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Golf Handicap Calculator

Calculate your WHS handicap index from recent scores

Handicap Index

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Course HC

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Rounds Used

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Round 1
Round 2
Round 3
Round 4
Round 5

Standard slope is 113

Handicap Index

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Course Handicap

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Avg Differential

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Best 0 of 0 Differentials

Adjustment: undefined

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Bushnell Tour V5 Shift Laser Golf Rangefinder

Bushnell Tour V5 Shift Laser Golf Rangefinder

$250-$3504.6
View on Amazon

Callaway Supersoft 2023 Golf Balls 12-Pack

$22-$304.7
View on Amazon

FootJoy WeatherSof Golf Glove 2-Pack

$18-$254.6
View on Amazon

Swix Universal Ski Wax Kit with Iron & Brushes

$45-$654.5
View on Amazon
Smith Vantage MIPS Ski Helmet Medium

Smith Vantage MIPS Ski Helmet Medium

$180-$2504.7
View on Amazon

Outdoor Master OTG Ski Goggles Anti-Fog UV400

$25-$404.5
View on Amazon

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Frequently Asked Questions

Q

How is a golf handicap index calculated under WHS?

The World Handicap System calculates your handicap index by averaging the best 8 of your last 20 score differentials. Each differential equals (Adjusted Gross Score - Course Rating) x 113 / Slope Rating. With fewer than 20 rounds, fewer differentials are used with possible adjustments.

  • 20 rounds: best 8 differentials averaged
  • 10 rounds: best 3 differentials averaged
  • 5 rounds: best 1 differential minus 1.0 adjustment
  • 3 rounds (minimum): best 1 differential minus 2.0 adjustment
  • Maximum handicap index: 54.0 for all golfers
Rounds AvailableDifferentials UsedAdjustment
31-2.0
51-1.0
1030
1550
2080
Q

What is the difference between handicap index and course handicap?

Handicap index is your portable measure of playing ability, while course handicap adjusts it for a specific course. Course Handicap = Handicap Index x (Slope Rating / 113) + (Course Rating - Par). A 15-index player gets more strokes on a harder course.

  • Handicap index: universal, based on your scoring history
  • Course handicap: course-specific, adjusts for difficulty
  • Slope 113 (standard) = course HC equals index
  • Slope 140 (hard) = course HC is higher than index
  • Slope 90 (easy) = course HC is lower than index
IndexCourse HC (Slope 113)Course HC (Slope 140)Course HC (Slope 90)
10.010128
15.0151912
20.0202516
25.0253120
Q

What is a good golf handicap for an average golfer?

The average male golfer has a handicap index of about 14.2 and the average female golfer about 27.5 according to USGA data. A single-digit handicap (under 10) places you in the top 25% of all golfers. Scratch (0) golfers represent roughly the top 1%.

  • Scratch (0): top ~1% of golfers, shoots par or better
  • Single digit (1-9): top ~25%, consistently under 82
  • Mid-range (10-18): average to above-average golfer
  • High handicap (19-28): typical recreational golfer
  • Beginner (29-54): new to golf or infrequent player
Handicap RangeTypical Score (Par 72)Skill Level% of Golfers
0-572-77Excellent~10%
6-1278-84Good~20%
13-2085-92Average~35%
21-2893-100Casual~25%
29-54101+Beginner~10%
Q

How many rounds do I need to establish a handicap?

Under the World Handicap System, you need a minimum of 3 scored rounds (54 holes) to establish a handicap index. However, with only 3 rounds the system uses your single best differential minus a 2.0 adjustment, so accuracy improves with more rounds.

  • Minimum 3 rounds (54 holes) required for initial index
  • 3-5 rounds: only 1 differential used, with -1.0 to -2.0 adjustment
  • 6-8 rounds: 2 differentials used, more stable
  • 10+ rounds: 3+ differentials, reasonably accurate
  • 20 rounds: full 8-differential calculation, most accurate
Q

What is a handicap differential in golf?

A handicap differential measures how you performed relative to the course difficulty. It equals (Adjusted Gross Score - Course Rating) x 113 / Slope Rating. The 113 normalizes all differentials to a standard slope, making scores from different courses directly comparable.

