Free online speed calculator: calculate speed, distance, or time. Enter any two values to find the third. Perfect for travel, physics, and everyday calculations. Mac OS 9 retro style.
Select whether you want to calculate Speed, Distance, or Time. The calculator will show the appropriate input fields based on your selection.
Enter the two known values into the input fields. For example, to calculate speed, enter distance and time. Select the appropriate units for each value.
Choose units from the dropdown menus. Distance supports km, miles, and meters. Time supports hours, minutes, and seconds. Speed supports km/h, mph, and m/s.
Click Calculate to see the result. The answer is displayed with the appropriate unit. Use the Clear button to reset all fields and start a new calculation.
Q: What is the formula for speed?
A: Speed = Distance ÷ Time. If you know any two variables, you can calculate the third. The calculator handles all three scenarios.
Q: Can I convert between km/h and mph?
A: Yes. The calculator automatically converts between units. 1 mile = 1.60934 km, so to convert mph to km/h, multiply by 1.60934.
Q: How precise are the results?
A: Results are displayed with up to 4 decimal places for small values and rounded to integers for large values. This provides a good balance of accuracy and readability.