About the Greens in Regulation Calculator
Greens in regulation (GIR) percentage — the strongest predictor of golf scoring.
Also known as: gir percentage, greens hit, gir calculator.
How to use this calculator
- Enter greens in regulation, holes played.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Open “Step-by-step” to see how the answer was worked out.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
GIR percentage = Greens in regulation ÷ Holes played × 100
Worked example
Using the values pre-filled in the calculator above:
- Greens in regulation = 8
- Holes played = 18
the calculator returns:
- GIR percentage: 44.44%
Working
GIR percentage = 8 ÷ 18 × 100 = 44.4444%