Karthus - League of Legends Champion
Win Rate
49.3%
Pick Rate
1.3%

Karthusvs Udyr

DMage
Patch26.7
Matches949,984
LaneAll Lanes
TierAll Tiers
Last UpdatedApr 22, 2026
MethodologyData Methodology

Karthus vs Udyr is a decisive matchup in LoL patch 26.7. Udyr wins with a 57.1% win rate (+14.3%) over Karthus based on 7 games. Karthus wins the early laning phase while Udyr scales better into the late game. Below you'll find the best Karthus build, runes, laning stats, and strategies for the Karthus vs Udyr 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.

Compare against an opponent
Udyr - 42.9% win rateUdyr(42.9%)
Karthus - 42.9% win rate in this matchup
Karthus
42.9% WR
VS
Udyr vs Karthus matchup - 57.1% win rate
Udyr
57.1% WR

Who Wins the Karthus vs Udyr Matchup?

Udyr wins the Karthus vs Udyr matchup
Winner
Udyr
Matches: 7
42.9%
Win Rate
57.1%
2.1
CS / min
1.5
1,193
DMG / min
678
15,035
Gold / game
13,130
302
Heal / min
408
447
DMG Mitigated / min
1,146
0.7
CC / min
0.9
50.0%
Early Game WR
50.0%
40.0%
Late Game WR
60.0%

Karthus vs Udyr Matchup Summary

The Karthus vs Udyr matchup is a decisive matchup in League of Legends ranked play. Based on 7 recent matches analyzed, Udyr wins with a 57.1% win rate compared to Karthus's 42.9%, giving Udyr a 14.3 percentage point advantage. Game phase dynamics play a critical role here: Karthus controls the early laning stage, but Udyr outscales as the game goes longer. The matchup shifts dramatically depending on game length — Karthus needs to press advantages before Udyr reaches their power spikes, while Udyr should focus on safe farming and hitting key item breakpoints. The most significant statistical gap is in sustain, where Udyr leads by 804 HP/min — a difference that heavily influences the outcome of trades and skirmishes. Udyr has a strong advantage in this matchup. Karthus players should play defensively, prioritize safe farming under tower, and look for opportunities created by jungle pressure or Udyr overextending. Avoid prolonged trades and wait for team fights where positioning and coordination matter more. Understanding these matchup dynamics is essential for champion select decisions and in-game strategy when facing this lane opponent.

Karthus vs Udyr Laning Phase Breakdown

Karthus wins the laning phase against Udyr in League of Legends

Karthus is favored during the laning phase against Udyr, winning 3 out of 5 key stat categories. Karthus holds advantages in farming, damage and gold income, making them the stronger laner in this matchup.

Farming
2.1Karthus
1.5Udyr
Karthus edges out Udyr by 0.6 CS per minute — a moderate farming advantage that adds up to roughly 9 CS over a 15-minute laning phase. This translates to earlier component purchases and slightly faster power spikes for Karthus.
Damage
1,193Karthus
678Udyr
Karthus heavily out-damages Udyr by 515 DMG/min, dominating both short trades and all-in fights. Udyr should avoid extended combat and instead focus on burst trade patterns — short engages followed by immediate disengagement — to avoid letting Karthus's sustained damage advantage take over.
Economy
15,035Karthus
13,130Udyr
Karthus generates a commanding 1,905 more gold per game than Udyr. This substantial economic advantage means Karthus consistently reaches key item breakpoints earlier, creating a compounding lead that grows throughout the game. Udyr should focus on cost-effective item choices and avoid unnecessary deaths to prevent falling further behind.
Utility
0.7Karthus
0.9Udyr
Both Karthus and Udyr provide similar amounts of crowd control (0.2s/min difference), meaning neither has a significant advantage in locking down opponents for ganks or team fights. Lane ganks are equally effective for both sides.
Sustain
749Karthus
1,554Udyr
Udyr vastly out-sustains Karthus, healing and mitigating 804 more damage per minute. This massive durability gap means Udyr can absorb significant punishment and remain in lane while Karthus is forced to recall. Building grievous wounds early is essential for Karthus, and focusing on burst trade patterns rather than sustained fights is critical.

Best Karthus Build Against Udyr

Sorcerer's Shoes is the optimal boots choice against Udyr, providing the mobility and stats Karthus needs most in this matchup. The top-performing core items for Karthus against Udyr are Shadowflame, Void Staff and Rabadon's Deathcap. This combination gives Karthus an effective balance of damage, survivability, and utility for the matchup. This build achieves a solid 50.0% win rate across 4 games, proving it to be a reliable item path when facing Udyr. Adjustments may be needed based on team compositions and game state, but this build provides the strongest foundation for the Karthus vs Udyr matchup.

