Find speed, distance or elapsed travel time from two known values, with clear unit conversions and formulas in your browser.
01 / CHOOSE A RESULT
02 / TRAVEL DETAILS
Enter positive distance and speed; time must be greater than zero when used. The unknown value is calculated in the selected units.
03 / YOUR RESULT
04 / FORMULA
Units are converted to meters and seconds first. 1 mile = 1,609.344 meters; 1 hour = 3,600 seconds. Display values are rounded, but the calculation uses unrounded values.
All travel calculations stay in your browser.
Enter the values you want to compare; processing happens in your browser.
Adjust optional settings and review validation feedback before relying on the estimate.
Review the formulas and equivalent values, then copy the result you need.
Select the quantity to find, enter two positive known values and choose distance and speed units. Time is entered as hours, minutes and seconds.
Solve three travel equations, switch km, miles or meters and km/h, mph or m/s, and view hours, minutes and seconds without uploads.
Travel measurements are calculated in browser memory. No input is uploaded or stored.
Speed equals distance divided by elapsed time; distance equals speed times time; time equals distance divided by speed. Units are converted to meters and seconds before calculation.
Yes. Select Find time, enter miles and mph and choose their units. The result is displayed in hours, minutes and seconds.
Yes. Each result shows kilometers and miles as well as the chosen distance unit. One mile is exactly 1,609.344 meters.
Yes. Set hours to zero, then enter a positive number of minutes or seconds. Minutes must be 0–59 and seconds 0–59.999.
No. A positive speed or elapsed time is needed for division; the calculator flags zero or indeterminate inputs.
No. The calculation and unit conversions run in your browser; the entered values are not uploaded or saved.