Karthusvs Jax
Karthus vs Jax is a decisive matchup in LoL patch 26.11. Karthus wins with a 55.6% win rate (+11.1%) over Jax based on 9 games. Karthus wins the early laning phase while Jax scales better into the late game. Below you'll find the best Karthus build, runes, laning stats, and strategies for the Karthus vs Jax matchup.
Karthus Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Karthus performs against them. You'll get head-to-head win rates, laning stats, the best build and runes for the matchup, and early vs late game analysis — all based on real ranked data.
Who Wins the Karthus vs Jax Matchup?
Karthus vs Jax Matchup Summary
The Karthus vs Jax matchup is a decisive matchup in League of Legends ranked play. Based on 9 recent matches analyzed, Karthus wins with a 55.6% win rate compared to Jax's 44.4%, giving Karthus a 11.1 percentage point advantage. Game phase dynamics play a critical role here: Karthus controls the early laning stage, but Jax outscales as the game goes longer. The matchup shifts dramatically depending on game length — Karthus needs to press advantages before Jax reaches their power spikes, while Jax should focus on safe farming and hitting key item breakpoints. The most significant statistical gap is in sustain, where Jax leads by 668 HP/min — a difference that heavily influences the outcome of trades and skirmishes. Karthus players can confidently pick into Jax and play aggressively from level 1. Look to establish lane dominance early through favorable trades and zone Jax away from CS whenever possible. Understanding these matchup dynamics is essential for champion select decisions and in-game strategy when facing this lane opponent.
Karthus vs Jax Laning Phase Breakdown
Jax is favored during the laning phase against Karthus, winning 3 out of 5 key stat categories. Jax holds advantages in gold income, crowd control and sustain, making them the stronger laner in this matchup.
Best Karthus Build Against Jax
Sorcerer's Shoes is the optimal boots choice against Jax, providing the mobility and stats Karthus needs most in this matchup. The top-performing core items for Karthus against Jax are Shadowflame, Zhonya's Hourglass and Malignance. This combination gives Karthus an effective balance of damage, survivability, and utility for the matchup. Adjustments may be needed based on team compositions and game state, but this build provides the strongest foundation for the Karthus vs Jax matchup.
Early Game vs Late Game
Karthus100.0%
Jax0.0%Karthus42.9%Jax57.1%Karthus dominates the early game (first 15 minutes) with a commanding 100.0% win rate — a 100.0 percentage point lead over Jax. This lopsided early game means Karthus can dictate the pace of the lane from level 1, controlling trades, wave state, and river priority.
Jax is far superior in the late game (25+ minutes), boasting a 57.1% win rate — 14.3 points above Karthus. Extended games heavily favor Jax, whose kit and scaling make them a dominant force in team fights and objective control.
This matchup features a dramatic power shift: Karthus must aggressively press their early advantage and close out the game before Jax reaches their scaling breakpoints. If Jax survives the laning phase without falling too far behind, the matchup flips in their favor. Dragon and Rift Herald control are pivotal — the team that secures early objectives can snowball or buy time to scale.
Best Karthus Runes Against Jax
Domination
Precision
Running Domination primary with Precision secondary allows Karthus to press their advantage against Jax, amplifying the strengths that make this a favorable matchup.
Karthus matchup data for League of Legends patch 26.11. The table below shows Karthus's win rate, gold difference, and performance stats against every champion in the current meta. Click any champion name to see a detailed head-to-head breakdown including the best Karthus build, runes, laning stats, and early vs late game analysis for that specific matchup.
