About ModusGolf

ModusGolf is a free set of golf calculators, plus a museum, guides, and a blog, built around one job: turning numbers you already have — a scorecard, a course rating, a swing speed — into something you can actually use on the course. There’s no sign-up, and nothing on the page is for sale beyond the ads that keep it running. Here’s what’s actually here.

Working out your handicap, one step at a time

Three tools cover the handicap side of the game, and they’re meant to be used in sequence. Start with the Golf Handicap Differential Calculator, which turns a single round’s score, course rating, and slope into the normalised differential the World Handicap System is built on. Run enough rounds through it and you can feed the results into the Golf Handicap Index Calculator, which takes your recent differentials, works out how many of them count, and produces a handicap index. From there, the Golf Course Handicap Calculatorconverts that index into the actual strokes you receive on a specific set of tees, using that course’s slope, rating, and par. Used together, the three answer the question most golfers actually have: not “what’s my index,” but “how many shots do I get today.”

Scoring a round under Stableford

The Stableford Points Calculatorhandles the other common scoring format. Enter each hole’s par, the strokes you took, and the strokes you received, and it works out the points for that hole and your running total. It’s built for club and society rounds played under points rather than strict stroke play, where one blow-up hole shouldn’t wreck the whole card.

What your swing is actually worth

Two tools deal with distance rather than scoring. The Golf Swing Speed to Distance Calculator takes your clubhead speed and smash factor and estimates the ball speed, carry, and total distance that combination produces — useful for seeing whether a faster swing or better contact would do more for your distance. The Golf Shot Distance Adjustertakes a stock carry number and adjusts it for temperature, altitude, and uphill or downhill elevation, so the number you use for club selection reflects the conditions you’re actually playing in rather than a range-day average.

Beyond the calculators

Past the tools, The Golf Museum is a set of galleries on the equipment and clubs that shaped the game, the great courses, the history and majors, and the players who defined it — every entry, image, and fact is drawn from Wikipedia and Wikimedia Commons rather than written in-house. The learn section and the bloghold the longer articles that don’t fit inside a calculator: swing mechanics, club fitting, course strategy, and practice planning.

What this site is, and isn’t

ModusGolf is an independent, ad-supported site. It isn’t the USGA, the R&A, a golf club, or an equipment brand, and it isn’t affiliated with any of them. The handicap tools follow the published mechanics of the World Handicap System as closely as they can be implemented here, but they don’t produce an official handicap and won’t be accepted as one — for that, use your club’s system of record. Every number the tools return — distance, points, differential, index, course handicap — is an estimate built from whatever you type in. It’s general information, not professional coaching, medical, or fitness advice, and it can’t account for your actual swing, equipment, or physical condition; use your own judgement, and for anything involving your technique or your body, a qualified instructor or medical professional. If a result looks wrong or you want a tool that doesn’t exist yet, the contact page has an email address for it.