Caitlynvs Karthus
Caitlyn vs Karthus is a decisive matchup in LoL patch 26.19. Caitlyn wins with a 53.9% win rate (+7.7%) over Karthus based on 13 games. Caitlyn holds the advantage in both the early and late game. Below you'll find the best Caitlyn build, runes, laning stats, and strategies for the Caitlyn vs Karthus matchup.
Caitlyn Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Caitlyn 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 Caitlyn vs Karthus?
Caitlyn wins 48.1% of these games. With this many games the true rate is most likely between 30.7% and 66.0% (95% range).
- Expected
- 40.7% From both champions' overall Bot win rates
- Matchup effect
- +7.5 pts Observed minus expected
- Sample
- 27 games Lane: Bot
- vs patch 26.18
- — Not enough games on both patches
Lane: Bot · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Karthus, but the sample is too limited for a strong conclusion: Caitlyn wins 48.1% of 27 games (95% range 30.7–66.0%).
- Both champions' overall Bot win rates predict 40.7% for Caitlyn; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Caitlyn players pick Health (defense) far more often against Karthus: 10.2% of their other Bot games, 33.3% here.
How we calculate this
Games: ranked Solo/Duo and Flex games on the North America server from the patch shown. Remakes (games under 5 minutes) are excluded.
A game only counts when Caitlyn and Karthus played the same position on opposite teams, so roaming, lane swaps within a team or a champion merely being in the same game never count as this matchup.
The 95% range is a Wilson score interval. Confidence comes from how wide that range is: within ±3 points is very high, ±5 high, ±8 moderate, anything wider low. Below 20 games a matchup is not classified at all.
Expected win rate combines both champions’ win rates in this lane (same games and filters) with the log5 formula: E = A(1−B) / (A(1−B) + B(1−A)). Matchup effect = observed − expected.
"What changes" compares Caitlyn's choices in this matchup with the same champion's other games in the same lane, and lists a change only when it is at least 3 points and statistically significant (two-proportion z-test, |z| ≥ 2, 20+ games).
Results are not split by rank: the sample per rank is too small for honest per-rank matchup numbers.
Caitlyn vs Karthus Laning Stats
Only 26 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Caitlyn vs Karthus Win Rate by Game Length
Caitlyn's win rate against Karthus by game length. The dot is the win rate, the bar its 95% range and the dashed line the champion's usual win rate at that length. Lengths with fewer than 25 games are left blank.
No game length stands out: Caitlyn's results against Karthus in short and long games are within the margin of error of each other.
Caitlyn vs Karthus Power Spikes
Who is ahead at each stage, measured from these games. A stage reads "Even" when the difference is inside the margin of error, and "Insufficient data" when there are too few games to tell.
- Lane (15 min)Insufficient data
- First itemInsufficient data
- Games under 20 minInsufficient data
- 20–30 min gamesInsufficient data
- 30+ min gamesInsufficient data
What Caitlyn Changes Against Karthus
Choices Caitlyn players make noticeably more or less often in this matchup than in their other Bot games.
Health (defense)Stat shardUsually10.2%vs Karthus33.3%+23.1 pts
InspirationSecondary treeUsually8.8%vs Karthus29.6%+20.8 pts- Health Scaling (defense)Stat shardUsually87.3%vs Karthus66.7%−20.7 pts
Doran's Bow + Health Potion + Health Potion + Stealth WardStarting itemsUsually30.2%vs Karthus48.1%+18.0 pts
SorcerySecondary treeUsually86.7%vs Karthus70.4%−16.3 pts
Gathering StormRuneUsually85.8%vs Karthus70.4%−15.5 pts
Absolute FocusRuneUsually84.5%vs Karthus70.4%−14.1 pts
BloodthirsterItemUsually10.2%vs Karthus22.2%+12.0 pts
Best Caitlyn Build vs Karthus
Usual Caitlyn build (Bot)
90.0% win rate · 10 games
Against Karthus
Not enough matchup-specific build data: only 3 of 20 Caitlyn games against Karthus carried a complete build, which is too few to recommend an item path from. Use Caitlyn's standard build instead.
- Karthus usually completes Blackfire Torch first, at 10.9 min (median of 22 games).
- Skill priority: Q > W > E — the same as usual.
Builds are ranked by the lower edge of their win rate range, not the raw win rate, so a build seen in a handful of wins never outranks a proven one.
Best Caitlyn Runes vs Karthus
Usual Caitlyn runes (Bot)
Lethal Tempo
57.5% win rate · 153 games
Against Karthus
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Caitlyn draft in Draft Lab
Draft Lab lays out both teams lane by lane with live matchup win rates, damage profiles and game-phase lean, and suggests picks and bans from current meta data.
- Full 5v5 draft board
- Lane matchup win rates
- Pick and ban suggestions
Caitlyn matchup data for League of Legends patch 26.19. The table below shows Caitlyn'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 Caitlyn build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Caitlyn Matchups
Hardest for Caitlyn
Easiest for Caitlyn
Win rate and games for each matchup. Lists are ranked by the edge of the 95% range so small samples cannot top them; matchups with at least 50 games only.
Help us maintain accuracy! If you notice incorrect stats, missing data, or any issues, your feedback directly improves the quality of our data for the entire community.
Caitlyn vs Karthus FAQ - Patch 26.19
Who wins Caitlyn vs Karthus?
Current data slightly favors Karthus, but the sample is too limited for a strong conclusion: Caitlyn wins 48.1% of 27 games (95% range 30.7–66.0%).
What is Caitlyn's win rate against Karthus?
Caitlyn wins 48.1% of 27 Bot games against Karthus on patch 26.19 (95% range 30.7–66.0%). Based on both champions' overall Bot win rates, 40.7% would be expected.
Does Caitlyn counter Karthus?
Not clearly. Caitlyn wins 48.1% of 27 games against Karthus, and the 95% range (30.7–66.0%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Caitlyn or Karthus?
There are not enough games with a 15-minute snapshot yet (26) to say who wins lane.
Does Caitlyn outscale Karthus?
There are too few games of each length to tell yet.
When is Karthus strongest against Caitlyn?
On current data there is no stage of the game where Karthus is ahead of Caitlyn beyond the margin of error.
What should Caitlyn build against Karthus?
There are not enough games for a matchup-specific core, so use Caitlyn's usual Bot core: Runaan's Hurricane, Lord Dominik's Regards, Yun Tal Wildarrows. The biggest change against Karthus: Doran's Bow + Health Potion + Health Potion + Stealth Ward (30.2% usually, 48.1% here).
What runes should Caitlyn use against Karthus?
Use Caitlyn's usual Lethal Tempo page (Precision + Inspiration); there are too few games for a matchup-specific page. The biggest change against Karthus: Health (defense) (10.2% usually, 33.3% here).