Speed, Distance & Time Calculator

About this tool

Solve for speed, distance, or time using the classic formula speed = distance ÷ time. Pick which value you want to solve for, fill in the other two, and get an instant result — handy for physics homework, trip planning, or pace calculations.

Frequently asked questions

What units does this use?

Kilometers, hours, and km/h throughout, for consistency — convert your inputs to these units first if they're in miles, minutes, or another unit.

How is "time" solved for?

Using time = distance ÷ speed, the rearranged form of the same core formula.

What if I enter a speed of zero when solving for time?

The result shows a hint instead of a calculation, since dividing by zero speed would mean infinite time — not a meaningful answer.