Best Karthus ADC Counters

Compare Karthus ADC counters, champions Karthus ADC is good against, matchup win rate, expected win rate, delta, sample size, enemy role, and low or high Elo rank scope for draft planning.

Updated 2026-09-20. Data is current for LoL patch 26.18 (all regions, low elo and high elo).

How these matchup statistics are calculated

Counter and synergy statistics use Ranked Solo/Duo games, exclude matches shorter than 600 seconds, and group results by patch window, region, rank scope, and champion role.

Pairwise pages use a rolling three-patch window and compare observed win rate with a log-odds expected win rate based on each champion's role-adjusted baseline; listed pairs require at least 500 games.

Read the full methodology for the model and guidance on interpreting these results.

Summary

High Elo data lists Jhin ADC as the strongest counters for Karthus ADC. Karthus ADC is listed as favorable into Jinx ADC and Kai'Sa ADC. The detailed info below lists each matchup with observed win rate, expected win rate delta, sample size, rank scope, and patch window.

Detailed info:

Top 1 High Elo Karthus ADC same-role counters

  1. Jhin ADC - High Elo data: Karthus ADC vs Jhin ADC, 53.8% observed win rate, -1.3 percentage points vs expected, 647 games, 3-patch window 26.16-26.18.

Top 2 High Elo champions Karthus ADC is good against

  1. Jinx ADC - High Elo data: Karthus ADC vs Jinx ADC, 56.2% observed win rate, +3.9 percentage points vs expected, 555 games, 3-patch window 26.16-26.18.
  2. Kai'Sa ADC - High Elo data: Karthus ADC vs Kai'Sa ADC, 54.8% observed win rate, +0.1 percentage points vs expected, 743 games, 3-patch window 26.16-26.18.

Top 2 High Elo Karthus ADC all-role counters

  1. Lee Sin Jungle - High Elo data: Karthus ADC vs Lee Sin Jungle, 49.0% observed win rate, -5.6 percentage points vs expected, 526 games, 3-patch window 26.16-26.18.
  2. Jhin ADC - High Elo data: Karthus ADC vs Jhin ADC, 53.8% observed win rate, -1.3 percentage points vs expected, 647 games, 3-patch window 26.16-26.18.

Top 3 High Elo all-role champions Karthus ADC is good against

  1. Jinx ADC - High Elo data: Karthus ADC vs Jinx ADC, 56.2% observed win rate, +3.9 percentage points vs expected, 555 games, 3-patch window 26.16-26.18.
  2. Thresh Support - High Elo data: Karthus ADC vs Thresh Support, 53.1% observed win rate, +0.8 percentage points vs expected, 590 games, 3-patch window 26.16-26.18.
  3. Kai'Sa ADC - High Elo data: Karthus ADC vs Kai'Sa ADC, 54.8% observed win rate, +0.1 percentage points vs expected, 743 games, 3-patch window 26.16-26.18.