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Distance Calculator

Formula: Distance = Speed × Time

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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.

Distance examples

Each distance is speed times time, shown to two decimal places in kilometres.

SpeedTimeDistanceWhat it marks
60 km/h2 hours120.00 kmTwo hours
80 km/h1.5 hours120.00 km90 minutes
50 km/h0.5 hours25.00 km30 minutes
100 km/h0.75 hours75.00 km45 minutes
40 km/h2.5 hours100.00 kmTwo and a half hours
45 km/h1.25 hours56.25 km75 minutes
90 km/h0.25 hours22.50 km15 minutes
120 km/h0.1 hours12.00 km6 minutes

How to read the result

  • Multiply the two inputs

    40 km/h for 2.5 hours is 100.00 km.

  • Hours, not minutes

    45 minutes is 0.75 hours. 100 km/h for 0.75 hours is 75.00 km.

  • Two decimal places

    45 km/h for 1.25 hours is printed as 56.25 km.

  • One steady speed

    The result holds while that speed lasts. It is not a route on a map.

Frequently asked questions

  • How is distance calculated?

    Distance = speed × time. Speed is in kilometres per hour and time is in hours, so the result is in kilometres, shown to two decimal places. 60 km/h for 2 hours is 120.00 km.

  • How do I enter minutes?

    The time field is hours, so convert minutes by dividing by 60. 30 minutes is 0.5 hours, and 50 km/h for 0.5 hours is 25.00 km. 15 minutes is 0.25 hours, and 90 km/h for 0.25 hours is 22.50 km.

  • What is 80 km/h for 1.5 hours?

    80 × 1.5 = 120. One and a half hours is 90 minutes. The page shows 120.00 km.

  • What if speed or time is zero?

    Zero is allowed. 0 km/h for 5 hours is 0.00 km, and 60 km/h for 0 hours is 0.00 km. A negative speed or a negative time leaves the result as --.

  • Does this assume a steady speed?

    Yes. The formula multiplies one speed by one time. If the speed changes, use the average speed for the whole trip. 40 km/h for 2.5 hours is 100.00 km only while that speed holds.

  • Is this the driving distance between two cities?

    No. It does not use a map. It is how far you travel at a constant speed for the hours you enter. A 100 km/h drive for 0.75 hours covers 75.00 km.

  • Why are there always two decimal places?

    The kilometre figure is fixed at two digits after the decimal. 45 km/h for 1.25 hours is 56.25 km. 120 km/h for 0.1 hours, which is 6 minutes, is 12.00 km.

  • Can I enter speed in metres per second?

    The label is km/h. A value in m/s, mph, or minutes will not match the kilometre result. Convert to km/h and hours first. 36 km/h is 10 m/s, and 36 km/h for 1 hour is 36.00 km.

  • How do I find the time if I already know the distance?

    Time in hours = distance ÷ speed. To cover 120 km at 60 km/h takes 120 ÷ 60 = 2 hours. Entering 60 and 2 returns 120.00 km.

  • What does an empty field show?

    Both speed and time must be filled with a number that is 0 or greater. Until then the result is --.