The Round Card
Round’s done. Put the card in hole by hole and see which holes cost you, and why. Par and score are enough; putts and penalties tell you more. Nothing you type leaves your browser.
A blow-up hole is one you finish at double bogey or worse: two or more over par. A few of them usually account for a big share of an amateur’s score. Arccos data puts it at about three a round for a 10-handicapper and four for a 15.
The Round Card is a free golf scorecard analyzer. It finds the blow-ups on your card and shows what they cost. If double bogey is your normal hole that day, only triples or worse count, so the list stays short. Add putts and penalties and it tags what went into each one: a penalty, a three-putt, or extra shots to reach the green.
Score only takes about a minute. Putts and penalties show the why.
Stays on this device. It is never sent anywhere.
Pars start as a standard par 72. Tap a par to change it to match your course.
Putts: strokes on the green only; a putt from the fringe counts as a chip. Penalties: 1 for out of bounds, a lost ball, water or an unplayable lie; 2 under the local rule that lets you drop instead of going back for out of bounds. Leave it empty for none.
Typing a score moves you on; a 1 waits in case it is a 10. Enter also moves on.
One round is one round. To see whether a miss keeps coming back, the Tendency Engine tracks fairway and green misses across rounds; your 18-hole rounds saved here show up there too.
No rounds saved yet. Rounds you save stay in this browser, on this device.
Export writes a file to your device; nothing is uploaded. Import takes a Round Card export or a whole Locker backup, and skips rounds already here.
Blow-ups. A blow-up is a double bogey or worse. If double bogey is your typical hole that day (the middle of your scores against par), only triples or worse count, so the list shows the holes that really got away. The result says which rule it used.
What they cost. It adds up the blow-ups against par, sets that against your whole round, and shows what you would have shot had each one been a bogey.
Greens in regulation, without asking. A green is hit in regulation when you are on it with two shots to spare against par. With your putts entered, score minus putts answers it. TheGrint and SwingU work it out the same way. A hole with no putt is left unknown.
Three things a card can price. Penalty strokes, putts beyond two, and shots beyond one to reach a green you missed. Those are the usual routes to a double bogey. The next-round focus goes to whichever cost you most, if it cost at least three strokes (two over nine holes) and nothing else tied it. If it points at the greens, our three-putt guide is where to start; for turning any priority into range time, read the honest practice guide.
How sure it is. A strong signal means the numbers behind a finding were entered on at least 90% of the holes. Some evidence means 60% or more, or a finding that has to guess at the cause. Below 60% a stat is not used at all.
What it will not do. No strokes gained: that needs the distance of every shot. No handicap benchmarks: the published averages disagree too much to judge one round by. And no “tilt” score: TheGrint’s data found golfers play the holes after a blow-up no worse than the holes before it.
Updated 22 September 2026. Engine version 1.
Your score on every hole is the minimum, and it already shows where the round went: which holes, how many blow-ups, which nine. Add putts and penalty strokes and you can see why. Those two, with greens in regulation worked out from them, cover the usual ways a hole turns into a double bogey. Fairways add little for one round.
The ones that explain big numbers. Mark Broadie’s research found the long game explains most of the gap between better and worse amateurs, and that consistent golfers make few blow-ups. Lou Stagner’s analysis of shot data found penalties are the fastest route to a double bogey at every level, with three-putts a growing share as handicaps rise. Putts per round on its own misleads, because hitting more greens means more putts.
Write your score, putts and any penalty strokes on the card as you play, then put the card in here afterwards. It takes a minute or two and needs no phone on the course. The Round Card finds the blow-ups, prices penalties, three-putts and extra shots to the green, and picks one thing for next time only when the card clearly points at it.
From score and putts. Regulation is par minus two strokes to reach the green, so on a par 4 you are on in two. If your score minus your putts is two or less, you hit it. Penalty strokes count as strokes. With no putt recorded, the green is left unknown.
Rounds you save stay in this browser, on this device, including the course name. GolfRaw counts that the tool was used, whether it was a 9- or 18-hole card and whether putts and penalties were entered, never a score, a course, a date or a hole. Export your rounds to a file to keep a copy or move them to another browser.