Strokes Gained Explained: The Guide for Amateur Golfers

Strokes gained measures how your performance compares to a benchmark, instead of counting good and bad shots. Every shot starts somewhere and ends somewhere, each of those spots has an expected number of strokes to hole out, and the difference between them, minus the one stroke you spent, is what you gained or lost. That's strokes gained explained in one sentence; the rest of this guide covers the arithmetic, the four categories, real amateur numbers, how to find your weakness, and the practice-side version. Practice Strokes Gained, or PSG, takes the same idea off the course and onto the range: The Adaptive Golfer practice system scores every drill against what a golfer at your handicap should do, so practice finally has a scoreboard.

Strokes gained explained: what does the number actually measure?

Strokes gained measures how much better or worse a shot was than a benchmark golfer's average from the same spot. It doesn't care how many strokes you took. Mark Broadie, the Columbia Business School professor who built the framework, defines it as "the decrease in the average number of strokes to finish the hole from the beginning of the shot to the end of the shot, minus one to account for the stroke taken." Positive means you beat the benchmark from that situation. Zero means you matched it. Negative means you fell short. Add up every shot and you have strokes gained for the round.

The explain-it-like-I'm-five version: every spot on the course has a price tag, the average number of strokes a benchmark golfer needs to hole out from there. A ball 150 yards out in the fairway costs less than a ball in the trees, and a 3-foot putt costs almost nothing. Your shot moves the ball from one price tag to another. Lower the price by more than the one stroke you spent and you gained. Lower it by less and you lost.

Two details hold the framework together. Broadie's benchmark depends on the distance to the hole and the lie, so 30 yards from sand and 30 yards from the fairway carry different price tags. And the number only means something once you name the benchmark. There's no universal strokes gained number; the same shot scores differently against the PGA Tour field, against scratch golfers, or against your handicap peers. Most explainers skip that step.

How is strokes gained calculated? A worked example

Take the benchmark's average strokes to finish from where the shot started, subtract the average from where it finished, and subtract one for the stroke you hit. Broadie works the example himself in his 2011 paper on assessing golfer performance. From 40 yards in the fairway, the Tour average is 2.6 strokes to finish. Hit that shot to 1 foot, where the average is 1.0, and the arithmetic is 2.6 − 1.0 − 1 = +0.6. Written formally, the strokes gained on any shot is J(start) − J(finish) − 1, where J is the average strokes remaining from a given distance and lie.

A 40-yard pitch to 1 foot is worth +0.6 strokes gained against Broadie's Tour benchmark.

The shot removed 1.6 expected strokes from the hole and cost one actual stroke, so the net is 0.6. A shot that removes exactly one expected stroke scores zero. And zero is fine. That's the benchmark golfer's average shot.

Golf Digest (2018) cites a Tour expected total of 1.874 strokes from 20 feet. Hole that putt and you gained 1.874 − 0 − 1 = +0.874. Two-putt it and you took two strokes against an expectation of 1.874, so you lost 0.126. A holed 20-footer gains 0.874 strokes; a two-putt from 20 feet loses just 0.126. That's why putts per round is a poor putting statistic: it treats a 3-foot tap-in and a 40-foot lag as the same event.

Penalties fit the same formula. In a 2014 reader Q&A on his book's site, Broadie worked the out-of-bounds case himself: −2 strokes gained, because after the penalty and the replay you're back where you started, two strokes poorer.

What are the four strokes gained categories?

The four standard categories are off-the-tee, approach-the-green, around-the-green, and putting. Every shot in a round lands in exactly one of them. The PGA Tour split its old tee-to-green number into the first three in 2016, and the definitions matter more than the labels, because two products that sort shots differently will hand you category totals you can't compare. Tee-to-green, the fifth row in the table, is just the first three added together. Here are the Tour definitions as reported by Golf Digest in 2016.