  • Formula: (Score - Course Rating) x 113 / Slope Rating
  • 113 is the standard slope rating (average difficulty)
  • Lower differential = better performance relative to course
  • A differential of 10.0 means ~10 strokes above course rating on standard slope
  • Net double bogey is maximum score per hole for handicap purposes
ScoreCourse RatingSlope RatingDifferential
Example 18572.011314.6
Example 28572.013512.2
Example 39068.512519.4
Example 47872.01136.7

Example Calculations

1Mid-Handicap Golfer with 5 Rounds

Inputs

Scores92, 88, 95, 90, 87
Course Rating72.0 (all rounds)
Slope Rating113 (all rounds)

Result

Handicap Index14.0
Best Differential15.0
Differentials Used1 of 5
Adjustment-1.0

Differentials: (92-72)*113/113=20.0, (88-72)*113/113=16.0, (95-72)*113/113=23.0, (90-72)*113/113=18.0, (87-72)*113/113=15.0. Best 1 of 5 = 15.0. With 5 rounds, adjustment = -1.0. Index = 15.0 + (-1.0) = 14.0.

2Low Handicap with 20 Rounds on Varied Courses

Inputs

Best 8 Differentials3.2, 4.1, 4.5, 5.0, 5.2, 5.8, 6.0, 6.3
Target CourseRating 73.5, Slope 140, Par 72

Result

Handicap Index5.0
Avg Best 85.01
Course Handicap8
Differentials Used8 of 20

Sum of best 8 = 3.2+4.1+4.5+5.0+5.2+5.8+6.0+6.3 = 40.1. Average = 40.1/8 = 5.0125, rounded to 5.0. Course HC = 5.0*(140/113)+(73.5-72) = 6.19+1.5 = 7.69, rounded to 8.

3Beginner Establishing Handicap with 3 Rounds

Inputs

Scores105, 110, 102
Course Rating70.5
Slope Rating125

Result

Handicap Index26.5
Best Differential28.5
Differentials Used1 of 3
Adjustment-2.0

Differentials: (105-70.5)*113/125=24.9, (110-70.5)*113/125=35.7, (102-70.5)*113/125=28.5. Best 1 = 24.9. Wait - sorted: 24.9, 28.5, 35.7. Best = 24.9. With 3 rounds, adjustment = -2.0. Index = 24.9 + (-2.0) = 22.9. Hmm, let me recheck: (102-70.5)*113/125 = 31.5*113/125 = 28.5. (105-70.5)*113/125 = 34.5*0.904 = 31.2. Best = 28.5. Index = 28.5 - 2.0 = 26.5.

Formulas Used

Handicap Differential

Differential = (Adjusted Gross Score - Course Rating) × 113 / Slope Rating

Calculates a normalized score differential that accounts for course difficulty.

Where:

Adjusted Gross Score= Score after net double bogey adjustment per hole
Course Rating= Expected score for a scratch golfer (e.g., 72.0)
Slope Rating= Course difficulty for bogey golfer vs scratch (55-155, standard 113)
113= Standard slope rating used for normalization

Handicap Index

Index = (Sum of Best N Differentials / N) + Adjustment

Averages the best differentials from recent rounds. N and adjustment depend on rounds available.

Where:

N= Number of differentials used (1-8 based on rounds available)
Best N Differentials= Lowest N differentials from your last 20 rounds
Adjustment= Correction factor for few rounds (-2.0 to 0)

Course Handicap

Course HC = Handicap Index × (Slope Rating / 113) + (Course Rating - Par)

Converts your portable handicap index to strokes received on a specific course.

Where:

Course HC= Number of strokes you receive on this course (rounded)
Handicap Index= Your WHS handicap index
Slope Rating= Target course slope rating
Course Rating= Target course rating
Par= Target course par (usually 72)

Understanding the World Handicap System

The World Handicap System (WHS), introduced in 2020, unified six different handicap systems worldwide into one portable standard. Your handicap index travels with you to any course in any country, and the course handicap calculation adjusts for local difficulty using the slope and course rating.

The key innovation of WHS is the handicap differential: (Adjusted Gross Score - Course Rating) x 113 / Slope Rating. By normalizing to a standard slope of 113, the system makes a round shot on a municipal course directly comparable to one played at Augusta National. Your index uses the best 8 of your last 20 differentials, which captures your demonstrated ability rather than average performance.

This calculator implements the full WHS algorithm including the sliding scale for fewer than 20 rounds, the adjustment factors for 3-6 round histories, and the course handicap conversion for any target course. Enter your scores with their course and slope ratings to instantly see your handicap index and playing handicap.

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Last Updated: Mar 25, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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