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Golf Handicap Calculator

Score differential and handicap index from your rounds.

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Rex says

Everyday utility math — the kind you'd otherwise pull up four browser tabs for. I keep it to one clean answer.

Try a scenario

Click to load — tweak from there.

Inputs

Result

Score differential

18.2

Handicap index (this round)

17.5

Course handicap

20

Net score

71.6

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How to use this

  1. 1Enter adjusted gross score.
  2. 2Enter course rating.
  3. 3Enter slope rating.
  4. 4Enter slope of course you're playing.
  5. 5Read your score differential on the right — it updates as you type.
  6. 6Hit Share to keep the scenario or send it to someone.

About this calculator

Compute a score differential from an adjusted gross score, course rating, and slope, then see the resulting handicap index and your course handicap at any slope.

FormulaDifferential = (113 ÷ slope) × (adjusted score − course rating). Index = average of best differentials × 0.96.

Worked example

Using the values the calculator loads with:

Inputs

  • Adjusted gross score: 92
  • Course rating: 71.4
  • Slope rating: 128
  • Slope of course you're playing: 132

Results

  • Score differential: 18.2
  • Handicap index (this round): 17.5
  • Course handicap: 20
  • Net score: 71.6

What each field means

Inputs

Adjusted gross score
The adjusted gross score used in the calculation. Starts at 92 so you have a working example on load.
Course rating
The course rating used in the calculation. Starts at 71.4 so you have a working example on load.
Slope rating
The slope rating used in the calculation. Starts at 128 so you have a working example on load. Accepted range: 55–155.
Slope of course you're playing
The slope of course you're playing used in the calculation. Starts at 132 so you have a working example on load. Accepted range: 55–155.

Results

Score differential
Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Handicap index (this round)
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Course handicap
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
Net score
Returned as a decimal number. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.

FAQ

Is one round enough?

No. An official index averages the best 8 of your last 20 differentials. A single round gives you the differential to feed that average.

What is slope 113?

It's the standard baseline for a course of average difficulty, which is why it appears in the formula.

Accuracy and limitations

  • Estimates assume standard, average conditions — local rules, pricing, and materials vary.
  • Results are rounded for readability; add a buffer before ordering, booking, or committing.
  • Double-check anything with a real cost attached against a local quote.

Cite this calculator

Writing about this topic? Grab a citation — every link helps keep these tools free.

APA
RevenueLab. (2026). Golf Handicap Index Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/golf-handicap
HTML
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/golf-handicap" target="_blank" rel="noopener">Golf Handicap Index Calculator — RevenueLab</a> (2026).</p>
Markdown
Source: [Golf Handicap Index Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/golf-handicap) (2026).
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