Opponent | Win Rate | Matches | CS/min | DMG/min | Gold/game | Early WR | Late WR |
|---|---|---|---|---|---|---|---|
| 49.09% | 55 | 1.4 | 1,030 | 12,957 | 47.8% | 50.0% | |
| 43.64% | 55 | 1.7 | 1,170 | 13,037 | 40.0% | 46.7% | |
| 45.10% | 51 | 1.6 | 1,057 | 13,346 | 31.8% | 55.2% | |
| 59.18% | 49 | 6.3 | 1,291 | 13,609 | 50.0% | 65.5% | |
| 52.08% | 48 | 1.5 | 1,259 | 14,655 | 47.1% | 54.8% | |
| 42.22% | 45 | 1.5 | 1,017 | 13,071 | 43.8% | 41.4% | |
| 37.78% | 45 | 1.3 | 1,027 | 12,768 | 40.9% | 34.8% | |
| 64.44% | 45 | 6.5 | 1,326 | 16,022 | 86.7% | 53.3% | |
| 50.00% | 42 | 6.6 | 1,197 | 13,070 | 66.7% | 33.3% | |
| 43.59% | 39 | 6.3 | 1,215 | 13,238 | 50.0% | 36.8% | |
| 57.89% | 38 | 1.4 | 1,263 | 13,760 | 53.3% | 60.9% | |
| 47.37% | 38 | 1.5 | 1,144 | 13,402 | 37.5% | 54.5% | |
| 34.21% | 38 | 1.9 | 1,067 | 12,867 | 40.0% | 30.4% | |
| 43.24% | 37 | 1.8 | 1,212 | 13,463 | 57.1% | 34.8% | |
| 38.24% | 34 | 7.0 | 1,247 | 13,842 | 33.3% | 42.1% | |
| 46.88% | 32 | 1.8 | 1,146 | 12,845 | 38.5% | 52.6% | |
| 43.33% | 30 | 1.8 | 1,294 | 14,569 | 58.3% | 33.3% | |
| 55.17% | 29 | 6.1 | 1,203 | 12,390 | 66.7% | 42.9% | |
| 46.43% | 28 | 1.4 | 1,030 | 12,474 | 53.3% | 38.5% | |
| 57.14% | 28 | 6.6 | 1,423 | 15,214 | 50.0% | 62.5% | |
| 40.74% | 27 | 1.3 | 1,335 | 15,992 | 16.7% | 47.6% | |
| 28.00% | 25 | 1.8 | 1,163 | 13,295 | 30.0% | 26.7% | |
| 66.67% | 24 | 1.6 | 1,146 | 14,337 | 75.0% | 58.3% | |
| 45.45% | 22 | 1.5 | 1,307 | 14,905 | 50.0% | 44.4% | |
| 66.67% | 21 | 2.2 | 1,201 | 13,572 | 77.8% | 58.3% | |
| 55.00% | 20 | 1.6 | 1,267 | 13,968 | 60.0% | 50.0% | |
| 68.42% | 19 | 5.6 | 1,496 | 16,092 | 100.0% | 60.0% | |
| 63.16% | 19 | 1.3 | 1,116 | 14,409 | 62.5% | 63.6% | |
| 38.89% | 18 | 1.5 | 1,448 | 14,535 | 42.9% | 36.4% | |
| 55.56% | 18 | 6.4 | 1,276 | 13,454 | 66.7% | 44.4% | |
| 72.22% | 18 | 5.1 | 1,121 | 11,322 | 60.0% | 87.5% | |
| 35.29% | 17 | 1.5 | 1,056 | 12,455 | 36.4% | 33.3% | |
| 52.94% | 17 | 1.3 | 1,370 | 15,161 | 57.1% | 50.0% | |
| 76.47% | 17 | 6.5 | 1,263 | 15,482 | 80.0% | 75.0% | |
| 47.06% | 17 | 1.5 | 960 | 12,244 | 44.4% | 50.0% | |
| 52.94% | 17 | 6.5 | 1,330 | 13,719 | 66.7% | 45.5% | |
| 43.75% | 16 | 1.4 | 1,244 | 15,497 | 50.0% | 41.7% | |
| 56.25% | 16 | 1.3 | 1,080 | 13,221 | 80.0% | 45.5% | |
| 53.33% | 15 | 5.4 | 1,373 | 13,678 | 75.0% | 45.5% | |
| 35.71% | 14 | 1.6 | 1,239 | 13,567 | 44.4% | 20.0% | |
| 28.57% | 14 | 6.7 | 1,359 | 11,934 | 50.0% | 12.5% | |
| 42.86% | 14 | 2.4 | 1,250 | 14,777 | 40.0% | 44.4% | |
| 50.00% | 14 | 1.6 | 1,082 | 15,541 | 25.0% | 60.0% | |
| 69.23% | 13 | 6.5 | 1,305 | 13,965 | 57.1% | 83.3% | |
