Calculate speed, distance, or time using the formula: Speed = Distance / Time. Supports multiple units.
Enter values to calculate.
| Object | Speed |
|---|---|
| Walking | 5 km/h |
| Cycling | 15 km/h |
| City car | 50 km/h |
| Highway car | 100 km/h |
| Bullet train | 320 km/h |
| Speed of sound | 1234 km/h |
| Commercial jet | 900 km/h |
| Speed of light | 1.08×10⁹ km/h |
Calculate speed, distance, or time instantly with our free calculator, solving for whichever value you need based on the other two.
Speed = Distance ÷ Time. This calculator rearranges the formula to solve for any of the three variables: Distance = Speed × Time, or Time = Distance ÷ Speed.
Most versions support common units like mph, km/h, and m/s, with conversion between them; check your specific calculator's unit options.
Average speed = Total Distance ÷ Total Time, not simply the average of each segment's speed, since segments may cover different distances or take different times.
Speed is a scalar (magnitude only); velocity is a vector that includes direction, in everyday calculations like this, "speed" is typically what's being measured.
This calculator assumes constant speed over the given distance/time; for changing speeds, you'd need calculus-based instantaneous speed calculations instead.