Speed / Distance / Time
About Speed / Distance / Time
Solve any speed, distance, or time problem by entering the two values you know. The calculator works out the third using the classic formula distance = speed × time, and handles unit conversions between km/h, mph, and m/s for speed and miles and kilometers for distance. Useful for planning drives and runs, estimating travel times, checking pacing for workouts, and solving physics and homework problems. Everything runs in your browser with no signup.
How To Use
- Enter the two values you know — any two of speed, distance, and time.
- Choose the units for each value (km/h, mph, m/s, miles, or kilometers).
- Read the computed third value, with the units converted for you.
Example
Input: A 240 km drive at an average speed of 80 km/h.
Output: A travel time of 3 hours to cover the 240 km distance.
Who Uses Speed / Distance / Time
- Drivers, runners, and planners calculating travel time, speed, or distance with unit conversions.
- Students and hobbyists solving physics or pacing problems privately in the browser.
- Anyone needing a quick, no-upload calculator for speed-distance-time math.
Frequently Asked Questions
What is the formula for speed, distance, and time?
Distance = speed × time, speed = distance ÷ time, and time = distance ÷ speed. This calculator applies the right one automatically based on which two values you enter.
Which units are supported?
Speed can be entered in km/h, mph, or m/s, and distance in miles or kilometers. The calculator converts between them so you can mix and match.
Can I use this for running or cycling pace?
Yes. Enter your distance and the time you expect to take, and the calculator returns your average speed — handy for planning race pacing or commute times.
Does it work for physics homework?
Yes. The same formula covers basic kinematics problems, so you can use it to check your working for any constant-speed question.