What is ISO in Baseball? – Guide to Measuring Raw Power

A. Coatess

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A. Coatess



Sean Hunter

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what is iso in baseball

Power plays a big role in the world of sports. It helps denote how the athletes will sweeten and more. And that’s how they do it in the baseball realm.

ISO, also known as Isolated power, is a method of figuring out a hitter’s raw power. The results will go into the record through the player’s extra-base hits.

So, today this guide is here to find out what is iso in baseball. Well then, let’s get started!

Definition of ISO


As a statistic used in the game, ISO or Isolated Power is an initial course for the players – mainly hitters/batters. Although, its process only counts the hits within extra bases. And, of course, there are other types of extra-base hits (which we will dive into a bit later).

So, it is safe to say that ISO focuses mainly on the batters. It is to see how the player’s skill and goods get a spot with a clear sweep, enough to hit for extra bases.

On the other hand, here are some of the uses of ISO you need to know.

The Use of ISO or Isolated Power

ISO stands for Isolated Power, meaning it is already a big catch in the world of baseball based on its name alone. Usually, the use of it is for making picks for the leagues. Yet, its figures are less than 100% equal in effects. It relies on the point arising during play.

For example, there can be instances that two batters can have the same grade of extra base hits per at-bat. But, these can bring out contradicting qualities on on-base rates and contact data.

How to Calculate ISO

In order to have a winning edge, of course, you need to make sure that every data is best. That is why ISO has a sturdy formula used for years now in baseball. Its computation delivers the batter’s skill set during the play.

See the formula below:

ISO = 2B + 2(3B) + 3HR / AB

Legend of the Formula
Symbol Description
ISO Isolated Power. It is the baseball metric used for hitters of the game.
AB At Bats. The denominator of the formula is to get the batting average and slugging data of players.
2B Doubles. The credit a player gets during the game upon hitting the ball to the play and reaching 2nd base without any hassle.
3B Triples. The baseball community labeled it as the “most exciting” part of the baseball game. Just like doubles, this is a credit given to the player – the only difference is that it is for the 3rd base.
HR Home Runs. Well, this is an error-free fair ball hit by the batter and went over the outfield fence.
  • Note: Each factor has a Physical Quantity which is Unitless.

On the other hand, there is another version of the ISO Formula that you can use:

(SLG) Slugging Percentage – AVG Batting Average = ISO

Legend of the Formula
Symbol Description
ISO ISO definition is the baseball metric to get the raw power of hitters during an extra-base game.
SLG Slugging Percentage means the sum of bases a player records per at-bat. This mainly focuses on collecting the hits to insert into the equation.
AVG Batting Average is one of the oldest dated tools to use in baseball for calculating the hitters’ success in the game. It is from dividing the player’s hits by the total number of at-bats. Its range is a number between zero and one.

Although, the first one is the standard one for most pros regarding computation. To understand further, here is an example.

Let us say that if a player went 1-for-5 with a double, that would cause a .200 ISO. Yet there is an instance that the result will be the same (.200 ISO) from the other batter who goes 2-for-5 by a single and double play.

With this, there are the odds that the current player will have a higher batting par than the first batter.

The Importance of ISO


There is no doubt that the use of metrics became very handy in baseball. Unlike other sports, this game has a strict flow, so keeping records like ISO stats is smart. With its structured play, comparing players during a performance in the field will give out data to use for headway and more.

It is why baseball is a concise game; the mark of stats truly comes with impact.

The Performance Parameters used in the ISO Baseball Statistics

The ISO baseball formula must also have parameters to establish such results for the players. This way, we will know which data are promising and require practice. Check out the list below to see the actual tiers of ISO.

ISO Rating
0.25 Excellent level
0.2 Great level
0.17 Above average
0.14 Average level
0.12 Below average
< 0.1 Poor level

Through the following levels to attain, it would be fast for the players and spectators to learn which numbers are improving.

The Limitations of ISO


If you think that ISO is a supreme metric compared with the others, you’re wrong. ISO has limits that you should know.

