Speed, distance, and time formulas
The base relationship is d = v × t. Solve for speed with v = d/t, or solve for time with t = d/v. Marking one field with ? tells the calculator which form to use.
Calculators / Quick tool
Speed, Distance & Time Calculator
Solve one missing value in distance (km) = speed (km/h) × time (h).
● Processed locally in your browser
How to useHow to use Speed, Distance & Time Calculator ⌄
Solve one missing value in distance (km) = speed (km/h) × time (h).
- 1
Paste content, enter parameters or choose the files you need in “Distance km, speed km/h and time h; one ?”.
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Choose “Solve measurement” for the job. Processing runs in this browser.
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Review the result under “Solved travel measurement”, then copy or download it after checking the output.
Result guide
What Speed, Distance & Time Calculator calculates
Enter two known values and use ? for the missing one. The result shows distance = speed × time or the matching rearrangement, substitutes your inputs, and returns kilometres, kilometres per hour, or hours.
Worked travel example
A 150 km trip completed in 2.5 hours has an average speed of 150 ÷ 2.5 = 60 km/h. The result is an average over the whole duration, not the vehicle’s instantaneous speed.
Assumptions and units
This version expects kilometres, kilometres per hour, and decimal hours. Convert 30 minutes to 0.5 hours before entry. Stops, acceleration, route changes, and traffic are included only if they are already reflected in the total time.
Frequently asked questions
How do I calculate travel time?
Use t = d/v. Mark time with ?, then enter distance in kilometres and average speed in kilometres per hour. The result is returned in decimal hours.
Does the calculator support minutes?
The calculation input uses decimal hours. Convert minutes by dividing by 60; for example, 45 minutes is 0.75 hours. The related decimal-hours converter can do that step.
Is speed the same as velocity?
Not exactly. This calculator uses scalar speed and total distance. Velocity also includes direction and is normally based on displacement rather than path length.
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