Golf Handicap Calculator

WHS 2024 · transparent inputs

Course handicap and initial index, in one workspace

Match the job to the right rule: convert an existing Handicap Index for one U.S. 18-hole course, or estimate an initial index from 3–20 complete 18-hole scoring-record entries.

USGA Course Handicap3–20 recordsPCC −1 to +3

USGA Rule 6.1a · 18 holes

Handicap for the exact tees you will play

Use the Handicap Index from the player's record and the Course Rating, Slope Rating, and par printed for the same tees and rating category.

HI × Slope ÷ 113 + (CR − par)

Rule reference

What the calculation includes—and refuses to guess

The initial-index path uses the current Rule 5.2a count table. It does not turn a 9-hole raw score into a made-up 18-hole equivalent.

Show the 3–20 record selection table

Records	Used	Initial adjustment
3	Lowest 1	−2.0
4	Lowest 1	−1.0
5	Lowest 1	None
6	Lowest 2 average	−1.0
7–8	Lowest 2 average	None
9–11	Lowest 3 average	None
12–14	Lowest 4 average	None
15–16	Lowest 5 average	None
17–18	Lowest 6 average	None
19	Lowest 7 average	None
20	Lowest 8 average	None

Why there is no 9-hole score box

Since 2024, U.S. 9-hole processing adds an Expected Score Differential generated from the player's Handicap Index on the day played. The full statistical mapping is not reproduced from the visible score alone.

Handicap Index ≠ Course Handicap

The index describes demonstrated ability in the official record. Course Handicap adapts that existing index to one set of tees. Playing Handicap may then apply a competition allowance.

WHS initial-index audit

A Golf Handicap Worksheet Must Preserve the Scoring Record Rules

This independent calculator reproduces a bounded U.S. World Handicap System subset for three through twenty acceptable, complete 18-hole scores. It calculates and ranks Score Differentials, applies Rule 5.2a, and caps an initial value at 54.0; it does not issue an official Handicap Index or replace an Authorized Association's record.

Step-by-step guide · WHS initial-index audit

Build One Score Differential for Every Round

Current rule basis: WHS Rules effective January 2024
Accepted worksheet: 3–20 complete 18-hole rounds
Official status: Estimate only; association record controls

Start with adjusted gross score
Use an acceptable score already adjusted under the Rules of Handicapping. A raw card that still needs maximum-hole-score or unplayed-hole treatment is not ready for this worksheet.
Match the exact course data
Pair each score with the Course Rating and Slope Rating for the tees and rating category played. Slope must be the published value, not a difficulty guess.
Enter the issued PCC
Use the daily Playing Conditions Calculation shown in the official scoring record. PCC is an automated statistical adjustment from -1 through +3, not a number chosen from personal weather impressions.
Apply the Rule 5.1a expression
Multiply 113 divided by Slope Rating by adjusted gross score minus Course Rating minus PCC, then round that round's differential to the nearest tenth as the rule requires.

A Golf Handicap Worksheet Must Preserve the Scoring Record Rules: This independent calculator reproduces a bounded U.S. World Handicap System subset for three through twenty acceptable, complete 18-hole scores. It calculates and ranks Score Differentials, applies Rule 5.2a, and caps an initial value at 54.0; it does not issue an official Handicap Index or replace an Authorized Association's record.

Build One Score Differential for Every Round

Start with adjusted gross score
Use an acceptable score already adjusted under the Rules of Handicapping. A raw card that still needs maximum-hole-score or unplayed-hole treatment is not ready for this worksheet.
Match the exact course data
Pair each score with the Course Rating and Slope Rating for the tees and rating category played. Slope must be the published value, not a difficulty guess.
Enter the issued PCC
Use the daily Playing Conditions Calculation shown in the official scoring record. PCC is an automated statistical adjustment from -1 through +3, not a number chosen from personal weather impressions.
Apply the Rule 5.1a expression
Multiply 113 divided by Slope Rating by adjusted gross score minus Course Rating minus PCC, then round that round's differential to the nearest tenth as the rule requires.

Selection Changes as the Record Grows

Three to five scores

Use the lowest single differential, with a -2.0 adjustment for three scores, -1.0 for four, and no table adjustment for five.

Six to nineteen scores

Rule 5.2a increases the number of lowest differentials used in stages. The worksheet follows the official table rather than taking a fixed percentage of every short record.

Twenty scores

Average the lowest eight of the most recent twenty under the basic calculation, while remembering that caps, exceptional-score reductions, and committee actions require scoring-record history beyond this form.

Rounding Is Part of the Rule, Not Display Decoration

Each complete-round Score Differential is rounded to one decimal before the lowest values are selected. The selected differentials are then averaged, the applicable initial adjustment is applied, and the final initial index is rounded to one decimal. Using full raw differentials in the selection or rounding every subtraction early can change which rounds count.

Use the rounding calculator to inspect a disputed decimal operation, and the statistics calculator to audit the selected set. Those general tools do not know WHS selection or adjustment rules, so their arithmetic is supporting evidence rather than an alternative handicap method.

Keep Index, Course Handicap, and Playing Handicap Separate

A Handicap Index is a portable measure derived from the scoring record. A Course Handicap converts it for a particular course, tees, Course Rating, Slope Rating, and par. A Playing Handicap can then apply a competition allowance. This page's primary branch estimates the index; it does not silently turn that number into strokes for a match.

