mechanics
Average Speed Calculator
Solve average speed, distance, or elapsed time.
Calculator
Formula
v = d / t
- v — Average speed
- m/s · km/h
- d — Distance
- m · cm · mm · km
- t — Elapsed time
- s · min · h
Assumptions and limits
- Speed is averaged over the full distance and elapsed time.
Example
Travel 150 km in 2 hours
Choose “Load example” in the calculator to restore these inputs and see the complete steps.
Sources
- University Physics Volume 1 — OpenStax
Frequently asked questions
Are my inputs uploaded?
No. This calculator runs locally in your browser. Inputs are placed in a URL only when you explicitly copy a share link.
Why are units converted first?
Canonical units prevent scale errors when inputs use mixed units. The result is converted back to your selected output unit afterward.
Does the result replace professional judgment?
No. The result applies only to the stated model and assumptions. Qualified people should review high-risk engineering, medical, or laboratory decisions.