Golf handicap index calculator
Estimate your Handicap Index the way the World Handicap System does. Add the courses you played with their Course Rating and Slope Rating (they're on the scorecard, or ask the pro shop for the tees you played), then your rounds, oldest first. You need at least three 18-hole rounds, or the same number of holes in 9-hole rounds.
Your Handicap Index
Handicap Index
See your strokes on a course →
| Round | Course | Score | Differential |
|---|
Highlighted differentials are the ones that count toward your index.
How it works
Each round becomes a score differential: (113 ÷ Slope Rating) × (adjusted score − Course Rating − PCC). Your Handicap Index is the average of your lowest differentials from your 20 most recent rounds: the lowest 8 of 20, fewer when you have fewer rounds (the lowest 1 of 3, 2 of 6, 3 of 9 and so on), with a small reduction when you have 3, 4 or 6. The maximum is 54.0.
Adjusted score is your gross score with any hole capped at net double bogey (par + 2 + the strokes you get on that hole). PCC, the playing conditions calculation, is set by the handicap system each day when scores are unusually high or low, for instance in strong wind; leave it at 0 if you don't know it.
9-hole rounds are rated against half the 18-hole Course Rating, and paired in the order you played them to make one 18-hole differential; an odd one waits for its partner. The official system now combines a 9-hole round with the score expected from your existing index instead, and uses each nine's own rating, so results for 9-hole rounds can differ by a few tenths.
This is an estimate. Your official Handicap Index comes from your golf association, which also applies caps that limit how fast an index can rise and a reduction after an exceptional round, using your scoring history.