Calculate
How to use this calculator
Choose the formula (if there is more than one), choose what you want to find, then fill in the other values using the units shown. The calculator rearranges the formula, puts your numbers in, and shows every step.
How it's calculated
Speed = distance ÷ time, so v = d / t, d = v × t and t = d / v.
Worked example
A bus travels 150 km in 2.5 hours. Speed = 150 ÷ 2.5 = 60 km/h.
Frequently asked questions
How do I change minutes to hours?
Divide the minutes by 60. 30 minutes is 0.5 hours.
What is average speed?
Total distance divided by total time.
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Last updated October 2026. Results are for learning and guidance; always check important work. Calculations run in your browser and are not stored.