Pars, Bogeys, Birdies Explained (And How They Score)

Par is the score a scratch golfer expects on a hole; a bogey is one over, a birdie is one under. That's the whole vocabulary. The genuinely useful part is what happens after you write those numbers down: your handicap doesn't come from your total score, it comes from your best eight of the last twenty score differentials adjusted for course rating and slope. Miss that and every casual round you post will confuse you.

What par, bogey and birdie actually mean

Par is set by the course, hole by hole, based on length and difficulty. A par 4 means a scratch player should need four shots: two to reach the green, two putts. Nothing about your own game changes that number.

From there the names stack up neatly. One under par is a birdie. Two under is an eagle. One over is a bogey, two over a double bogey, three over a triple. On a par 3, a hole-in-one is an ace and scores one under, so it's also an eagle.

The part that trips people up is that these words describe a hole, not a round. You can make three birdies and still shoot 95. Your scorecard doesn't care about the story, only the number in each box.

If you're new to posting scores, the arithmetic is the real hurdle, not the terminology. Our free golf handicap calculator at fairwayvip.com/calculator handles the differential math for you if you'd rather not do it by hand.

A worked example: from birdies to a handicap index

Say you're a member at a course with a course rating of 71.4 and a slope rating of 128. You shoot 88. The differential formula under the World Handicap System is:

(Adjusted gross score − course rating) × 113 ÷ slope rating

Plug in the numbers: (88 − 71.4) × 113 ÷ 128 = 16.6 × 113 ÷ 128 = 1875.8 ÷ 128 = 14.7. That single 14.7 is your differential for the round. It is not your handicap.

Now suppose your last twenty scores produce these eight lowest differentials: 9.1, 10.4, 11.2, 11.8, 12.3, 12.9, 13.5, 14.7. Add them: 96.0. Divide by eight: 12.0. Your handicap index is 12.0.

Note what happened there. The 88 with three birdies and a couple of doubles counted, but so did seven other rounds. One great day doesn't move your index much, and one disaster barely dents it, which is exactly the point of using eight of twenty.

Your index then converts to a course handicap for the tees you're playing:

Course handicap = handicap index × (slope rating ÷ 113) + (course rating − par)

With a 12.0 index on that 128-slope course: 12.0 × (128 ÷ 113) = 13.6, plus (71.4 − 72) = −0.6, giving 13.0. So you'd receive 13 strokes. On the hardest holes you get one; on the easiest you don't. That's where net birdies come from, and why a net 4 on a par 4 can genuinely win a hole.

If you want to see how your own numbers land, the handicap index calculator at fairwayvip.com/handicap-index walks through the same steps.

How many scores you need before any of this counts

You can't establish an index from one round. The World Handicap System requires a minimum of three 18-hole scores, and until you reach twenty, it uses a reduced table rather than the full eight-of-twenty.

• 3 scores posted: lowest 1 differential, minus 2.0
• 4 scores: lowest 1, minus 1.0
• 5 scores: lowest 1, no adjustment
• 6 scores: lowest 2, minus 1.0
• 7–8 scores: lowest 2
• 9–11 scores: lowest 3
• 12–14 scores: lowest 4
• 15–16 scores: lowest 5
• 17–18 scores: lowest 6
• 19 scores: lowest 7
• 20 scores: lowest 8

Once you have twenty, the oldest drops out each time you post a new one, so your index drifts rather than jumps. Post every acceptable round, including the ugly ones. Selectively posting only your good days is sandbagging in reverse and it will leave you with an index that doesn't travel.

One more practical note: the score you post is an adjusted gross score, capped at net double bogey on any hole. So a blow-up hole where you made a 9 gets recorded as whatever net double bogey is for you, which stops one bad hole from wrecking a differential. That's why bogeys matter more than birdies to most mid-handicappers. Pars and bogeys are the score you actually live on.

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