When the green is below you, the ball flies further than the yardage. A simple starting point is to take off about one yard for every yard the green sits below you, so a green 10 yards down plays roughly 10 yards shorter, often about one club less. Treat that as a first guess. Your ball flight, the wind and the firmness of the green will all shift it.
Why the ball goes further
On flat ground, your ball lands at its normal carry distance. When the green is lower, the ball reaches the height where it would normally land and keeps falling. All that extra falling time is also time travelling forward, so it carries further.
This is about the target being lower than you. It's separate from a downhill lie, where the ground under your feet slopes down toward the target. A downhill lie takes loft off the club and makes the ball come out lower with more run, and it's covered properly in the downhill lie post. You can have one without the other, or both together. The elevation versus lie post sorts out the difference.
Does going down need the same adjustment as going up?
Not always, and coaches don't fully agree on this. The yard-for-a-yard rule is a decent first guess in both directions. Some golfers find they need slightly less adjustment going downhill than they need going uphill, because a high ball coming down steeply on a low green doesn't gain as much as you'd think. Others find the opposite once wind gets involved.
The honest answer is to test it. On your home course, note the club you hit on each big downhill hole and where it finished. After a few rounds you'll have a better number than any formula.
Wind matters more
A ball dropping to a low green spends longer in the air. More time in the air means more time for the wind to work on it.
On a downhill par 3 with a crosswind, that matters a lot. A ball that would drift 5 yards on a flat hole can drift noticeably further on a steep downhill one. Into the wind, the extra hang time means the ball can balloon and come up short even after you've clubbed down. Downwind, it can fly the green altogether.
If there's any breeze on a downhill hole, think about the wind first and the drop second. The wind and slope post covers what happens when wind combines with a sloping lie as well.
Where the ball finishes
Downhill approaches often land on greens that are easy to see from above, which feels like an advantage. You can see the whole surface, every bunker and the flag. That's good for picking a target, but it can make you aggressive.
Things to think about before you choose the club:
- What's over the back? Plenty of downhill holes have trouble long. If going long is worse than going short, favour the shorter club.
- How firm is the green? In summer, a ball landing on a low green can release. In winter it'll stop quickly. Adjust the landing spot as well as the club.
- Is the green tilted toward you or away? A green that slopes away from you on a downhill hole will send a ball long. Land it short and let it run on.
The common mistakes
Taking too little club and then swinging hard. You see the green below you, take two clubs less, then realise it looks a long way and swing at it. A big swing with a short club tends to launch higher and spin more, which brings the wind into play. It usually works better to take the club that gets there with your normal, smooth swing.
Forgetting about the lie. If you're standing on a downhill lie and the green is below you, both effects push the ball further. The ball comes out lower, runs more and the green is downhill as well. You may need two clubs less on a steep hole, and a landing spot well short of the flag.
Forgetting the lie works the other way, too. If you're standing on an uphill lie and the green is below you, the two effects partly cancel. The uphill lie adds loft and costs distance, the downhill shot adds distance. In that case, you might end up close to your normal club.
Judging the drop
It's harder than it looks. From the top of a hill, distances can be hard to read, and the drop can look bigger or smaller than it is. A few ways to get a better guess:
- Use a slope rangefinder in casual play to see the "plays like" number, then compare it with what you'd have guessed. Over time your eye improves. In most competitions the slope function has to be switched off, so check local rules.
- Look at the trees or houses near the green and compare their height with the drop.
- Check the course planner. Some give "plays like" yardages on big downhill par 3s.
On a new course, if you're not sure, take one club less than the yardage and swing smoothly. It's a more reliable miss than guessing two clubs less and getting it wrong.
If you'd like to get a real feel for how a downhill lie changes your carry before you meet one on a steep hole, Libro lets you set that lie at home or on the range. It tilts up to 7 degrees along its length and 13 degrees across, sets in seconds with a cam lock, and works with any launch monitor.