MOI Adjustment

The whole club MOI of the assembled club could be adjusted in several ways. It could be done by increasing (or decreasing) of:

  • the weight of the club head
  • the total length of the club

Usually the weight of the club head is increased by applying a lead tape on the head back or around the hosel or by adding lead or tungsten weight in the tip of the shaft. Reducing is not so easy and it could be done by drilling the head (usually back of the head) or by drilling the bottom of the hosel bore.

The calculator below computes the adjusted MOI after applying weight and length corrections. The picture at the bottom of the page shows how to measure the distance from CG to the butt.



  • The result of the calculation based on correct measurements is the good approximation, but it is still an approximation. Use it at your own risk.


Center of gravity of the golf club


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back to: Moment of Inertia

update: November 2017