You probably didn’t appreciate the practical application for learning all those distance- and-speed problems in your math and physics classes—at least not until you had to calculate the travel time to your next business meeting in a distant city.

Enter the Digital Map Distance Finder. This handy gadget can quickly calculate the number of miles and travel time to your next destination, using a traditional paper map as a guide. Using the Map Distance Finder is easy, too. First, enter your map’s scale and your travel speed into the Map Distance Finder and then roll the built-in tracker wheel over the route on your map. The device uses this information to instantly calculate the number of miles and travel time to your destination.

The Map Distance Finder is compact easily fits into your glove compartment. It also includes a magnifying lens to help you read the fine print on small-scale maps.