Practical tools for measured work
Speed distance time calculator
Solve speed, distance or time with explicit length, speed and duration units.
Calculate the layout, check the diagram, then print the result for the shop or jobsite.
How it works
Choose the unknown and provide the other two quantities. Distance = speed × time; speed = distance / time; time = distance / speed. Units are converted through metres and seconds. Travelling 100 km in 2 hours gives 50 km/h.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Solve for
- Speed
- Distance
- 100
- Distance unit
- Kilometres
- Speed unit
- Kilometres per hour
- Time
- 2
- Time unit
- Hours
Primary result: Speed: 50.
Before using the result
- Check the selected mode, units and input values before using the result.
- Read the assumptions and rounding rules; compare the worked example with your intended calculation.
- A numerical result does not supply missing context or change the stated limitations.
Limitations
Assumes constant speed or a whole-trip average. Time excludes no stops automatically; include stops yourself when calculating a trip average. Distance and time must be nonnegative, and a divisor must be positive. This is not a route planner.
Frequently asked questions
What is the difference between speed and velocity?
Average speed is total path length divided by elapsed time. Average velocity is signed displacement divided by elapsed time. Returning to the starting point gives zero average velocity even after travelling a nonzero distance.
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