- Win Rate
- 49.6%
- Pick Rate
- 0.7%
- Ban Rate
- 0.6%
Karthus vs Locke
- Patch
- 26.20
- Games
- 1,354
- Lane
- All Lanes
- Tier
- All Tiers
- Last Updated
- Oct 18, 2026 UTC
- Methodology
- Data Methodology
- Author
- Dakota Chinnick
Karthus vs Locke is a very close matchup in LoL patch 26.20. Karthus wins with a 50.0% win rate (+0.0%) over Locke based on 14 games. Karthus wins the early laning phase while Locke scales better into the late game. Below you'll find the best Karthus build, runes, laning stats, and strategies for the Karthus vs Locke 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 Karthus vs Locke?
Karthus wins 44.4% of these games. With this many games the true rate is most likely between 18.9% and 73.3% (95% range).
- Expected
- 53.5% From both champions' overall Mid win rates
- Matchup effect
- −9.0 pts Observed minus expected
- Sample
- 9 games Lane: Mid
- vs patch 26.19
- — Not enough games on both patches
Lane: Mid · Ranked Solo/Duo & Flex · North America server · All ranks · Patch 26.20 · Oct 10 – Oct 18
They also met in another lane (Jungle): 3 games, Karthus won 33.3%.
Key takeaways
- Only 9 Karthus vs Locke games were recorded in the Mid role on patch 26.20 — too few to say who is favored. Treat the numbers below as provisional.
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 Karthus and Locke 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 Karthus'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.
Karthus vs Locke Laning Stats
Only 9 games have a 15-minute snapshot so far — the lane-phase numbers appear from 30.
Whole-game averages
Karthus vs Locke Win Rate by Game Length
Karthus's win rate against Locke 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: Karthus's results against Locke in short and long games are within the margin of error of each other.
Karthus vs Locke 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 Karthus Changes Against Locke
Only 9 games so far — too few to compare what Karthus players do in this matchup with their usual choices (needs 20).
Best Karthus Build vs Locke
Against Locke
Not enough matchup-specific build data: only 0 of 9 Karthus games against Locke carried a complete build, which is too few to recommend an item path from. Use Karthus's standard build instead.
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 Karthus Runes vs Locke
Usual Karthus runes (Mid)
Dark Harvest
50.0% win rate · 38 games
Against Locke
Too few games for a matchup-specific rune page yet — use the usual page.
Plan your Karthus 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
Karthus matchup data for League of Legends patch 26.20. 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.
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.
Karthus vs Locke FAQ - Patch 26.20
Who wins Karthus vs Locke?
Only 9 Karthus vs Locke games were recorded in the Mid role on patch 26.20 — too few to say who is favored. Treat the numbers below as provisional.
What is Karthus's win rate against Locke?
Karthus wins 44.4% of 9 Mid games against Locke on patch 26.20 (95% range 18.9–73.3%). Based on both champions' overall Mid win rates, 53.5% would be expected.
Does Karthus counter Locke?
There are only 9 Karthus vs Locke games in this lane on patch 26.20 — too few to answer reliably yet.
Who wins lane, Karthus or Locke?
There are not enough games with a 15-minute snapshot yet (9) to say who wins lane.
Does Karthus outscale Locke?
There are too few games of each length to tell yet.
When is Locke strongest against Karthus?
On current data there is no stage of the game where Locke is ahead of Karthus beyond the margin of error.
What should Karthus build against Locke?
There are not enough games for a matchup-specific core, so use Karthus's usual Mid core: Stormsurge, Shadowflame, Malignance.
What runes should Karthus use against Locke?
Use Karthus's usual Dark Harvest page (Domination + Sorcery); there are too few games for a matchup-specific page.