Speed, Distance & Time Calculator
Solve for speed, distance or time by entering any two values, useful for travel planning and physics problems, free in your browser.
Enter Values
Minimum 0
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter any two of speed, distance or time.
- Press Calculate for the third.
How it works
The three are linked by distance = speed × time. Enter any two and the calculator rearranges to find the third (speed = distance ÷ time, or time = distance ÷ speed).
Worked example
60 km/h for 2 hours. Distance = 60 × 2 = 120 km.
Common mistakes
- Mixing units — keep distance, speed and time consistent (km with km/h and hours).
- Using total time when you meant moving time, which inflates average speed if there are stops.
Frequently asked questions
How are speed, distance and time related?
Speed = distance ÷ time, distance = speed × time, and time = distance ÷ speed. Enter any two to find the third.
How do I convert between km/h and m/s?
Divide km/h by 3.6 to get m/s, or multiply m/s by 3.6 to get km/h.
What units does it use?
Kilometres, hours and km/h — convert other units first.
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Cite this tool
Zerdly. (2026). Speed, Distance & Time Calculator. Retrieved from https://www.zerdly.com/tools/speed-distance-time-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.