Understanding the speed of the greens is the first step to controlling your putting, and the Stimpmeter is a simple tool designed to give you that precise information. This guide provides a complete, step-by-step tutorial on how to use a Stimpmeter correctly, interpret the numbers, and apply that knowledge to a more confident and consistent putting game.
In simple terms, a Stimpmeter is a 36-inch aluminum bar with a V-shaped groove running down its center and a small notch about 30 inches from the bottom end. It's not a high-tech gadget, it's a wonderfully simple ramp designed to do one thing with remarkable consistency: measure the speed of a putting green. By rolling a ball from the notch down the ramp and onto the green, we can measure how far it travels. This distance, averaged from several rolls, gives us what is known as the "Stimp rating" or "Stimp reading."
A common misconception is that a "fast" Stimp reading is "good" and a "slow" one is "bad." This isn't the case at all. The number is just a measurement. It provides an objective standard so that greens can be compared from one course to another, or even from one day to the next at the same course. For you, the golfer, knowing the Stimp reading is about eliminating guesswork and calibrating your feel for the day.
So, you have a number. What do you do with it? Understanding green speed directly impacts the two most important parts of putting: pace and break.
Ultimately, a Stimpmeter helps you build confidence. You step onto the first green knowing, not guessing, what to expect. That certainty allows you to put a free, committed stroke on the ball, which is what great putting is all about.
The good news is that using a Stimpmeter is straightforward and doesn’t require much equipment. Here’s what you’ll need:
To get a reliable Stimp reading, follow this process carefully. It's designed to account for any subtle, unnoticeable slopes in the green for a truly accurate measurement.
Your first task is to find a portion of the green that is as flat and level as possible. Look for an area roughly 10-15 feet in length that appears to have minimal slope. Using a severely sloped section will give you a reading that doesn't represent the rest of the greens fairly. The practice putting green is the perfect place to do this.
Stand on the area you selected and place a tee in the ground to mark your starting point. Place the Stimpmeter on the green with its tapered end resting on the ground. Hold the other end in your hand. Place one of the golf balls in the notch on the Stimpmeter. Now, slowly and smoothly, begin to lift the end of the Stimpmeter. At a certain angle (around 20 degrees), gravity will take over and the ball will be released, rolling out of the notch and down the ramp onto the green. The a goal is for a gentle, repeatable release. Don't flick it or lift it quickly.
Repeat the process with the other two golf balls from the exact same starting point, trying to roll them down the same line as the first one. Let all three balls come to a complete stop. For a good reading, the three balls should finish within 8-10 inches of each other. If one is wildly different, disregard it and roll another one. Once they’re all settled, place a tee in the grass to mark the average finishing spot of the three balls.
Measure the distance in feet from your starting tee to the tee marking the average stopping point of the three balls. Let's say, for this example, the distance is 10.5 feet. You’re halfway there.
Now, this is the part many people forget, but it’s fundamental to an accurate reading. We need to account for any slight slope. Go to the tee that marks the average stopping point of your first set of rolls. You are now going to roll the three balls back towards your original starting tee. Follow the exact same procedure: place the Stimpmeter on the ground, put a ball in the notch, and slowly lift until it rolls out. Do this for all three balls.
Let the three balls come to rest. Just as before, find the average stopping point of this second set of balls and place your third tee there. Measure the distance from your second starting point (where the first set of balls finished) to the average spot of this second set. Because of a slight downhill slope you might not have noticed, this second set of rolls might travel a little farther. Let's say this distance is 11.5 feet.
The final Stimp reading is simply the average of the two distances you measured. To calculate it, add the two numbers together and divide by two.
Using our example:
(10.5 feet + 11.5 feet) / 2 = 22 feet / 2 = 11
The Stimpmeter reading for this green is 11. It's that simple!
That number gives you a solid reference point. While conditions vary by course maintenance, weather, and time of day, knowing the Stimp reading allows you to classify a green's speed and adjust your play accordingly. Here’s a general guide:
Now that you know how to use a Stimpmeter and understand the results, the final step is to turn that knowledge into better scores. If you have the chance, "Stimp" the practice green before your round. If it reads a 10.5, your entire goal during your warm-up is to find the stroke that "feels" like 10.5. Hit 10-footers, 15-footers, and 30-footers until you consistently get the ball near the hole. You are no longer guessing, you are calibrating your feel to a specific speed.
Throughout your round, keep that feel in mind. As temperatures rise and greens dry out, they might get a little faster. As it gets late in the day with lots of foot traffic, they might slow down. But having that initial baseline from your Stimpmeter reading gives you a powerful point of reference to adjust from. You’ll find yourself leaving fewer putts short, getting more lag putts into that tap-in "hoop," and feeling far more in control on the greens.
Learning how to properly use a Stimpmeter moves you away from guesswork and towards a real understanding of green speed. By taking a few minutes on the practice green, you can get a reliable, objective number that helps you calibrate your putting stroke, better predict break, and build the confidence necessary to hole more putts.
While mastering tools like the Stimpmeter provides a fantastic baseline, applying that knowledge under pressure is another skill entirely. This is where modern tools can help bridge the gap, for instance, you can use a tool like Caddie AI to get instantaneous, personalized putting strategies. It can help you confidently adjust your read for slope, grain, and even the diagnosed green speed, turning your practice-green knowledge into reliable on-course results.
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