Speed, Distance & Time Calculator

Calculate speed, distance or time — enter any two and get the third, in km/h, mph or m/s.

How do you calculate speed, distance and time?

Speed = distance ÷ time, distance = speed × time and time = distance ÷ speed. Travelling 100 km in 2 hours is 50 km/h; at 50 km/h, 100 km takes 2 hours.

Remember it

Draw a triangle with D on top and S and T below: cover the value you want — D = S × T, S = D ÷ T, T = D ÷ S.

Frequently asked questions

How do I convert km/h to m/s?

Divide by 3.6 — 36 km/h is 10 m/s.

Can I get the time in hours and minutes?

Yes, it is shown as h:mm too.

Is it free?

Yes.