Rammusvs Karthus
Rammus vs Karthus is a very close matchup in LoL patch 26.19. Rammus wins with a 50.0% win rate (+0.0%) over Karthus based on 12 games. Karthus wins the early laning phase while Rammus scales better into the late game. Below you'll find the best Rammus build, runes, laning stats, and strategies for the Rammus vs Karthus matchup.
Rammus Matchup Breakdown
Use the dropdown to select an opponent and see a detailed breakdown of how Rammus 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 Rammus vs Karthus?
Rammus wins 61.5% of these games. With this many games the true rate is most likely between 42.5% and 77.6% (95% range).
- Expected
- 55.1% From both champions' overall Jungle win rates
- Matchup effect
- +6.4 pts Observed minus expected
- Sample
- 26 games Lane: Jungle
- vs patch 26.18
- — Not enough games on both patches
Lane: Jungle · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.19 · Sep 24 – Sep 28
Key takeaways
- Current data slightly favors Rammus, but the sample is too limited for a strong conclusion: Rammus wins 61.5% of 26 games (95% range 42.5–77.6%).
- Both champions' overall Jungle win rates predict 55.1% for Rammus; the result is within the margin of error of that, so this matchup mostly reflects the two champions' general strength.
- Rammus players pick Plated Steelcaps much less often against Karthus: 61.8% of their other Jungle games, 30.8% 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 Rammus 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 Rammus'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.
Rammus vs Karthus Laning Stats
Only 26 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Rammus vs Karthus Win Rate by Game Length
Rammus'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: Rammus's results against Karthus in short and long games are within the margin of error of each other.
Rammus 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 Rammus Changes Against Karthus
Choices Rammus players make noticeably more or less often in this matchup than in their other Jungle games.
Plated SteelcapsBootsUsually61.8%vs Karthus30.8%−31.0 pts
Hollow RadianceItemUsually23.0%vs Karthus50.0%+27.0 pts
ThornmailItemUsually90.5%vs Karthus65.4%−25.1 pts- Q > E > Wthe Q > E > W skill orderSkill priorityUsually58.0%vs Karthus34.6%−23.4 pts
Sunfire AegisItemUsually49.4%vs Karthus26.9%−22.5 pts
Mercury's TreadsBootsUsually26.7%vs Karthus46.2%+19.4 pts
Sorcerer's ShoesBootsUsually1.2%vs Karthus11.5%+10.4 pts
Dark HarvestKeystoneUsuallyunder 0.5%vs Karthus3.8%+3.8 pts
Best Rammus Build vs Karthus
Usual Rammus build (Jungle)
68.7% win rate · 83 games
Against Karthus
Not enough matchup-specific build data: only 1 of 14 Rammus games against Karthus carried a complete build, which is too few to recommend an item path from. Use Rammus's standard build instead.
- Skill priority: Q > E > W — 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 Rammus Runes vs Karthus
Usual Rammus runes (Jungle)
Aftershock
53.7% win rate · 1,295 games
Against Karthus
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Rammus 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
Rammus matchup data for League of Legends patch 26.19. The table below shows Rammus'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 Rammus build, runes, laning stats, and early vs late game analysis for that specific matchup.
Other Rammus Matchups
Hardest for Rammus
Easiest for Rammus
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.
Rammus vs Karthus FAQ - Patch 26.19
Who wins Rammus vs Karthus?
Current data slightly favors Rammus, but the sample is too limited for a strong conclusion: Rammus wins 61.5% of 26 games (95% range 42.5–77.6%).
What is Rammus's win rate against Karthus?
Rammus wins 61.5% of 26 Jungle games against Karthus on patch 26.19 (95% range 42.5–77.6%). Based on both champions' overall Jungle win rates, 55.1% would be expected.
Does Rammus counter Karthus?
Not clearly. Rammus wins 61.5% of 26 games against Karthus, and the 95% range (42.5–77.6%) includes 50%, so neither champion reliably counters the other on current data.
Who wins lane, Rammus or Karthus?
There are not enough games with a 15-minute snapshot yet (26) to say who wins lane.
Does Rammus outscale Karthus?
There are too few games of each length to tell yet.
When is Karthus strongest against Rammus?
On current data there is no stage of the game where Karthus is ahead of Rammus beyond the margin of error.
What should Rammus build against Karthus?
There are not enough games for a matchup-specific core, so use Rammus's usual Jungle core: Jak'Sho, The Protean, Randuin's Omen, Thornmail. The biggest change against Karthus: Plated Steelcaps (61.8% usually, 30.8% here).
What runes should Rammus use against Karthus?
Use Rammus's usual Aftershock page (Resolve + Precision); there are too few games for a matchup-specific page. The biggest change against Karthus: Dark Harvest (under 0.5% usually, 3.8% here).