Golf Handicap Calculator

USGA-style Handicap Index from recent score differentials (best 8 of last 20 rounds).

Calculator Numbers & Math Updated Apr 20, 2026
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How to Use
  1. Enter recent adjusted gross scores (5+ rounds).
  2. Provide course rating and slope — differentials are auto-computed.
Input
Handicap Index

Formula

Differential
(score − rating) × 113 / slope
Index
average of best differentials — 5 rounds uses lowest 1, 20 uses best 8

Last updated: