Everyday · travel
Speed, Distance & Time Calculator
By the Dailycaltor team · formula-verified · last updated July 2026
Know two, find the third.
Speed
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Details
In miles—
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Formula
Speed = distance ÷ time. Time = distance ÷ speed. Distance = speed × time. Keep units consistent — km with km/h, or miles with mph (1 mile = 1.609 km).
Worked examples
- 120 km in 1h 30m → 80 km/h (≈50 mph).
- 300 km at 100 km/h → 3 hours.
- 2 hours at 65 mph → 130 miles (≈209 km).
Common mistakes
- Entering 1.5 hours as 1h 50m — decimals and minutes differ.
- Mixing miles with km/h.
- Ignoring stops: average trip speed includes breaks.
Last updated: July 2026. Educational estimates only.
Questions
How do I calculate travel time?
Divide distance by speed: 240 km at 80 km/h is 3 hours. Choose “Time” above.
How do I convert km/h to mph?
Divide by 1.609: 100 km/h ≈ 62 mph.
Why is my trip slower than this?
Real trips include traffic and stops; average speed is below cruising speed.
Does this work for running or cycling?
Yes — same physics; pair it with the pace calculator for per-km splits.
Can it solve any of the three?
Yes — pick which to find and enter the other two.