HANDICAP TOOLS
9-Hole Handicap Calculator and Score Guide
A nine-hole handicap calculation starts with the rating for the nine you played. Use this page to find the nine-hole component and understand which published conversion your scoring record still needs.
Calculate a nine-hole component
This page calculates a partial nine-hole value and can analyze a final official 18-hole equivalent. A raw nine alone does not produce an index.
Enter your values or load the clearly labeled example to begin.
Keep your scoring record
Personal-use estimate. This tool does not issue an official handicap and cannot certify eligibility for a competition. Obtain your official handicap through your national association or affiliated club.
How to use this tool
- Select the region and enter the adjusted nine-hole score and nine-hole ratings.
- Review the component and the explanation of official expected-score or combined-score processing.
- Replace a pending component with its published final equivalent when your authorized service provides it.
How we calculate
A nine-hole component uses (113 ÷ nine-hole slope) × (adjusted nine-hole score − nine-hole Course Rating − half the 18-hole PCC). It is a component, not a finished 18-hole differential.
Worked example
With 45 strokes, nine-hole rating 36, slope 113 and PCC 0, the component is 9.0. It must not be doubled to 18.0 or substituted for an official converted differential.
| Input or rule | What it means |
|---|---|
| 18-hole PCC −1 | Nine-hole PCC adjustment −0.5 |
| 18-hole PCC 0 | Nine-hole PCC adjustment 0 |
| 18-hole PCC +1 | Nine-hole PCC adjustment +0.5 |
| Three nine-hole rounds | 27 actual holes, not 54 |
Limits and common mistakes
Use ratings for the nine actually played. Different regions handle nine-hole completion differently; this tool does not invent an expected score.
Model version: 2026-10-19. Reference: USGA nine-hole score guide.
Frequently asked questions
Why can’t I double my nine-hole score?
The second nine is not necessarily equivalent. The applicable system may add an official expected-score component.
Which Course Rating should I use?
The rating published for your selected nine and tees, not the full-course rating divided by two.
Can three nines establish the same record as three 18s?
No. Three nines are 27 holes; the initial-history requirements must still be met.
How do I enter a converted round?
Use the final differential from your authorized service and identify the source entry it replaces.
Does Australia use the same conversion?
No. Use the published Australian combined record where applicable; this tool does not automatically pair unrelated nines.