Golf Handicap Calculator
:root {
–primary-blue: #004a99;
–success-green: #28a745;
–light-background: #f8f9fa;
–border-color: #dee2e6;
–text-color: #212529;
–label-color: #495057;
}
body {
font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
background-color: var(–light-background);
color: var(–text-color);
line-height: 1.6;
margin: 0;
padding: 20px;
}
.loan-calc-container {
max-width: 800px;
margin: 40px auto;
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
border: 1px solid var(–border-color);
}
h1, h2 {
color: var(–primary-blue);
text-align: center;
margin-bottom: 25px;
}
.input-group {
margin-bottom: 20px;
padding: 15px;
border: 1px solid var(–border-color);
border-radius: 5px;
background-color: #fdfdfd;
}
.input-group label {
display: block;
margin-bottom: 8px;
font-weight: 600;
color: var(–label-color);
}
.input-group input[type="number"] {
width: calc(100% – 12px);
padding: 10px;
border: 1px solid var(–border-color);
border-radius: 4px;
font-size: 1rem;
margin-top: 5px;
}
.input-group input[type="number"]:focus {
outline: none;
border-color: var(–primary-blue);
box-shadow: 0 0 0 2px rgba(0, 74, 153, 0.25);
}
button {
display: block;
width: 100%;
padding: 12px 20px;
background-color: var(–primary-blue);
color: white;
border: none;
border-radius: 5px;
font-size: 1.1rem;
font-weight: 600;
cursor: pointer;
transition: background-color 0.3s ease;
margin-top: 10px;
}
button:hover {
background-color: #003366;
}
#result {
margin-top: 30px;
padding: 25px;
background-color: var(–success-green);
color: white;
text-align: center;
border-radius: 6px;
box-shadow: 0 2px 10px rgba(40, 167, 69, 0.3);
}
#result h3 {
margin-top: 0;
color: white;
font-size: 1.5rem;
margin-bottom: 10px;
}
#calculated-handicap {
font-size: 2.5rem;
font-weight: bold;
display: block; /* Ensure it takes its own line */
}
.article-section {
margin-top: 40px;
background-color: #ffffff;
padding: 30px;
border-radius: 8px;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
border: 1px solid var(–border-color);
}
.article-section h2 {
text-align: left;
color: var(–primary-blue);
margin-bottom: 20px;
}
.article-section p, .article-section ul, .article-section li {
margin-bottom: 15px;
color: var(–label-color);
}
.article-section ul {
list-style-type: disc;
margin-left: 20px;
}
.article-section li {
margin-bottom: 8px;
}
@media (max-width: 768px) {
.loan-calc-container {
margin: 20px auto;
padding: 20px;
}
h1 {
font-size: 1.8rem;
}
button {
font-size: 1rem;
}
#calculated-handicap {
font-size: 2rem;
}
}
Golf Handicap Calculator
Calculate your golf handicap using your recent scores. A lower handicap indicates a more skilled golfer.
Your Estimated Handicap Index
Understanding Golf Handicap Calculation
A golf handicap is a numerical measure of a golfer's potential ability. It allows players of different skill levels to compete against each other on an equitable basis. The official system used by most golfing bodies is governed by the World Handicap System (WHS), which aims to standardize handicaps worldwide.
The core idea is to compare a golfer's score on a particular course to the expected score for that course. The handicap system adjusts for the difficulty of the course (Course Rating and Slope Rating) and uses a golfer's best recent performances to establish their handicap index.
Key Components:
- Score Differential: This is the fundamental calculation for each round. It measures how well a player performed relative to the difficulty of the course they played. The formula is:
Score Differential = (Adjusted Gross Score - Course Rating) * (113 / Slope Rating)
Where:
- Adjusted Gross Score: This is your actual score for the round, but with certain maximum scores applied per hole to prevent one very bad hole from overly inflating your handicap. For most recreational players, this is often the same as their gross score.
- Course Rating: This is the USGA's evaluation of the playing difficulty of a course for scratch golfers and players who are expected to score about the same. It is expressed as strokes taken to one decimal place, and it represents the average gross score that a scratch golfer would achieve on that course.
- Slope Rating: This measures the relative difficulty of a course for a bogey golfer compared to a scratch golfer. A higher slope rating means the course is significantly harder for non-scratch golfers. The average slope rating is 113.
- Handicap Index: The Handicap Index is calculated using the Score Differentials from a golfer's most recent 20 scores. The system takes the best 8 Score Differentials from that set of 20 and averages them. This average is your Handicap Index.
If you have fewer than 20 scores, the number of scores used to calculate the average is adjusted accordingly (e.g., 7 scores used for the average from 10 total scores).
How the Calculator Works:
This calculator provides an estimation based on a single round. It calculates the Score Differential for the round you input using the formula:
Score Differential = (Your Score - Course Rating) * (113 / Slope Rating)
To get an official Handicap Index, you would typically need to submit multiple scores (ideally 20) to a golf club or authorized association. This calculator simplifies the concept by showing you the potential score differential from one round, which is a building block for your official handicap. A lower score differential means you played better relative to the course's difficulty.
Example Usage:
Let's say you play a round of golf and your score is 92. The course you played has a Course Rating of 71.8 and a Slope Rating of 125.
Using the calculator:
- Course Rating: 71.8
- Slope Rating: 125
- Your Score: 92
The calculation would be:
Score Differential = (92 - 71.8) * (113 / 125)
Score Differential = (20.2) * (0.904)
Score Differential ≈ 18.26
This 18.26 is your Score Differential for that round. If this were one of your best 8 scores out of the last 20, it would contribute to lowering your overall Handicap Index.
function calculateHandicap() {
var courseRating = parseFloat(document.getElementById("courseRating").value);
var slopeRating = parseFloat(document.getElementById("slopeRating").value);
var score = parseFloat(document.getElementById("score").value);
var resultDiv = document.getElementById("result");
var calculatedHandicapSpan = document.getElementById("calculated-handicap");
// Basic validation
if (isNaN(courseRating) || isNaN(slopeRating) || isNaN(score) || courseRating <= 0 || slopeRating <= 0 || score < 0) {
alert("Please enter valid positive numbers for Course Rating, Slope Rating, and Your Score.");
resultDiv.style.display = "none";
return;
}
if (slopeRating === 0) {
alert("Slope Rating cannot be zero.");
resultDiv.style.display = "none";
return;
}
// Calculate Score Differential (simplified for single round display)
// This is a component of the Handicap Index, not the full index itself without multiple scores
var scoreDifferential = (score – courseRating) * (113 / slopeRating);
// Display the calculated Score Differential as an 'estimated handicap component'
// In a real system, this would be part of a larger calculation involving multiple rounds.
// We'll round it to two decimal places for clarity.
calculatedHandicapSpan.textContent = scoreDifferential.toFixed(2);
resultDiv.style.display = "block";
}