About this tool
The Golf Course Handicap Calculator converts your World Handicap System (WHS) Handicap Index into the number of strokes you actually receive on a given set of tees. It uses the official WHS formula Course Handicap = Handicap Index × (Slope Rating / 113) + (Course Rating − Par), rounded to the nearest whole number. The value 113 is the neutral slope of a course of standard difficulty, and slope ratings run from 55 (easiest) to 155 (hardest).
This tool assumes you already know your Handicap Index — it is a tee-to-strokes converter, not an Index calculator — so it complements rather than duplicates a handicap-index tool. Enter your Index plus the tee's Slope Rating, Course Rating, and Par, and it returns both the unrounded figure and the rounded Course Handicap you would use for that tee.
Many competitions apply a handicap allowance — for example 95% of Course Handicap in a stroke-play field or 90% in fourball — to keep results equitable. Enter an allowance percentage (default 100%) and the calculator also reports your Playing Handicap = Course Handicap × allowance, rounded. Everything is computed locally in your browser, so your figures never leave your device.