Distance Calculator

Enter a speed and pick its unit, then type how long you travel in hours, minutes, and seconds. The distance appears right away, shown in kilometers, miles, and meters, so you can read whichever unit suits the trip.

The figure assumes a steady speed for the whole time. To go the other way and find your average speed from a distance you already covered, use the speed calculator.

Distance is speed times time. The tool converts your speed to meters per second and your time to seconds, multiplies them, then shows the result in three units. So 100 km/h for 1 hour 30 minutes is 150 kilometers, which is about 93 miles.

Because it uses one steady speed, the result is an estimate for real trips with stops and changes of pace. For a trip you have already made, where you know the distance and the time, the speed calculator gives the true average.

You can enter speed in km/h, mph, m/s, ft/s, or knots. Knots are common in boating and aviation, where one knot is one nautical mile per hour. The tool handles the conversion, so you can mix a speed in knots with a plain answer in kilometers.

The result always lists kilometers, miles, and meters together, which saves a second step. To convert a length on its own, without a speed and a time, the unit converter handles length directly.

Drivers estimate how far they will get in a few hours on the motorway. Cyclists plan a route by time rather than a map. Sailors and pilots work out a leg from a heading speed and a planned duration.

It is also useful for quick physics problems, where speed and time are known and distance is the unknown. To add up the travel time itself across stages, the time calculator adds and subtracts durations.