If you mean how much change in point of impact per movement of the rear sight, there's a formula.  Very precisely measure the distance between the front and rear sights (sight radius).   The movement of point of impact on the target is proportional to change in rear sight height , sight radius, and the distance to the target.

All measurements are in inches, (including range to the target.)

Formula:
Impact change at target /[(range to target) X (sight radius)]=change in sight height

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