Handicap calculator
Enter the score, course rating, and slope for your recent rounds. The calculator returns each round's handicap differential and an estimated Handicap Index. No account, no data stored.
Estimated Handicap Index
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Based on 0 valid rounds. USGA uses your best 8 of the last 20 — fill more rounds for a closer estimate.
Your rounds
How the calculation works
For each round you enter, the handicap differential is:
differential = (score − course rating) × 113 ÷ slope
Your Handicap Index uses your best differentials from the last 20 rounds: 8 if you have 20 rounds, fewer when you have less data. The sum is averaged and multiplied by 0.96 to get the Index.
The course rating is the expected score for a scratch golfer on those tees. The slope rating measures how much harder the course plays for a bogey golfer relative to a scratch golfer — 113 is the average.
This calculator is for estimation only. Official USGA Handicap Indexes are issued by your authorised club or association after posting verified scores.