How this distance calculator works
Enter a speed in kilometres per hour and a time in hours. The calculator multiplies them. Distance = speed × time, and the result is shown in kilometres to two decimal places.
The units have to match. Kilometres per hour times hours cancels the hours and leaves kilometres. 60 km/h for 2 hours is 60 × 2 = 120.00 km. The same 120.00 km comes from 80 km/h for 1.5 hours, because 80 × 1.5 = 120.
The time box is hours, not minutes. Divide minutes by 60 before you type them. 30 minutes is 0.5, so 50 km/h for half an hour is 25.00 km. 15 minutes is 0.25, so 90 km/h for a quarter of an hour is 22.50 km. 6 minutes is 0.1 hours, and 120 km/h for 0.1 hours is 12.00 km.
Both fields must be filled, and each value must be 0 or greater. Zero speed or zero time returns 0.00 km. A negative value leaves the result as --. The formula uses one speed for the whole time, so a trip with several speeds needs the average speed for those hours. This is not a map distance between two places.