How-to guides · 3 min read
Speed, Distance and Time Formula: Examples and Average Speed
The three formulas
- speed = distance ÷ time
- distance = speed × time
- time = distance ÷ speed
60 km/h for 2.5 hours
Step-by-step working 1 steps
- 1distance = speed × time
60 × 2.5 = 150
Keep the units consistent
If speed is in km/h, time must be in hours. 30 minutes is 0.5 hours. To convert km/h to m/s divide by 3.6.
90 km at 60 km/h
- If hours: 1 h 30 min
Step-by-step working 2 steps
- 1time = distance ÷ speed
90 ÷ 60 = 1.5
- 2If the time unit is hours
1.5 h = 1 h 30 min
Average speed on a round trip
Drive 120 km out at 60 km/h and back at 40 km/h. Times: 2 h and 3 h, total 5 h for 240 km, so the average is 48 km/h — not 50.
Related tools
Use the speed, distance and time calculator and the unit converter.
Frequently asked questions
How do I convert minutes to hours?
Divide by 60: 45 minutes is 0.75 hours.
What is average speed?
Total distance divided by total time.
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