| 61.54% | 13 | 6.5 | 1,256 | 12,939 | 60.0% | 62.5% | |
| 53.85% | 13 | 2.5 | 1,052 | 12,276 | 75.0% | 44.4% | |
| 58.33% | 12 | 5.9 | 1,027 | 10,269 | 57.1% | 60.0% | |
| 83.33% | 12 | 1.3 | 1,229 | 13,183 | 80.0% | 85.7% | |
| 50.00% | 12 | 5.4 | 1,340 | 14,967 | 75.0% | 37.5% | |
| 45.45% | 11 | 1.4 | 1,031 | 13,145 | 57.1% | 25.0% | |
| 72.73% | 11 | 1.6 | 1,027 | 12,997 | 100.0% | 57.1% | |
| 27.27% | 11 | 5.9 | 1,132 | 13,232 | 0.0% | 42.9% | |
| 30.00% | 10 | 3.2 | 1,059 | 13,472 | 25.0% | 33.3% | |
| 70.00% | 10 | 7.4 | 1,271 | 15,568 | 100.0% | 57.1% | |
| 70.00% | 10 | 2.9 | 1,144 | 15,271 | 100.0% | 62.5% | |
| 50.00% | 10 | 7.2 | 1,138 | 12,216 | 50.0% | 50.0% | |
| 40.00% | 10 | 2.9 | 1,376 | 15,578 | 0.0% | 44.4% | |
| 55.56% | 9 | 5.5 | 1,266 | 13,151 | 50.0% | 60.0% | |
| 33.33% | 9 | 4.9 | 927 | 10,925 | 20.0% | 50.0% | |
| 44.44% | 9 | 6.2 | 1,072 | 10,467 | 33.3% | 66.7% | |
| 55.56% | 9 | 3.3 | 1,212 | 14,875 | 100.0% | 42.9% | |
| 55.56% | 9 | 1.4 | 1,252 | 15,076 | 100.0% | 42.9% | |
| 77.78% | 9 | 2.9 | 1,165 | 14,153 | 66.7% | 83.3% | |
| 33.33% | 9 | 2.1 | 1,195 | 13,834 | 33.3% | 33.3% | |
| 87.50% | 8 | 1.3 | 1,113 | 14,337 | 80.0% | 100.0% | |
| 25.00% | 8 | 1.3 | 1,285 | 13,222 | 50.0% | 16.7% | |
| 87.50% | 8 | 6.4 | 1,182 | 14,464 | 50.0% | 100.0% | |
| 75.00% | 8 | 1.7 | 1,650 | 16,965 | 50.0% | 83.3% | |
| 75.00% | 8 | 6.7 | 1,197 | 15,023 | 75.0% | 75.0% | |
| 62.50% | 8 | 2.0 | 991 | 13,519 | 100.0% | 50.0% | |
| 37.50% | 8 | 1.7 | 996 | 13,524 | 0.0% | 50.0% | |
| 57.14% | 7 | 6.3 | 1,632 | 17,174 | 100.0% | 50.0% | |
| 42.86% | 7 | 2.9 | 1,108 | 11,950 | 25.0% | 66.7% | |
| 14.29% | 7 | 1.1 | 907 | 12,626 | 25.0% | 0.0% | |
| 71.43% | 7 | 6.9 | 1,202 | 14,284 | 50.0% | 80.0% | |
| 85.71% | 7 | 5.5 | 1,332 | 17,108 | 0.0% | 85.7% | |
| 42.86% | 7 | 4.1 | 1,210 | 13,964 | 0.0% | 50.0% | |
| 28.57% | 7 | 6.0 | 1,442 | 13,367 | 0.0% | 40.0% | |
| 57.14% | 7 | 7.0 | 1,427 | 13,690 | 33.3% | 75.0% | |
| 57.14% | 7 | 2.4 | 1,124 | 12,107 | 40.0% | 100.0% | |
| 85.71% | 7 | 1.0 | 1,062 | 14,104 | 50.0% | 100.0% | |
| 50.00% | 6 | 7.1 | 1,388 | 12,743 | 50.0% | 50.0% | |
| 33.33% | 6 | 6.8 | 1,144 | 11,486 | 0.0% | 66.7% | |
| 66.67% | 6 | 4.2 | 1,440 | 15,135 | 100.0% | 60.0% | |
| 33.33% | 6 | 2.3 | 965 | 9,779 | 0.0% | 50.0% | |
| 33.33% | 6 | 2.5 | 1,074 | 12,120 | 50.0% | 0.0% | |
| 33.33% | 6 | 6.6 | 1,316 | 11,448 | 0.0% | 66.7% | |
| 16.67% | 6 | 5.8 | 1,303 | 13,270 | 0.0% | 25.0% | |
| 50.00% | 6 | 2.5 | 1,437 | 16,735 | 0.0% | 75.0% | |
| 20.00% | 5 | 6.3 | 1,409 | 13,939 | 0.0% | 33.3% | |
| 40.00% | 5 | 5.3 | 798 | 6,518 | 0.0% | 100.0% | |
