Golf handicap differential calculator
A handicap differential normalises a score for how hard the course played that day, using its rating and slope.
Score differential
18.19
- Course handicap
- 15.5
- Playing handicap at 95% allowance
- 14.7
- Net score
- 76.5
- Net score against par
- 4.5
- Strokes per hole
- 0.860
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- Adjusted gross score = 92
- Course rating = 71.4
- Slope rating = 128
- Par = 72
- Your handicap index = 14.2
- Score differential = (92 - 71.4) * 113 / 128 = 18.1859
- Course handicap = 14.2 * 128 / 113 + (71.4 - 72) = 15.485
- Net score = 92 - 15.485 = 76.515
- Net score against par = 76.515 - 72 = 4.515 04
- Strokes per hole = 15.485 / 18 = 0.860 275
- Playing handicap at 95% allowance = 15.485 * 0.95 = 14.7107
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- differential = (adjusted gross score - course rating) x 113 / slope rating
- course handicap = handicap index x slope / 113 + (course rating - par)
113 is the slope rating of a course of average difficulty, which is what the scale is anchored to.