Jax vs Karthus Counter Build

How to Beat Karthus as Jax


We summarize our counter stats from the millions of recently ranked LoL games that we analyze each week. This Jax versus Karthus matchup review came out of an analysis of 5,428 ranked games where both champs fought each other.

This champion matchup is relatively rare. Jax has to counter Karthus in only 0.7% of his games. Jax does a decent job of countering Karthus. On average, he wins a acceptable 51.0% of the time the champions oppose each other in. In Jax versus Karthus games, Jax’s team is 5.0% more likely to earn first blood, indicating that he most likely will get first blood against Karthus.

Matchups Analyzed


Win Rate


Team First Blood


Best Jax Items to Counter Karthus

The ideal items to have in your Jax versus Karthus build consist of Black Cleaver, Trinity Force, and Blade of The Ruined King. When Jax included at least these three items in his build, he did significantly better when fighting Karthus than with most other common builds.

Black Cleaver Item Trinity Force Item Blade of The Ruined King Item

Best Jax Runes to Counter Karthus

To have the best chance of vanquishing Karthus as Jax, Jax players should equip the Conqueror, Triumph, Legend: Tenacity, Last Stand, Magical Footwear, and Time Warp Tonic runes. Of all the rune sets we have analyed/that we analyzed for Jax vs Karthus clashes, this combination of runes resulted in the best win rate. We have also displayed the best Karthus runes to counterpick against Jax to help you infer how he will probably be setup against your champion.

Best Jax Runes

Conqueror Rune Conqueror
Triumph Rune Triumph
Legend: Tenacity Rune Legend: Tenacity
Last Stand Rune Last Stand
Magical Footwear Rune Magical Footwear
Time Warp Tonic Rune Time Warp Tonic

Best Karthus Runes

Dark Harvest Rune Dark Harvest
Taste of Blood Rune Taste of Blood
Eyeball Collection Rune Eyeball Collection
Ravenous Hunter Rune Ravenous Hunter
Presence of Mind Rune Presence of Mind
Last Stand Rune Last Stand


The subsequent tables underscore several important Jax versus Karthus matchup statistics that may help us grasp the distinctions between the two. Jax’s KDA ratio ([kills + assists] / deaths) of 1.8 is not as good as Karthus’s KDA ratio of 2.3, showing that Jax may be less central to his team's team fighting potential than Karthus. This observation is in large part a result of the differences in assists.

Battle Stats


Jax Stats
7.2 7.5
Karthus Stats


Jax Stats
6.7 7.3
Karthus Stats


Jax Stats
4.9 9
Karthus Stats

Largest Killing Spree

Jax Stats
3 2.8
Karthus Stats

Damage Dealt

Jax Stats
17081 26356
Karthus Stats

Damage Taken

Jax Stats
28409 23708
Karthus Stats

Objective Stats

Towers Destroyed

Jax Stats
5.5 5.1
Karthus Stats

Inhibitors Destroyed

Jax Stats
1 0.9
Karthus Stats

Dragons Killed

Jax Stats
2.1 1.9
Karthus Stats

Barons Killed

Jax Stats
0.4 0.4
Karthus Stats

Gold Earned

Jax Stats
11441 11519
Karthus Stats

Minions Killed

Jax Stats
105 86
Karthus Stats

Jax usually has a similar longest kill spree as his foe does. Typically, Jax receives more damage than Karthus. This typically indicates differing health capacities, but it can also imply that the champ with increased health has less agility and thus is unable to flee from additional harm when poked or engaged.

In Jax vs Karthus matchups, Jax usually gets a bit more CS than Karthus. Champs that don't finish with very much CS usually don't need much CS to be effective. They are able to scale adequately off their skills and stats alone. However, champs with plenty of CS, such as ADCs, typically have to have a lot of items to be useful. In either situation, work to outperform the averages displayed here to do well.

If you want to view Jax vs Karthus tips and builds for a a specific division, please select one from the selection menu above. At first, the stats and strategies given are computed using every match completed with both champs.

How We Analyze Our Matchups

For this counter guide, we analyzed 5428 Jax vs Karthus matchups from recent LoL games. We use rigorous data cleaning and processing methods to ensure that our counter stats are of the highest quality. You can rest assured that the recommended build to counter Karthus as Jax comes from real data and is not the fabrication of some random LoL player, as some other sites provide. You can use the filters at the top of the page to view the most relevant stats and items to your rank.