Free Speed Distance Time Calculator Online
Calculate speed, distance, or time from any two known values
Versatile Motion Calculator
Solve for any variable in the speed-distance-time equation
Calculate speed from distance and time, distance from speed and time, or time from speed and distance.
See results in multiple units including km/h, mph, m/s, and knots for instant cross-reference.
Enter time in hours, minutes, and seconds separately for maximum convenience and precision.
About This Tool
A speed calculator solves the relationship between distance, time, and speed: any one of the three can be found from the other two. Speed is distance divided by time, distance is speed multiplied by time, and time is distance divided by speed.
The practical difficulty is usually units. Mixing kilometres with minutes, or miles with seconds, produces answers that are off by a factor you might not notice. The tool lets you choose the units for each field and converts consistently, so a pace in minutes per kilometre and a speed in kilometres per hour describe the same motion correctly.
Average speed and instantaneous speed are not the same: a journey with stops and varying pace has an average that hides the peaks and pauses along the way. This calculator gives the average over whatever distance and time you enter, which is the figure most useful for planning arrivals and comparing routes.
How to Use It
- Enter any two of distance, time, and speed.
- Choose the units for each value.
- Read the third quantity, calculated from the two you supplied.
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