🚗 Speed Distance Time Calculator

About this Speed Distance Time Calculator

This speed, distance and time calculator solves the classic triangle formula — distance = speed × time — for whichever value is missing. Enter any two of distance (km), speed (km/h) and time (hours) and it finds the third, with the time also shown in minutes and the speed in metres per second.

How to use it

1. Fill in the two values you know.
2. Leave the box for the value you want completely blank.
3. Click Calculate the missing value.

Example

Driving 150 km at 50 km/h takes 150 ÷ 50 = 3 hours; leave the time box blank and enter the other two to get that answer.

Frequently asked questions

Which units does it use?

Kilometres, kilometres per hour and hours — the units used on most road signs and in school physics. The result also shows m/s and minutes.

What if I fill in all three?

It checks your three numbers against each other instead, so you can verify a journey you have already worked out.

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