The Trundle wheel is a measuring device used to find the distance from one location to another.

The trundle wheel is made up of a wheel (usually with the circumference of one metre), a handle which is attached to the axle of the wheel, and a device which "clicks" every time the wheel makes one complete turn. As the wheel moves along the ground (or other surface), the user counts the number of "clicks". Since the circumference of the wheel is one metre, every time the trundle wheel "clicks", one metre of distance has been traveled.

Trundle wheels are not as accurate as other devices used to measure a distance but provide an easy way to get an estimate of a distance that may be too long to measure using typically available measuring tools.