The measuring wheel – also known as a surveyor's wheel, clickwheel, odometer, or trundle wheel – is a tool used to measure distances. Measuring wheels have a counting mechanism that counts the number of rotations and uses the circumference of the wheel to calculate the distance covered.
A measuring wheel, which is often used for measuring distances, is commonly referred to as a "surveyor's wheel," "rolling measure," "odometer wheel," or simply a "measuring wheel." These devices typically consist of a wheel with a calibrated circumference and a handle. As the wheel is rolled along a surface, it counts the number of revolutions or measures the distance traveled, providing an accurate measurement of distance, often in feet or meters, depending on the units of calibration. Surveyors, engineers, construction professionals, and others frequently use measuring wheels for various measurement and surveying tasks.