Jax benefits greatly from items that have both Ability Power and Attack Damage such as Guinsoo's Rageblade and Hextech Gunblade.
Jax can Leap Strike to friendly units, including wards. You can use them to plan your escape.
Body Slam is on a very low cooldown, making it difficult to pursue Gragas. Don't overextend yourself chasing him.
Gragas can knock everybody away with his ultimate. Be careful that you don't get knocked into him or, worse, an enemy tower.
The stats provided here show several influential Jax against Gragas matchup stats that can help us explain the distinctions between the two. As an example, Jax’s KDA ratio ([kills + assists] / deaths) of NaN is greater than Gragas’s ratio of NaN, indicating that Jax may be more central to his team's team fighting capability than Gragas..
Jax often has a similar longest killing spree as his opponent does. Typically, he receives a similar amount of damage to Gragas. This typically indicates different amounts of tankyness; however, it can also illustrate that the champion with more health has less agility and thus is unable to kite away from further damage when engaged or poked.
Both League champions are great. Both have their pros and cons. In the game's current meta, Jax usually fairs equally well when facing off against Gragas, with a 50.9% win rate. As a result, Jax makes an ok counter for Gragas.
While Jax does have a higher win rate compared to Gragas, when facing one another, Jax also has a greater learning curve that makes him a more time consuming character to pick up and master. You still need to be cautious when picking Jax into Gragas.
Moreover, Jax also has some amount of utility and CC, a similar amount to Gragas. This often makes her just as valuable during teamfights, especially when facing champions with a ton of burst damage.
While there is not one best champion in League of Legends, in Jax vs Gragas matchups, Jax is the better champ with a similar win rate, similar champion depth, and a similar amount of utility to help out your teammates during teamfights.
Jax is a decent counter to Gragas. Focus your play on maximizing your gold and cs and destroying objectives. If you can do that, you should do very well as Jax against Gragas.
If you would like to learn all of the intricacies of Jax in order to counter Gragas during both the early game and mid / late game phases of League of Legends, you should continue reading to learn a few extra tricks and insights into this matchup. If you pay attention to the build and tips displayed above, you will grow your win rate significantly and be that much closer to League of Legends pro players.
Jax often gets a similar amount of CS compared to Gragas. Champions who typically don't acquire many minion kills typically don't need much CS to be effective, such as sup champs. They are capable of scaling well off of their skills, stats, and first items alone. Yet, champions with a lot of CS, such as hyper-carries, usually require a lot of items to be effective. In either case, try to exceed the numbers displayed on this page to do well.
The best items to prioritize in your Jax versus Gragas build consist of Trinity Force, Wit's End, and Spear of Shojin. When Jax used at least these three pieces in his build, he did much better when fighting Gragas than with most other common counter builds. In fact, Jax had an average win rate of 50.9% when countering Gragas with this counter build.
To have the highest likelihood of annihilating Gragas as Jax, you should use the Lethal Tempo, Triumph, Legend: Alacrity, Last Stand, Magical Footwear, and Cosmic Insight runes from the Precision and Inspiration rune sets. Out of all the rune combinations players used for Jax vs Gragas battles, this mix of runes resulted in the highest win rate. Moreover, these runes provided a 50.9% winrate overall.
If you would like to see Jax vs Gragas tips and matchup stats and build suggestions for a a particular division rank, please choose one from the selection menu provided above. By default, the stats and build suggestions given are computed using every game played with these champs.