# 5 Lug Bolt Circle Calculator

 Enter the measured diameter of the stud: Measure the distance between the two outer edges of the adjacent studs. Enter the measured distance: Your 5 Lug Bolt Circle is:

## Instructions

1. Use a set of calipers that measure to the nearest .001". Please follow directions on using your calipers.
2. Measure the diameter of the stud, making sure the calipers measure the outer edge (major diameter) of the threads, and not the inner diameter of the threads. Enter this in the first box.
3. Measure the distance between two adjacent studs. Make sure you measure from the outside of each stud, again using the outer diameter of the threads. Enter this reading into the second box.
4. Hit the "Calculate" button!

The calculator works, as long as accurate measurements have been entered. If you do not feel comfortable making measurements, please find someone that can.
If you want to measure from centerline to centerline, enter 0 for the stud diameter.
If you want to measure the inside distance between the two adjacent studs, enter a negative number for stud diameter.
If you want to measure the bolt circle for your rims, the same instructions apply, just measure to the edge of the lugnut hole.

Happy measuring!
Andris Skulte

## Alternate Method

1. Measure from the center of a stud to the center of the opposite stud.
2. Enter into form below, and press calculate.
3. This should match (or be very close) to the number in the first method).

 Enter the distance from the center of a stud to the center of the opposite stud: Your 5 Lug Bolt Circle is:
Actual Bolt Circle vs Measured Distance Center to Center of Opposite Stud
3.937" (100mm) vs 3.744"
4" (101.6mm) vs 3.804"
4.25" (108mm) vs 4.042"
4.409" (112mm) vs 4.193"
4.5" (114.3mm) vs 4.280"
4.528" (115mm) vs 4.306"
4.724" (120mm) vs 4.493"
4.75" (120.6mm) vs 4.518"
5" (127mm) vs 4.755"
5.118" (130mm) vs 4.868"
5.5" (139.7mm) vs 5.231"