Sports & Gaming · Statistics · Descriptive Statistics
Golf Strokes Gained Calculator
Calculate strokes gained for any shot by comparing your starting and finishing expected scores to the tour benchmark.
Calculator
Formula
Strokes Gained (SG) equals the benchmark expected strokes from the starting position minus the benchmark expected strokes from the finishing position minus 1 (for the stroke taken). A positive value means the shot outperformed the tour average; negative means it underperformed.
Source: Broadie, Mark. 'Every Shot Counts.' Gotham Books, 2014. Methodology adopted by PGA Tour ShotLink system.
How it works
The core formula is: Strokes Gained = Expected Strokes (Start) − Expected Strokes (Finish) − Shots Taken. The 'expected strokes' values are tour-average benchmarks derived from millions of PGA Tour shots — they represent how many strokes an average tour professional would need to hole out from a given situation (distance, lie, and course location). Subtracting the finish benchmark and the actual strokes used from the start benchmark isolates the contribution of your shot(s) relative to that average.
A strokes-gained value of +1.0 means you performed one full stroke better than a tour average player would have from the same starting position. Values near 0 indicate tour-average performance; negative values indicate below-average performance. Because it accounts for both the difficulty of the starting position and the quality of the finish, strokes gained eliminates the bias in traditional stats like greens in regulation or fairways hit.
Strokes gained can be applied to any shot category: off the tee (SG:OTT), approach the green (SG:APP), around the green (SG:ARG), and putting (SG:PUTT). Summing across categories gives total strokes gained (SG:TOT), which directly equals score relative to the field average.
Worked example
Scenario: A golfer hits a drive from the tee on a 450-yard par-4. The tour benchmark expected strokes from the tee on a 450-yard par-4 is approximately 3.93 strokes. The drive lands in the fairway 150 yards from the pin; the benchmark from that position is approximately 2.72 strokes.
Step 1 – Identify inputs: Start expected = 3.93, Finish expected = 2.72, Shots taken = 1.
Step 2 – Apply the formula: SG = 3.93 − 2.72 − 1 = +0.21 strokes.
Interpretation: The golfer gained 0.21 strokes on the field with that drive — meaning they hit the ball about one-fifth of a stroke better than a tour average player would from the same tee box. Over a round of 14 drives that average +0.21, that would add up to approximately +2.94 strokes gained off the tee for the round.
Putting Example: A player faces a 20-foot putt; the benchmark is 1.96 strokes (expected). They make the putt — finish expected = 0 (in the hole). SG = 1.96 − 0 − 1 = +0.96 strokes gained on that single putt.
Limitations & notes
The accuracy of strokes gained calculations depends entirely on the quality of the benchmark expected-strokes values you input. Official PGA Tour benchmarks are proprietary and based on millions of ShotLink-tracked shots; amateur benchmarks differ significantly. Using tour benchmarks for amateur golfers will yield misleading results — separate amateur baseline tables (published by researchers like Broadie and organizations like the USGA) should be used when available. Additionally, this calculator does not differentiate between lie types (rough vs. fairway vs. sand) at the same distance, which can significantly affect the expected-strokes baseline. For high-fidelity analysis, always use the most specific benchmark available for your exact situation, distance, and lie. Finally, strokes gained is a descriptive statistic — it measures outcomes, not swing quality, and can be influenced by luck on any individual shot.
Frequently asked questions
What does a strokes gained value of 0 mean?
A strokes gained value of exactly 0 means you performed exactly at the tour average for that shot or sequence of shots. You neither gained nor lost ground on the field from that position.
Where do the 'expected strokes' benchmark values come from?
Benchmark expected-strokes values are derived from large datasets of tracked shots. The PGA Tour uses its proprietary ShotLink system, which has captured over 60 million shots. Mark Broadie published comprehensive benchmark tables in 'Every Shot Counts' (2014), and the USGA has also published amateur-level benchmarks. You should enter the value appropriate for your competitive level.
Can I use strokes gained for putting alone?
Yes. Strokes gained putting (SG:PUTT) is one of the most common applications. The finish expected strokes is 0 if the putt is made (ball is in the hole) or the benchmark for the remaining distance if the putt is missed. The PGA Tour's putting benchmark table gives expected putts by distance, ranging from about 1.00 from inside 1 foot to 2.40 from 40 feet.
How is strokes gained different from traditional golf statistics?
Traditional stats like fairways hit, greens in regulation, and putts per round are all flawed because they ignore context. For example, 30 putts in a round could be excellent (if all approaches were from 30+ feet) or poor (if all approaches were tap-ins). Strokes gained always benchmarks each shot against what an average player would do from the exact same situation, making comparisons fair and meaningful.
How many shots should I analyze to get a reliable strokes gained picture?
Single-shot strokes gained has high variance due to luck (e.g., a lucky bounce). Meaningful patterns emerge over at least 20–40 rounds of data. Broadie's research suggests you need roughly a full season's worth of data (70–100 rounds) to reliably separate skill from luck in strokes gained statistics.
Is strokes gained used outside of professional golf?
Yes. Amateur golfers, college programs, and even junior development academies use strokes gained with adjusted benchmarks. Apps like Arccos Caddie, Shot Scope, and the Grint all implement strokes gained tracking for recreational players using handicap-adjusted or amateur-specific baseline tables.
What is a good strokes gained value for an amateur golfer?
For amateurs using tour benchmarks, negative total strokes gained values are normal and expected — a scratch handicap player is typically around −0.5 to +0.5 SG:TOT per round versus tour benchmarks. Using amateur-level benchmarks calibrated to your handicap level gives a more meaningful comparison for non-professional golfers.
Last updated: 2025-01-30 · Formula verified against primary sources.