Speed, distance and time calculator
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- Speed = distance ÷ time.
| Inputs | Answer |
|---|---|
| Find: Speed; Speed: 60; Distance: 150; Time: 2.5 | Speed = 150 ÷ 2.5 = 60 per hour. |
| Find: Distance; Speed: 65; Distance: 0; Time: 3.5 | Distance = 65 × 3.5 = 227.5. |
| Find: Time; Speed: 45; Distance: 120; Time: 1 | Time = 120 ÷ 45 = 2.667 hours (2 h 40 min). |
How to use it
Speed = distance ÷ time, distance = speed × time and time = distance ÷ speed. 150 km in 2.5 hours is 60 km/h. Use the same distance unit throughout (kilometres with km/h, miles with mph) and time in hours.
To convert km/h to m/s divide by 3.6.
Frequently asked questions
How do I calculate speed?
Divide distance by time.
How long does 150 km take at 60 km/h?
2.5 hours.
How do I convert km/h to mph?
Divide by 1.609344.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
Written by Calculators Free Editorial Team · Data checked 2026-11-12
About · How we verify this · Editorial policy · Corrections
About · How we verify this · Editorial policy · Corrections
General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.