Speed Calculator
Calculate speed, distance, or travel time — pick what you want to find.
Speed, distance, and time formula
The relationship between speed, distance, and time is: Speed = Distance ÷ Time. Rearranged: Distance = Speed × Time and Time = Distance ÷ Speed. Enter any two values and the calculator finds the third.
Frequently asked questions
How do I convert km/h to mph?
1 km/h = 0.621371 mph. The calculator shows both units automatically when you switch between km and miles mode.
What if my journey has stops?
This calculator uses average speed over the total distance. For journeys with stops, exclude stop time from the time input, or use total elapsed time and accept that average speed will be lower than moving speed.
