Calculate speed, distance, or time — enter any two values to find the third.
The Speed Distance Time Calculator solves for any one of the three variables when you know the other two. Enter speed and distance to find time; speed and time to find distance; or distance and time to find speed. Set the unknown variable to 0. Useful for travel planning, physics problems, fitness tracking, and everyday calculations.
1. Enter any two values: speed, distance, or time.
2. Leave the unknown value as 0 (zero).
3. The calculator solves for the missing value.
Speed in km/h, distance in km, time in hours.
Speed = Distance / Time
Distance = Speed x Time
Time = Distance / Speed
Set the value you want to find to 0. The calculator detects which is 0 and solves for it.
Example 1 — Find time: Speed = 60 km/h, Distance = 120 km, Time = 0
Time = 120 / 60 = 2 hours
Example 2 — Find distance: Speed = 80 km/h, Time = 1.5 hours, Distance = 0
Distance = 80 x 1.5 = 120 km
Example 3 — Find speed: Distance = 100 km, Time = 2 hours, Speed = 0
Speed = 100 / 2 = 50 km/h