Ever wondered how far you could go in a certain amount of time, or how long it would take to get somewhere if you knew how fast you were going? This cool recipe might help:

Distance = speed x time (noted as d = v x t for the science enthusiasts out there). Basically, you multiply your speed by the number you move to get the total distance.

Here’s the catch: Everything must be in the same unit! So, if your speed is in miles per hour (mph) but you’re measuring the distance in kilometers, you’ll need to convert one of them. Otherwise your answer could be in some weird unit that doesn’t really make sense.

The key is to match the ratio of speed to time so that you get a common distance such as miles and kilometers. Our awesome distance calculator (see above!) can sometimes even give you the route in units for your convenience.