Three cautions before you compare your numbers to anyone else's. The Tour draws the around-the-green line at 30 yards from the green's edge; some consumer products draw it somewhere else, so check the cutoff before comparing. Par-3 tee shots count as approach shots. And "inside 100 yards" is a research and practice grouping rather than a strokes gained category, which matters for the two-thirds rule below.

What is a good strokes gained number for an amateur?

There's no single good number, because the value depends entirely on which benchmark you chose. Against your own handicap peers, zero is normal by definition. Against scratch, almost every category will be negative for almost every amateur, and the useful question becomes which category is most negative rather than how negative. The best published amateur figures state their sample and benchmark, and the most instructive one shows how much the answer varies inside a single handicap range.

In February 2023, Golf Digest and Arccos analyzed 1,000 Arccos golfers with handicaps between 7 and 9, split them into six clusters, and measured every figure against a scratch golfer. The cluster closest to breaking 80, labeled "80s shooter No. 1," lost 1.777 strokes per round off the tee, 2.403 on approach, 0.522 around the green, and 1.448 putting, averaging 255 yards off the tee. Those decimals belong to that one cluster, not to all 1,000 golfers. Two other clusters show why the category question matters: the "Yippy Putters" lost 3.621 strokes putting alone; the "Disaster Shotmakers" lost 6.293 tee-to-green.

In the Golf Digest and Arccos study, the cluster of 7-to-9 handicappers closest to breaking 80 lost 2.403 strokes per round on approach shots against scratch, more than in any other category.

Same handicap range, opposite diagnoses. That's one study against one benchmark, and we couldn't find a published cross-provider table covering every band, so treat any complete "a 15-handicap loses X in every category" table with suspicion. What does exist is raw outcome data, worth pairing with strokes gained because raw counts explain the mechanism while strokes gained prices the cost. From Shot Scope's published benchmark ebook:

• Greens in regulation were 61% for scratch golfers, 44% for 5-handicappers, and 36% for 10-handicappers.
• Putts per round rose from 29.4 for scratch golfers to 31.2 for 10-handicappers and 33.8 for 25-handicappers.
• Penalty shots per round were 0.56 for scratch golfers, 1.62 for 10-handicappers, 2.45 for 15-handicappers, and 4.67 for 25-handicappers.
• Fairways hit were 50% for scratch golfers and 46% for 20- and 25-handicappers, a gap of just 4 percentage points.

A 25-handicapper takes 4.67 penalty shots per round, versus 0.56 for a scratch golfer.

Is strokes gained worth it for a 15 handicap?

Yes, on two conditions: the benchmark has to fit you, and you have to wait for a pattern instead of reacting to one round. A 15-handicap comparing every shot to the PGA Tour learns that the Tour is better at golf, which wasn't in doubt. Comparing against other 15-handicaps shows which part of your game sits below peer level; comparing against a target handicap quantifies the gap to where you want to be. Shot Scope's system, per its 2024 documentation, lets users pick a handicap comparison range and recalculates the result; Arccos's 2020 explainer states that it benchmarks against a scratch golfer. Both are legitimate. They answer different questions, and −1.0 on approach means something different under each.

The pattern condition matters just as much. Golf Digest raised a sample-size problem with strokes gained statistics even on the PGA Tour in 2018. A single round's category total is one observation of a high-variance process, and no published source we could find names the round count at which an amateur's strokes gained becomes a reliable diagnosis, so treat any specific "five rounds" rule as unsupported. Aggregate across rounds and act on whatever pattern persists. The hot or cold Saturday is noise. For a 15-handicap the number to sit with is 2.45 penalty shots per round against 0.56 for scratch, roughly two strokes a round in target and club choice before any swing change. Once the category is named, how to lower your golf handicap covers what to do next.

Does the two-thirds rule mean you should stop practicing your short game?

