Speed Distance Time Calculator
Pick what you want to find, enter the other two values, and get an instant result.
Speed
60
The Speed Formula
Speed = distance ÷ time.
Worked example
A trip covers 150 miles in 2.5 hours.
150 ÷ 2.5 = 60
Speed: 60 mph
Frequently Asked Questions
What is the speed, distance, time formula?
Speed = distance ÷ time. Rearranged, distance = speed × time, and time = distance ÷ speed.
How do you find average speed for a trip with different speeds?
Average speed is total distance divided by total time, not a simple average of the individual speeds — this matters most when the same speeds are held for different amounts of time.
What units should I use?
Any units work as long as they're consistent — miles and hours, kilometers and hours, or meters and seconds all give a valid speed, as long as distance and time use matching units.
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