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Golf Handicap Calculator

Handicap index from your scores under the World Handicap System.

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Your rounds

Adjusted gross score, course rating and slope rating for each.

Score differentials

RoundScoreRating / slopeDifferentialCounts?

Course handicap

How the World Handicap System works

Each round produces a score differential: (adjusted gross score − course rating) × 113 ÷ slope rating. The 113 is the slope rating of a course of average difficulty. Your index is the average of the best eight differentials from your last twenty rounds — which is why a handicap describes your potential rather than your average, and why most golfers play to it only about a fifth of the time.

Handicap index

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Details

Rounds counted—
Best differential—
Average differential—
Adjustment applied—

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Course handicap for the slope you entered

An unofficial calculator that implements the published World Handicap System method. An official index comes from your national association or club, which applies soft and hard caps and exceptional score reductions that a simple calculator cannot reproduce.

Quick Tool Overview

The Golf Handicap Calculator produces a handicap index from your recent rounds using the World Handicap System method, showing each score differential, and converts the index into a course handicap for any slope rating.

What it does
Calculates a WHS handicap index and course handicap
You give it
Scores with course rating and slope for each round
You get back
Score differentials, an index and a course handicap
Best for
Tracking your handicap between official updates
Calculators Free, unlimited use No sign-up Runs in your browser

About the Golf Handicap Calculator

Work out a handicap index from your recent rounds using the World Handicap System method, then convert it into a course handicap for whichever course you are playing. Score differentials are calculated for every round you enter.

The system takes the best eight differentials from your most recent twenty rounds and averages them, which is why a handicap represents your potential rather than your average — a good golfer plays to their handicap only about a quarter of the time. Each differential adjusts your score for the difficulty of the course through its course rating and slope rating, so rounds played on very different courses become directly comparable.

Key features of the Golf Handicap Calculator

The real WHS method

Best eight differentials from the last twenty, using the official sliding table for fewer rounds.

Every differential shown

So you can see which rounds are counting and which are being discarded.

Course handicap conversion

Index × slope ÷ 113 plus the rating adjustment, for whichever tees you play.

Handles partial records

Works from as few as three rounds, applying the correct adjustment for the count.

Explains potential versus average

A handicap measures your best rounds, which is why you rarely play to it.

How to use the Golf Handicap Calculator

  1. 1

    Enter your rounds

    Adjusted gross score, course rating and slope rating for each.

  2. 2

    Read the differentials

    Each round is converted into a score differential and shown.

  3. 3

    See your index

    The average of your best differentials, following the WHS table.

  4. 4

    Convert for a course

    Enter a slope rating to get the course handicap you would play off.

Frequently asked questions

Each round gives a score differential: (adjusted gross score − course rating) × 113 ÷ slope rating. The handicap index is the average of the best eight of your last twenty.

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