| 40.00% | 5 | 1.1 | 1,418 | 14,804 | 0.0% | 50.0% | |
| 40.00% | 5 | 3.4 | 1,190 | 15,035 | 0.0% | 50.0% | |
| 60.00% | 5 | 4.6 | 1,656 | 13,732 | 66.7% | 50.0% | |
| 80.00% | 5 | 6.7 | 1,331 | 10,470 | 66.7% | 100.0% | |
| 60.00% | 5 | 2.0 | 1,292 | 14,405 | 100.0% | 50.0% | |
| 20.00% | 5 | 6.0 | 1,206 | 10,846 | 33.3% | 0.0% | |
| 40.00% | 5 | 6.7 | 1,012 | 12,710 | 0.0% | 50.0% | |
| 40.00% | 5 | 6.3 | 1,482 | 13,690 | 100.0% | 25.0% | |
| 60.00% | 5 | 5.9 | 1,400 | 13,383 | 66.7% | 50.0% | |
| 40.00% | 5 | 6.5 | 1,189 | 9,677 | 25.0% | 100.0% | |
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Karthus vs Jax - Frequently Asked Questions
How does Karthus do against Jax in League of Legends?
Karthus wins the Karthus vs Jax matchup with a 55.6% win rate compared to Jax's 44.4%, a 11.1 percentage point difference. This data is based on 9 recent ranked games in patch 26.11.
How does Karthus do against Jax in the early game?
In the early game, Karthus has the advantage against Jax with a 100.0% win rate versus 0.0%. Karthus players should look to press their lane advantage through aggressive trades and wave control during the first 15 minutes.
How does Karthus do against Jax in the late game?
In the late game, Jax takes over the Karthus vs Jax matchup with a 57.1% win rate compared to 42.9%. Jax scales better into team fights and objective contests after 25 minutes.
Who wins the Karthus vs Jax matchup?
Karthus wins the matchup against Jax with a 55.6% win rate in League of Legends patch 26.11. The 11.1 percentage point advantage means Karthus is significantly favored in this lane matchup based on 9 games analyzed.
What is the best Karthus build against Jax?
The best Karthus build against Jax includes Shadowflame, Zhonya's Hourglass, Malignance with Sorcerer's Shoes. Check the matchup breakdown above for the full item path and build order.
What are the best Karthus runes against Jax?
The best Karthus runes against Jax use the Domination primary tree with Precision secondary. This rune setup achieves a 100.0% win rate in the Karthus vs Jax matchup. See the full rune breakdown in the matchup comparison above.
Does Karthus counter Jax?
Yes, Karthus has a favorable matchup against Jax with a 55.6% win rate. Karthus strongly counters Jax in lane based on current patch 26.11 data.
How do I play Karthus against Jax?
When playing Karthus against Jax, leverage your statistical advantages by trading aggressively during favorable windows. You have early game priority — look for kills and zone control before first recall. Build the recommended items and runes for this specific matchup for the best results.