  • Well, that flaw we are about to reveal is that this metric only bears a momentous ruling if there is an adequate data size – rounding to, at most, 550 plate builds.
  • Also, its results do not include park-or-league-adjusted.
  • This metric also ditches exact weight values like for doubles, triples, and home runs.
  • Moreover, it doesn’t believe to include the standing ringing of the affairs for extra-base hits.

Yet, it is the flaw that makes it more intriguing. Despite its drawbacks, the ISO metric aims to deliver a number linked with a hitter’s raw power. Or, in other words, the pace they hit for extra bases.

Now, that is something! With this, it does have a more functional measure than the slugging percentage. So, point to ISO baseball stat!

Examples of Players with High and Low ISOs

The next stop would be the MLB ISO Leaders of 2023! Find out which players brought their A+ games for the season.

There is no shock that the baseball community is crazy and eager to know who are the best season hitters. Well, seeing those ISO charts would totally release your hype on how the players turned out.

So, enough chit-chat, and let us see the 2023 ISO Highest and Lowest Hitters! Check out below.

 Highest ISO Players of 2023
Aaron Judge of the New York Yankees .459
Chris Garlick of the Minnesota Twins .365
Josh Donaldson of the New York Yankees .356
Mike Ford of the Seattle Mariners .351
Giancarlo Stanton of the New York Yankees .336
 Lowest ISO Players of 2023
Garrett Stubbs of the Philadelphia Phillies .028
Michael Toglia of the Colorado Rockies .029
Vidal Bruján of the Tampa Bay Rays .030
Chris Owings of the Pittsburgh Pirates .030
Tucker Barnhart of the Chicago Cubs .034

Best Strategies for Improving ISO or Isolated Power

The power to hit the ball hard and far is your ticket to becoming a baseball star player. But that does not come in a snap. You must learn how to maintain such force.

It is why you need the following tips to learn. Luckily, we round up the best ones for you to see.

1. Optimal Swing


Like your destiny to play baseball, you must find the swing that suits you best. With your found optimal swing, you can top every ISO chart and other metrics that might check you during the game.

Finding such stuff means you must check what works best for you. You must base your move on size, strength, and body type. With that, you can do great!

2. Strength Training

Of course, strength is the key to having the ultimate raw power as a hitter! It is your core element. With proper training, you can increase your isolated powers and even overcome the average ISO in baseball.

You need to work on your upper and lower body to enhance such strength. Ensure you toughen those muscles like quads, hamstrings, biceps, triceps, etc.

3. Hitting Drills


Hitting drills are your workout #1 to secure an impeccable ISO. Focus on those routines to make your muscles remember the hitting mechanics needed. With enough practice, this will be a massive help for any hitter.

4. Investing in the Best Equipment


Your skills are nothing if you do not work on the best tools. It would just go to waste – and you do not want that, right?

Support your ISO upgrade with the right gear, like cleats, gloves, bats, and helmets. You can ideally and smoothly do swings with them! And those buys will guide your efforts to its win.

5. Be consistent and take good care of yourself!

With consistency and effort, you can boost your isolated power. It is always a combination of proper nutrition, thorough workouts, and confidence. So, better start now!

ISO vs Other Offensive Metrics

Of course, ISO is not the only metric used in this sport. There are other stats used for offense. Discover them all as you read on.

  • Counting Stats and BA/OBP/SLUG Slash Line

These are better known as the “counting stats,” meaning the collected data are from the players while playing in real time. This is all about simplicity. So, if you want to see a more traditional effect in baseball stats, these hitting basics are what you need.

These are the not-so-advanced metrics used for offense during the game. Both methods are straightforward approaches that seek the ability of players to hit and run to their bases.

Unlike other stats, these two are weighted metrics. There are scales and production to consider.

  • X Stats

On the other hand, these are the expected measurements from the play. You can track foreseen battling, slugging, and weighted averages with the following stats.

All in all, these can be pretty helpful in determining the teams and sports performances.


Baseball has been in for years now, and so do its metrics. It is how this sport functions smoothly. It binds the necessary information for future players to utilize.

And that is a neat job to do. That is why knowing things like isolated powers, how it works, and how it can be helpful – are a plus. Its formula elevates such impact along with the other metrics.

Thus, what is ISO in baseball? Well, that is a safeguard you can use to improve the game.

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