The 113-over-slope term is a ratio, but a generic fraction calculator cannot decide whether the course inputs or score are acceptable. Nine-hole scores and rounds of ten through seventeen holes can involve expected-score procedures introduced in the current system; do not pad them into complete 18-hole entries.

Know What the Authorized Record Adds

Official systems determine score acceptability, PCC provenance, expected-score treatment, the Low Handicap Index, soft and hard caps, exceptional-score reductions, and committee adjustments.
A Handicap Committee may modify an initial value using evidence of demonstrated ability that is not available to the calculator.
Check the current jurisdictional rules and official scoring record before a competition; this independent site is not affiliated with USGA, The R&A, GHIN, a club, or an association.
Use the estimate to audit entered values and rule-table steps, never to post a score, establish eligibility, allocate official strokes, or predict the next round.

Important limitations

This page cannot issue or maintain an official Handicap Index. The initial-index path covers complete 18-hole entries only and excludes Expected Score completion for 9-hole or 10–17-hole rounds, ESR, Low Handicap Index, soft and hard caps, Committee adjustments, score aging, and jurisdiction-specific procedures. The Course Handicap tab uses the U.S. 18-hole CR-minus-par method and does not calculate Playing Handicap or competition allowances.

This formula passed its registered engineering tests and is published under an explicit site-owner policy authorization. No independent expert, QA, editorial, legal, or third-party review is claimed. Verify consequential results with a qualified professional.

WHS initial-index audit

A Golf Handicap Worksheet Must Preserve the Scoring Record Rules

Step-by-step guide · WHS initial-index audit

Build One Score Differential for Every Round

Current rule basis: WHS Rules effective January 2024
Accepted worksheet: 3–20 complete 18-hole rounds
Official status: Estimate only; association record controls

Start with adjusted gross score
Use an acceptable score already adjusted under the Rules of Handicapping. A raw card that still needs maximum-hole-score or unplayed-hole treatment is not ready for this worksheet.
Match the exact course data
Pair each score with the Course Rating and Slope Rating for the tees and rating category played. Slope must be the published value, not a difficulty guess.
Enter the issued PCC
Use the daily Playing Conditions Calculation shown in the official scoring record. PCC is an automated statistical adjustment from -1 through +3, not a number chosen from personal weather impressions.
Apply the Rule 5.1a expression
Multiply 113 divided by Slope Rating by adjusted gross score minus Course Rating minus PCC, then round that round's differential to the nearest tenth as the rule requires.

Build One Score Differential for Every Round

Start with adjusted gross score
Use an acceptable score already adjusted under the Rules of Handicapping. A raw card that still needs maximum-hole-score or unplayed-hole treatment is not ready for this worksheet.
Match the exact course data
Pair each score with the Course Rating and Slope Rating for the tees and rating category played. Slope must be the published value, not a difficulty guess.
Enter the issued PCC
Use the daily Playing Conditions Calculation shown in the official scoring record. PCC is an automated statistical adjustment from -1 through +3, not a number chosen from personal weather impressions.
Apply the Rule 5.1a expression
Multiply 113 divided by Slope Rating by adjusted gross score minus Course Rating minus PCC, then round that round's differential to the nearest tenth as the rule requires.

Selection Changes as the Record Grows

Three to five scores

Use the lowest single differential, with a -2.0 adjustment for three scores, -1.0 for four, and no table adjustment for five.

Six to nineteen scores

Rule 5.2a increases the number of lowest differentials used in stages. The worksheet follows the official table rather than taking a fixed percentage of every short record.

Twenty scores

Rounding Is Part of the Rule, Not Display Decoration

Keep Index, Course Handicap, and Playing Handicap Separate

Know What the Authorized Record Adds

Official systems determine score acceptability, PCC provenance, expected-score treatment, the Low Handicap Index, soft and hard caps, exceptional-score reductions, and committee adjustments.
A Handicap Committee may modify an initial value using evidence of demonstrated ability that is not available to the calculator.
Check the current jurisdictional rules and official scoring record before a competition; this independent site is not affiliated with USGA, The R&A, GHIN, a club, or an association.
Use the estimate to audit entered values and rule-table steps, never to post a score, establish eligibility, allocate official strokes, or predict the next round.

Handicap for the exact tees you will play

What the calculation includes—and refuses to guess

Start with adjusted gross score

Match the exact course data

Enter the issued PCC

Apply the Rule 5.1a expression

Build One Score Differential for Every Round

Selection Changes as the Record Grows

Three to five scores

Six to nineteen scores

Twenty scores

Rounding Is Part of the Rule, Not Display Decoration

Keep Index, Course Handicap, and Playing Handicap Separate

Know What the Authorized Record Adds

Important limitations

Handicap for the exact tees you will play

What the calculation includes—and refuses to guess

Start with adjusted gross score

Match the exact course data

Enter the issued PCC

Apply the Rule 5.1a expression

Build One Score Differential for Every Round

Selection Changes as the Record Grows

Three to five scores

Six to nineteen scores

Twenty scores

Rounding Is Part of the Rule, Not Display Decoration

Keep Index, Course Handicap, and Playing Handicap Separate

Know What the Authorized Record Adds