How to use the average speed calculator
Compute average speed from distance and time and convert to km/h and mph. Enter distance, time in the fields above; the speed, speed, speed are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- d — Distance (m)
- t — Time (s)
Worked example
With distance = 100 m, time = 9.58 s, the calculator gives speed ≈ 10.43841 m/s; speed ≈ 37.57829 km/h; speed ≈ 23.35006 mph.
Frequently asked questions
What is the formula for the average speed calculation?
Speed (m/s) = d / t. Speed (km/h) = [Speed] × 3.6. Speed (mph) = [Speed] × 2.236936. Here d is distance (m), t is time (s).
What inputs do I need for the average speed calculator?
You need distance in m, time in s. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.