Speed, Distance, Time Calculator
Calculate one value when you know the other two.
Enter any two values to calculate the third.
About this Tool
The Speed, Distance, Time Calculator is a fundamental tool based on the formula Speed = Distance / Time. It allows you to solve for any one of these three variables, as long as you know the other two. It's widely used in physics, travel planning, and athletics.
Common Use Cases
Travel Planning
Estimate your travel time for a road trip based on your average speed and the distance to your destination.
Running and Cycling
Calculate your average speed on a run or bike ride, or determine how long it will take you to cover a certain distance at your target pace.
Physics Problems
Solve for speed, distance, or time in introductory physics homework and experiments.
Pro Tips
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Keep Units Consistent
Make sure your units match. If your distance is in kilometers and your time is in hours, your speed will be in kilometers per hour (km/h).
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Average Speed
In most real-world scenarios, you are calculating 'average speed,' as your instantaneous speed will vary.
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Converting Units
Remember common conversions: 1 mile is approximately 1.609 kilometers. 1 hour is 60 minutes.