Tripmeter

A tripmeter is a measuring instrument used in motor vehicles to record the distance traveled during a specific trip. It operates independently from the vehicle's odometer and is used for trip planning, fuel economy calculations, and maintenance scheduling. Tripmeters can be mechanical or electronic and are commonly integrated into the instrument cluster or available as standalone devices.

Mechanical tripmeters are driven by the odometer cable linked to the transmission. As the vehicle moves, gears advance the trip counter, which is typically a set of drums or digits. A reset knob allows the user to zero the counter at the start of a trip.

Electronic tripmeters and trip computers derive distance data from wheel speed sensors, the ECU, or GPS. They may provide multiple trip memories (Trip A, Trip B), along with auxiliary data such as average speed, elapsed time, and estimated fuel consumption. In some vehicles, the trip computer integrates with navigation systems to offer route and efficiency information.

GPS-based trip meters rely on satellite positioning data and are common in modern cars, motorcycles, and aftermarket devices. They offer performance in cases where mechanical linkages are impractical or damaged, but can be affected by signal loss in tunnels or urban canyons.

Usage considerations include ensuring tire size remains consistent, as changes can affect distance measurements; regular resets; and awareness that calibration discrepancies can occur between different devices. Tripmeters are widely used by drivers to monitor fuel economy, plan trips, and schedule maintenance.