Measure the distance shown by the blue dashed line in the diagram, enter it below, and we'll calculate the Pitch Circle Diameter and find the closest standard PCD.
Measure centre-to-centre between two neighbouring bolt holes, as shown by the blue line in the diagram
calculated PCD
best match
PCD (Pitch Circle Diameter) is the diameter of an imaginary circle drawn through the centre of all the bolt holes on a wheel. It is expressed as two numbers: the number of studs and the diameter in millimetres, for example 5x114.3.
Getting the PCD right is essential when buying alloy wheels — a wheel with the wrong PCD simply will not bolt onto your car. If you don't have a PCD gauge, measuring the distance between two adjacent bolt holes and using this calculator is the next best thing.
Turn the wheel over so you can see the back face. The measurement method depends on your stud count:
4 and 6 stud wheels: Measure from the centre of one bolt hole straight across to the centre of the opposite bolt hole. This measurement is your PCD directly.
3 and 5 stud wheels: Because there is no bolt hole directly opposite, measure from the centre of one bolt hole to the centre of the bolt hole next to it. The calculator converts this adjacent measurement into the PCD.
For the most accurate result, use digital callipers and take multiple measurements, then use the average.