No. The rule is real, but it answers a different question than most people think. In his 2008 research paper comparing low-handicap amateurs with Tour players, Broadie reported that matching the professionals would require the amateurs, a group scoring 70 to 83, to gain 9.3 strokes per round in the long game, 2.2 in putting, 1.4 in the short game, and 0.7 in sand play, with the long game defined as shots over 100 yards from the target. His public summary: "Roughly about two-thirds of a 10-stroke difference comes from shots outside of 100 yards and about one-third comes from shots inside 100 yards," a pattern he said holds across hugely different skill levels.

Broadie's research attributes 9.3 strokes per round of the amateur-to-professional gap to shots over 100 yards, against 2.2 for putting.

That's a statement about score separation between groups: which skills explain why a low-handicap amateur shoots 78 and a Tour player shoots 68. It says nothing about where you hit the most shots, and it's no instruction to practice in two-thirds-to-one-third proportions. The usual counter-argument is that amateurs take more of their strokes inside 100 yards. Both can hold at once, because counting where strokes happen and measuring which skills explain the gap are different questions.

The Adaptive Golfer keeps the two straight in Chapter 9. The long game is where the gap between handicap levels lives. The scoring zone is where the most strokes are reclaimable per hour of practice, because eliminating three-putts and tightening wedge proximity respond to structured practice in weeks, while adding clubhead speed and shrinking approach dispersion takes months. Either way, start with your own pattern. The population average is somebody else's diagnosis.

Why do most amateurs get the diagnosis wrong?

Most amateurs get the diagnosis wrong because they read raw statistics, trust one round, and never name the benchmark. Each mistake points practice at the wrong thing. A golfer who "three-putts a lot" spends a winter on the putting green while the strokes were actually leaking from approach shots that left 40-foot first putts. Two misreads come up again and again.

Putts per round. Thirty putts can be excellent putting after 18 long lag putts or poor putting after 18 short ones. Strokes gained putting adjusts for the starting distance of every putt. The raw count doesn't.

The worst category is a swing flaw. Provider diagnostics break each category into penalties, recoveries, lie, distance, and miss direction because strategy is often the loss. Two out-of-bounds tee shots are a decision problem before they're a technique problem.

I have some standing to say this, because I made the first mistake for years. The Arccos analysis that started the whole project behind the book showed my ball striking gaining 0.3 strokes against a 3-handicap baseline while my short game was losing 2.8. I'd spent years practicing the thing I was already good at, because I enjoyed being good at it. The data was less sentimental.

How do you use strokes gained to find your weakness?

Use strokes gained to find your weakness by naming the benchmark first, reading the four-category totals across several rounds, and then splitting the most negative category by situation until you reach a cause you can actually practice. The category is never the answer; it's the address. "I lose strokes off the tee" could mean dispersion, penalties, poor recoveries, or the wrong club, and each has a different fix. The protocol takes one honest month.

1. Name the benchmark. Scratch, your current handicap band, or a target band. Write it on the chart; every number that follows is relative to it.
2. Record every shot, including the ugly ones. Strokes gained needs the start and end position and lie of each stroke. A missing penalty points you at the wrong category. Fix the record before you read it.
3. Read the four-category totals only after several rounds. The most negative category against your chosen benchmark is the first candidate, not the one that felt worst last Sunday.
4. Split the weak category by situation. Off-the-tee into dispersion, penalties, and recoveries; approach by distance band, greens hit, and miss direction; putting from 3 feet out to lag range. The split is where the actionable cause lives.
5. Pull penalties out as their own line. They hide inside off-the-tee and approach, they grow fastest as handicap rises, and a strategy change usually fixes them faster than a lesson would.
6. Convert the cause into one controllable objective. Approach losses in one yardage band become distance control at that band; tee losses from penalties become a target and a club that keep the ball in play. One objective, then the drills that train it.
7. Re-measure against the same benchmark. Change the benchmark and you've changed the ruler. Same reference, same definitions, next batch of rounds.

Can you track strokes gained without a sensor?

