Speed Calculator
Calculate speed, distance or time when you know the other two values. Convert the result between common speed units.
Calculated Speed
50.00 km/h
km/h
50.00
m/s
13.89
mph
31.07
Speed Formula
Speed = Distance ÷ Time
To calculate distance, multiply speed by time. To calculate time, divide distance by speed.
- Speed: distance ÷ time
- Distance: speed × time
- Time: distance ÷ speed
Unit conversion: The calculator converts your inputs internally so that the result remains consistent even when you mix kilometres, metres, miles, hours, minutes or seconds.