime)
Conversion Factors
- 1 km/h = 0.621371 mph
- 1 mph = 1.60934 km/h
- 1 m/s = 3.6 km/h
- 1 knot = 1.15078 mph
- 1 ft/s = 0.681818 mph