Calculators
Speed Distance Time Calculator
Solve for speed, distance, or time from the other two values with consistent units locally in your browser.
Choose what to solve for, then enter the other two values using consistent units (for example, kilometres with hours, or miles with hours). Calculations run locally in your browser; your values are not uploaded or stored.
Solve the speed, distance, and time triangle without uploading anything.
Choose whether to solve for speed, distance, or time, then enter the other two values with consistent units. The calculator applies speed = distance ÷ time, distance = speed × time, or time = distance ÷ speed and shows the worked formula. Everything runs locally in your browser, so your values are not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
Which formulas does the speed distance time calculator use?
It uses speed = distance ÷ time, distance = speed × time, and time = distance ÷ speed. For example, 100 distance units in 2 time units gives a speed of 50 distance units per time unit.
Which units should I use?
Use the same distance and time units on both inputs, such as kilometres with hours or miles with hours. The answer is reported in the matching combined unit, for example kilometres per hour.
Which inputs are accepted?
Enter values of zero or greater up to 1,000,000,000,000. Time must be greater than zero when solving for speed, and speed must be greater than zero when solving for time. Missing or non-numeric entries show a clear error instead of a result.
Do my values stay private?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the values you enter.