Golf’s MOI: Unpacking the Meaning of Moment Of Inertia

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There are many terms in golf that can be confusing for beginners. MOI is one of those terms. MOI stands for Moment of Inertia and is a measure of how much force it takes to twist or rotate an object.

It is an important concept for new golfers to understand because it can help them choose the right clubs for their swing.

In this guide we will cover the basics and answer the question what is MOI in golf as well as go over some of the benefits of having a high MOI as a new golfer.

What Is MOI In Golf & How Does It Work?

In golf, MOI related to your body’s resistance to twisting or rotating. The more mass you have away from the center of gravity, the higher your MOI and the more resistant you are to twisting. This is why heavier clubs tend to be less forgiving than lighter ones – they have a higher MOI.

To add to this, MOI also increases as the distance from the center of gravity increases. So a club with its weight distributed further away from the center will have a higher MOI than one with its weight concentrated near the center.

The importance of MOI becomes clear when you hit a ball off-center. With a high MOI, the club will resist twisting and the face will be more likely to stay square to the target, resulting in a straighter shot. With a low MOI, the club will twist more readily and the face will be less likely to stay square, resulting in a shot that tends to curve off to the side.

So if you’re looking for forgiveness in your clubs, look for ones with a high MOI.

Measuring Moment Of Inertia

In order to make sure all golf clubs are playing by the same rules, the USGA has set a limit on the amount of MOI that any club can have. This limit is 6000 grams per centimeter squared. Any club with an MOI above this limit is considered non-conforming and cannot be used in tournaments.

While most recreational golfers will never need to worry about their clubs exceeding this limit, it’s important to know what MOI is and how it affects your game.

Performance Considerations

When looking for a golf club that will provide you with more forgiveness, it is important to consider the club’s MOI. This is a measure of how resistant the club is to twisting or rotating, and the higher the MOI, the more forgiving the club will be.

Keep in mind that a higher MOI typically also means less distance. So if you are looking for a driver that will give you maximum distance, you may want to consider one with a lower MOI. However, if distance is not your main concern, then a driver with a high MOI may be a better option for you, this is an important consideration for beginner golfers.

Furthermore, most modern drivers have a high MOI, which makes them more forgiving than older drivers while adding in other technological advancements that can also add to their distance.

Which Kind Of MOI Is Better Out Of High and Low MOI?

Higher MOI is better for beginners, as it makes the clubs more forgiving and helps to keep the face of the club square to the target. This results in straighter shots which is something that all golfers, especially beginners, are striving for.

Lower MOI is better for experienced golfers who have a faster swing speed. This is because lower MOI clubs are more responsive to inputs, meaning that they can twist more readily and the face of the club can turn more easily. This gives experienced golfers more control over their shots and allows them to shape their shots more easily.

Additionally, for hitting a fade or draw, a lower MOI club is better as it will twist more readily in response to inputs. This allows experienced golfers to more easily hit the ball with the desired trajectory.

So ultimately, it depends on your level of experience and what you are looking for in a golf club. If you are a beginner, go for a club with a higher MOI. If you are an experienced golfer, go for a club with a lower MOI.

MOI By Golf Clubs

Driver/Wood MOI

A driver with a high MOI will have minimal twisting and a square club face, which is ideal for beginners. This is because a high MOI driver will be more forgiving and will keep the club face square to the target, resulting in straighter shots.

To add to this, modern drivers are being built with the amateur golfer in mind. This means that they have a high MOI, which makes them more forgiving while also adding in other technological advancements such as perimeter weighting that can also add to their distance.

With a larger sweet spot and faster ball speeds, it is easier for beginners to hit the ball a long way with a modern driver.

Irons MOI

Golfers looking for maximum forgiveness in their shots often turn to cavity-back irons. These irons have a higher moment of inertia, or MOI, which means they are less likely to twist or rotate when you hit the ball. This results in straighter shots and is ideal for beginner golfers who are still working on their swing.

Unlike blades, cavity-back irons have a large sweet spot which makes them more forgiving on off-center hits. They are also typically easier to hit than blades, making them a good choice for beginner golfers.

Alternatively, for professional golfers who like to shape the golf ball blades are a better choice as these irons have a lower MOI which makes them more responsive to inputs, meaning that the face of the club can turn more easily. This allows experienced golfers to shape their shots more easily.

Putter MOI

Even putting s a factor when it comes to golf clubs MOI. In fact, many experts believe that the moment of inertia (MOI) plays an even bigger role in putters than in other clubs as so many shots are made with the putter.

Additionally, it is because putters are used for such a short distance, and even the slightest deviation from the intended path can result in a missed shot. For this reason, many manufacturers offer more forgiveness in their putter designs, typically through the use of mallets instead of blades.

While some golfers prefer the feel of a blade putter, most agree that mallets offer more forgiveness and are generally easier to use. If you are new to golf or struggle with making consistent shots, then it is probably best to start out with a mallet-style putter.


Is there a limit for MOI?

6000 grams per centimer squared is the limit set out by the USGA.

Is MOI only found in Drivers?

No, MOI is found in all golf clubs. It is just that drivers usually have the highest MOI out of all the clubs. They have also faced the challenge of adding MOI while still conforming to USGA limits and ensuring that golf clubs can travel a good distance.

What’s the difference of MOI and Center Of Gravity?

Center of gravity focuses more on the spin and launch that a golf club can provide. MOI is more concerned with the resistance of the club to twisting in relation to forgiveness of golf shots.


There is a lot to consider when choosing the right golf club for your game, and one of the most important factors is the Moment of inertia. Club designers are taking this into account more and more as they create new clubs, and it is important for golfers to understand what MOI is and how it can impact their game.

High MOI clubs are more forgiving and ideal for beginner golfers, while low MOI clubs are better suited for experienced golfers who like to shape their shots.

Therefore, consider what it is that you are looking for in a golf club and make sure to take MOI into account when making your decision. It could be the difference between hitting straight shots or struggling to keep the ball on the fairway.