Speed Calculator
Calculate speed, distance, or time. Enter any two values and the calculator solves the third, then shows conversions and running pace.
What is speed
Speed is the rate of change of distance with respect to time. The base formula is speed equals distance divided by time.
How to calculate distance
Distance equals speed multiplied by time. Choose Distance mode, enter speed and time, and the tool returns the distance in your selected unit.
How to calculate time
Time equals distance divided by speed. The result is displayed as hours, minutes, and seconds for readability.
Common speed units
The most used units are m/s, km/h, mph, and knots. The conversions list shows all four so you can compare across systems quickly.
Running pace explained
Pace is the time to cover one kilometre or one mile. The results include minutes per kilometre and minutes per mile whenever a non‑zero speed is present.
Practical tips
Use consistent units and realistic precision. Enter distance and time that reflect the same scenario, avoid mixing start and stop times, and round inputs to the precision you need.
Speed calculator FAQs
How do I calculate speed?
Divide distance by time, then convert to the target unit if needed.
How do I calculate distance?
Multiply speed by time and choose your distance unit for the result.
How do I calculate time?
Divide distance by speed. The result displays as hours, minutes, and seconds.
Which units does the tool support?
It supports metres, kilometres, miles, nautical miles, yards, feet, and speeds in m/s, km/h, mph, and knots.
Does the tool show pace for running?
Yes. It shows minutes per kilometre and minutes per mile whenever speed is greater than zero.