Speed Distance Time Calculator
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A practical solver for the three fundamental motion variables. Choose which unknown to solve for - Time (from speed and distance), Distance (from speed and time), or Speed (from distance and time) - then enter the two known values in your preferred units. Speed units: km/h, mph, m/s, knots, min/km (running pace). Distance units: km, miles, meters, feet. Time units: seconds, minutes, hours. Results show the primary answer plus a speed-equivalents table converting your speed into all other units, and a summary box with all three values. Formatted time output uses hours/minutes/seconds notation. Ideal for travel planning, physics problems, running pace calculation, and geography. 100% browser-based.
How to Use
- 1Select what you want to solve for: Time, Distance, or Speed
- 2Enter the two known values and select their units
- 3Click 'Calculate' to see the unknown value plus a Speed Equivalents table
- 4For running pace, select 'min/km' in the speed unit dropdown
- 5Review the three-cell summary to verify all values are correct
Features
- Solve for any of the three: Speed, Distance, or Time
- Speed units: km/h, mph, m/s, knots, min/km (running pace)
- Distance units: km, miles, meters, feet
- Time units: seconds, minutes, hours
- Formatted time output: Xh Ym Zs notation
- Speed equivalents table: your speed in all 5 units simultaneously
- 100% browser-based - no data sent anywhere
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