Your bag is gapped on numbers a fitter read off a launch monitor once, on a good day, indoors. This logs what you actually hit on the range — five to ten balls a club — and gives you the median carry, how far the bad ones stray, and the two clubs quietly doing the same job. Runs entirely in your browser. Nothing uploaded, nothing sold to you.
Hit five to ten balls with each club, write down every carry, and take the median rather than the average — one thinned shot ruins an average. Aim for 10–15 yards between clubs. Over 25 yards is a hole in your bag; under 8 yards means two clubs are doing one job.
Step 1 — pick the club
Step 2 — tap the carry, then log it
Every shot saves to this device as you tap. Close the tab and come back — the session will still be here.
| Club | Shots | Median | Spread | 80% band | Gap |
|---|
The 80% band is where 80% of your shots with that club finished — the tenth to the ninetieth percentile of what you actually hit. It is a description of your dispersion, not a confidence interval around the median, and it gets meaningful at about eight shots. Below five the number is guesswork and this tool says so rather than pretending.
An average is the wrong tool for range balls. Hit nine 7-irons at 160 and one thinned low-runner that carries 105, and the average says 154.5 — a club you do not own. The median says 160, which is the shot you will hit on the course. Every distance on this page is a median for that reason.
Spread is the standard deviation of your carries: roughly how far a typical shot strays from the middle. A tight iron sits near 4–6 yards. Anything past 12 is either a club you cannot control or a bucket of range balls that vary more than your swing does — and on a scuffed range ball it is usually both, which is why the absolute numbers matter less than the gaps between them.
Gaps are measured median to median. Under 8 yards, two clubs are doing one job and one of them is spending a slot for nothing. Over 25 yards, there is a distance you simply cannot cover, and you will find it on a par three at the worst possible moment.
Range balls fly shorter than premium balls — commonly 5–10% shorter on full swings. That offset applies to every club roughly equally, so your gaps stay honest even when the absolute yardages read low. Gap on the shape of the ladder, not the height of it.
Five is the working minimum, eight to ten is where it settles. Below five, one fat strike drags the median far enough to make the chart wrong — worse than no chart at all. This tool marks any club with fewer than five shots as unreliable rather than quietly scoring it.
Median, every time. One thinned iron pulls an average down several yards and invents a gap that is not there. The median ignores the outlier and describes the shot you actually hit.
Ten to fifteen yards between irons. Past 25 yards you have a distance with no club for it; under 8 yards two clubs overlap and one is redundant.
No. Every shot is stored in your own browser and never leaves the device — no account, no upload, no third party. Clearing your browser data deletes it, so export a backup from the locker if you want to keep it.
Your chart is ready now. Print it or save it as a PDF straight from your browser — it will not be emailed to you and nothing is uploaded to build it.
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