How to know how hard to hit a putt
How to judge how hard to hit a putt: how far past to aim by distance, turn uphill and downhill into a plays-like distance, adjust for green speed, build feel.
September 25, 2026 · 7 min read
Hit putts hard enough to finish past the hole: about 3 feet past inside 8 feet, about 17 inches past from 15–25 feet, and just past on long putts. To know how hard that is, turn the putt into a "plays-like" distance first. Add length for uphill and take it off for downhill. Then make the stroke you'd make for that distance on a flat green. On a typical 2% slope, a 10-foot uphill putt plays about 13 feet and a 10-foot downhill putt about 7.
Speed is the half of putting that golfers who struggle with greens tend to ignore, and it's the half that causes three-putts. It also decides how much a putt breaks, so you can't read a putt properly until you've decided how hard you'll hit it.
Why speed comes first
Two reasons:
- Speed decides the break. A soft putt spends longer on the slope and turns more. A firm one turns less. The line you read only works at the pace you read it for.
- Speed decides the second putt. Hit a 30-footer to within 2 feet and you'll almost always two-putt. Leave it 6 feet short or run it 6 feet by and a three-putt is a real chance. Most three-putts start with a bad first-putt speed, not a bad line.
The target: past the hole, by distance
Dave Pelz's research on putting found that the pace that holes the most putts finishes about 17 inches past the hole if it misses. Two reasons:
- The ground right around the hole is trampled and bumpy. Pelz called it the "lumpy donut". A ball that's crawling when it gets there wobbles off line. A little extra pace carries it through.
- Much firmer than that and the hole gets effectively smaller: a fast ball can lip out, or skip over the front edge, where a slower one would drop.
Pelz's number is a good default, but our own simulations of more than 100,000 putts found the best pace depends on length: about 3 feet past from 4–8 feet, about 2 feet from 12 feet, 17 inches from about 20 feet, and within a foot from 30 feet. Dying a short putt at the hole was the costliest pace of all. The details are in is 17 inches past the hole the right speed?. The point is to stop trying to "die it in the hole". A putt that's short never goes in.
Plays-like distance: uphill and downhill
Gravity helps a downhill putt and fights an uphill one, so the stroke you need changes a lot. The useful trick is to convert every putt into the flat distance it plays like.
We worked this out with Plumb Bob's putt physics for a 10-foot putt, aiming to finish 17 inches past:
| Slope along the putt | Stimp 8 | Stimp 10 | Stimp 12 |
|---|---|---|---|
| 3% uphill | 13.5 ft | 14.4 ft | 15.2 ft |
| 2% uphill | 12.3 ft | 12.9 ft | 13.5 ft |
| 1% uphill | 11.2 ft | 11.5 ft | 11.7 ft |
| Flat | 10 ft | 10 ft | 10 ft |
| 1% downhill | 8.8 ft | 8.5 ft | 8.3 ft |
| 2% downhill | 7.7 ft | 7.1 ft | 6.5 ft |
| 3% downhill | 6.5 ft | 5.6 ft | 4.8 ft |
Three things to take from this:
- Slope changes the effective length a lot. A 2% grade, which you can barely see, moves a 10-footer by about 3 feet either way.
- Fast greens exaggerate it. On a quick green, gravity is a bigger share of what slows the ball. A 3% downhill 10-footer at Stimp 12 plays under 5 feet: barely a tap.
- Longer putts move even more. At Stimp 10, a 20-footer on 2% plays about 25½ feet uphill and 14½ feet downhill. A 30-footer plays 38 feet uphill and 22 downhill.
A quick rule you can use on the course: for each 1% of slope, add or take off about 12–15% of the length on a medium-speed green, more on a fast one. Then putt to the new number.
Green speed: calibrate before you play
The same stroke rolls much further on a fast green than a slow one. That's what a Stimp number measures: Stimp 8 means the test ball rolled 8 feet, Stimp 12 means 12. If your home course runs 9 and you visit a club at 11, every putt goes about 20% further for the same stroke.
Before a round:
- Go to the practice green and roll three balls to the fringe from 30 feet. Don't aim at a hole; just try to stop them on the edge.
- Roll three uphill and three downhill 15-footers.
- Notice whether your normal stroke is long or short today, and adjust.
If you want a number, measure the green speed with a stopwatch or one rolled ball. Also remember that green speed changes the break: at Stimp 12 a putt breaks about 50% more than at Stimp 8.
How to build feel for distance
Swing length, not hit strength
Control distance with the length of your stroke, keeping the rhythm the same. Golfers who struggle with speed usually take the same backswing on every putt and "hit" harder or softer. That's hard to repeat. A longer, smooth swing is easy to repeat.
A simple start: back to your right toe (right-handers) for about 10 feet, back to just outside your foot for 20, and further for 30. Your numbers will differ. Find them on the practice green.
Look at the hole, not the ball
On long putts, take your practice strokes while looking at the hole. Your brain is good at matching effort to a distance it can see. That's how you'd throw a ball to someone without thinking.
Ladder drill
Put tees at 10, 20, 30 and 40 feet. Putt one ball to each, in order, then back down. Next, putt to stop each ball just past the previous one without touching the fringe. Ten minutes of this before a round beats an hour of 6-footers for avoiding three-putts.
Commit to a finish spot
Before every putt, pick where the ball should stop if it misses: about a foot and a half past. Then putt to that spot, not to the hole. It stops you leaving putts short.
Speed and break work together
Here's how pace changes the line on a 10-foot putt across a 2% slope at Stimp 10:
| Pace | Aim outside the hole |
|---|---|
| Dies about 6 in past | 13.2 in (3 cups) |
| Finishes 17 in past | 11.0 in (2½ cups) |
| Runs 3 ft past | 8.7 in (2 cups) |
The softer putt needs half as much break again as the firm one. So read the putt for the pace you'll actually hit. If you tend to charge putts, you'll need less break than a golfer who dies them in. And if you keep missing on the low side, your speed may be part of the reason.
Using a green reader to learn speed
Plumb Bob turns each putt into numbers you can learn from: the distance, how long it plays like once uphill or downhill is included, and the aim point at the green's measured speed. Read a putt, guess its plays-like distance, then check. After a few sessions you'll feel that a downhill 12-footer is really an 8-footer before the app says so. Use it for practice and friendly rounds; a device isn't allowed in competition.
FAQ
How hard should you hit a putt?
Hard enough to finish past the hole if it misses: about 3 feet past on putts inside 8 feet, about 17 inches past from 15–25 feet, and just past (within a foot) on long putts.
How do you judge how hard to hit a putt uphill or downhill?
Turn it into a plays-like distance. On a medium-speed green, add or subtract about 12–15% of the length for each 1% of slope. A 10-footer on 2% plays about 13 feet uphill and 7 feet downhill.
How do I stop leaving putts short?
Pick a spot about 18 inches past the hole and putt to that spot instead of the hole. Control distance with stroke length, not a harder hit, and practise lag putts to the fringe.
How far past the hole should a putt go?
It depends on the length. Dave Pelz's research found about 17 inches, and our simulations agree for putts of about 15–25 feet. Shorter putts do better finishing 2–3 feet past, and long lag putts finishing within a foot past.
Does putting speed affect break?
Yes. A slower putt breaks more because it spends longer on the slope. On a 10-footer across a 2% slope, a putt that dies at the hole needs about 13 inches of break, and one that runs 3 feet past needs about 9.