Yes. Strokes gained is a subtraction, and nothing about it requires a sensor; you can run it with a pencil and a scorecard. You record one row per stroke with seven fields (hole and shot number, start lie and distance to the hole, end lie and distance, penalty strokes, and whether it was holed), look up the expected strokes at both ends, apply J(start) − J(finish) − 1, and reconcile each hole against your actual score to catch anything you missed. The full protocol, with the recording sheet and the reconciliation check, is in how to track strokes gained without a sensor.

Three honest limits. The free public table is Broadie's own appendix in the 2011 paper, Tour averages from tee, fairway, rough, sand, and recovery by distance in 10-yard steps, so it's coarse. Its baseline is the PGA Tour, so a hand calculation tells you how you compare to Tour players rather than to golfers like you. And a sensor fixes neither; a tracker automates the recording and leaves the benchmark question where it found it. How practice apps compare sets out the difference between round-tracking and practice-measurement tools.

What is Practice Strokes Gained (PSG)?

Practice Strokes Gained is the simplified, practice-side version of strokes gained that The Adaptive Golfer introduces in Chapter 3. Every drill in the system has a benchmark range for each handicap band. When you complete a drill, you compare your result to the benchmark for your current band. A result above the benchmark means a Practice Strokes Gained value greater than zero: your practice performance in that skill is ahead of your overall game. A result below it means that skill is lagging behind the rest of your game. The Adaptive Golfer practice system runs that comparison automatically on every logged result, and what Practice Strokes Gained is and how to use it walks through a full session.

On the range there's no hole-out, so the full calculation has nothing to run on. What you do have is a repeatable drill with a fixed setup and a success criterion, compared against what golfers at each handicap level actually produce in it. Here are the standards for five scored drills, exactly as the system stores them; the benchmark pages hold every drill in every band. The book's tables run to 24; handicaps of 25 and up file in the 20+ band.

A 14-to-19 handicap should put 4 to 6 of 10 iron shots cleanly through the gate in the Gate Drill.

An 8-to-13 handicap should finish 8 to 10 of 15 lag putts inside a 3-foot radius in the Lag Putting Ladder.

A 3-to-7 handicap should score 22 to 25 points out of 27 in the 9-Shot Landing Zone.

Here's how a logged result becomes a score. Take the Gate Drill: ten iron shots through a gate of alignment sticks set 12 to 14 inches apart, counting the clean passes. A 15-handicap sits in the 14–19 band, where the standard is 4 to 6. Log 4, 5, or 6 and the result is at band; log 3 and it's below; log 7 and it's above. The system also places that result on a scale from −2.0 to +2.0, with the center of your band at 0 and its edges at ±1.0, so 6 out of 10 scores +1.0, 5 scores 0, and 3 and 7 saturate at −2.0 and +2.0. For lower-is-better drills the scale flips: Worst-Ball Scoring carries a 14–19 standard of 15 to 19 strokes, so a 13 there is above band.

Two golfers who both play to 14 can look nothing alike under this measurement, because a handicap averages every skill into one index and PSG pulls them back apart. The pillar of the 5 Pillars sitting furthest below its band is the one costing you the most strokes and the first one to address. Run the Lag Putting Ladder alongside the Gate Drill and you've got the first two data points of your own profile inside an hour.

The practice-side number matters because it leads. The book's working rule is that practice results in a skill tend to show up on the course two to four weeks later, and that the trend is visible after four or five tracked sessions. Score is a lagging indicator. Practice Strokes Gained is the week-by-week signal, the measure step of the Adaptive Loop that makes the adjust step possible.

Start measuring your practice, not just your rounds

Strokes gained on the course tells you which category is costing you. Practice Strokes Gained tells you whether the work you're doing about it is working, weeks before your handicap will. Name the category, pick the drill that trains it, log the result against your band. How the method works lays out the full loop from diagnosis to plan to measurement, and you can start a free trial to score your first drill today; the pricing page shows what the trial includes.

Everything here comes from The Adaptive Golfer, the published system behind the app (Chapters 3 and 9); the book has the complete benchmark tables and the full drill library. The strokes gained framework is Mark Broadie's; the definition and worked example above are quoted from his 2011 paper.