Calculating Speed: Formula, Distance, and Time
Learn how to calculate speed from distance and time, with examples in mph, km/h, and meters per second.
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Searching calculating speed usually means you want the basic motion formula.
Speed Formula
Speed = Distance / Time
Example
If you travel 120 miles in 2 hours:
120 / 2 = 60 mph
If you run 400 meters in 80 seconds:
400 / 80 = 5 meters per second
Unit Reminder
The speed unit depends on the distance and time units you use:
- miles per hour
- kilometers per hour
- meters per second
The Bottom Line
To calculate speed, divide distance by time. Keep your units consistent so the answer is easy to interpret.
How to Calculate: Step-by-Step Guide
1
Measure distance
Use miles, kilometers, meters, or another distance unit.
2
Measure time
Use hours, minutes, or seconds and convert if needed.
3
Divide distance by time
Speed is the distance traveled per unit of time.
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