Early Game vs Late Game

Early Game
Karthus
50.0%
+0.0% advantage
Karthus early game win rateKarthus50.0%
Udyr early game win rateUdyr50.0%
Late Game
Udyr
60.0%
+20.0% advantage
Karthus late game win rateKarthus40.0%
Udyr late game win rateUdyr60.0%

The early game (first 15 minutes) is a toss-up between Karthus and Udyr, with Karthus holding a razor-thin 50.0% win rate edge (+0.0%). Individual skill and jungle proximity will matter more than champion advantage in the early laning phase.

Udyr is far superior in the late game (25+ minutes), boasting a 60.0% win rate — 20.0 points above Karthus. Extended games heavily favor Udyr, whose kit and scaling make them a dominant force in team fights and objective control.

The power dynamics shift as the game progresses — Karthus has the edge early, but Udyr gradually takes over. However, the margins are slim enough that either champion can win at any stage with the right plays. Focus on taking advantages when you have them rather than waiting for a specific game phase.

Best Karthus Runes Against Udyr

Domination rune tree - Karthus primary runes vs UdyrDomination
Dark Harvest - best Karthus rune vs UdyrCheap Shot - best Karthus rune vs UdyrSixth Sense - best Karthus rune vs UdyrTreasure Hunter - best Karthus rune vs Udyr
Precision rune tree - Karthus secondary runes vs UdyrPrecision
Triumph - best Karthus rune vs UdyrLast Stand - best Karthus rune vs Udyr
100.0% WR

The Domination and Precision rune setup gives Karthus the best tools to compete against Udyr in this difficult matchup, compensating for the statistical disadvantages with optimal rune synergies.


Karthus matchup data for League of Legends patch 26.7. 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.

Karthus matchup win rates and stats in League of Legends patch 26.7
Opponent
Win Rate
Matches
CS/min
DMG/min
Gold/game
Early WR
Late WR
48.78%411.51,24613,63464.7%37.5%
45.00%401.71,19914,67650.0%41.7%
37.84%371.81,20313,45342.9%34.8%
59.46%376.81,20414,13361.1%57.9%
58.33%361.41,18514,86346.1%65.2%
42.86%351.61,14713,92340.0%45.0%
44.12%341.41,12214,48658.3%36.4%
65.63%326.31,26613,64771.4%61.1%
50.00%281.61,25415,99971.4%42.9%
44.44%276.11,21913,94641.7%46.7%
59.26%276.01,24814,69160.0%58.8%
60.00%251.51,20814,13545.5%71.4%
63.64%222.01,41215,52085.7%53.3%
63.64%226.01,33115,66162.5%64.3%
57.89%191.21,11113,72737.5%72.7%
36.84%196.51,28014,54516.7%46.1%
42.11%191.51,29515,86340.0%42.9%
57.89%191.41,15014,33071.4%50.0%
47.06%176.41,29415,52850.0%46.1%
76.47%171.21,06613,39466.7%87.5%
47.06%171.81,19814,51350.0%46.1%
75.00%161.41,29814,71466.7%80.0%
56.25%161.51,14013,02250.0%62.5%
26.67%151.31,03412,14627.3%25.0%
33.33%152.11,14213,21320.0%40.0%
35.71%141.11,12013,85225.0%50.0%
38.46%131.21,08313,38916.7%57.1%
38.46%131.41,18614,42740.0%37.5%
23.08%132.21,01010,85522.2%25.0%
46.15%136.01,24613,80450.0%44.4%
53.85%137.11,16413,19242.9%66.7%
50.00%123.71,31914,92180.0%28.6%
50.00%121.21,22814,55325.0%62.5%
25.00%126.51,36414,04133.3%16.7%
83.33%121.41,23815,11766.7%88.9%
25.00%121.61,12615,19325.0%25.0%
66.67%127.31,53918,810100.0%60.0%
25.00%121.21,07613,8870.0%60.0%
50.00%121.31,03811,95450.0%50.0%
63.64%116.81,40515,26060.0%66.7%
63.64%112.91,09213,99266.7%62.5%
27.27%111.31,12512,25020.0%33.3%
18.18%111.51,18312,73025.0%14.3%
45.45%116.71,23014,91440.0%50.0%
70.00%105.91,26912,68760.0%80.0%
60.00%107.01,16813,68960.0%60.0%
60.00%101.41,38813,38660.0%60.0%
70.00%107.11,33314,53075.0%66.7%
33.33%97.31,21213,57820.0%50.0%
44.44%93.899013,717100.0%28.6%
22.22%96.81,08812,89120.0%25.0%
66.67%91.61,56915,98675.0%60.0%
66.67%91.81,22714,33780.0%50.0%
33.33%94.81,07213,64425.0%40.0%
50.00%86.71,22114,59460.0%33.3%
37.50%81.81,33816,668100.0%28.6%
42.86%72.11,10612,56733.3%50.0%
42.86%72.21,17211,38060.0%0.0%
42.86%72.01,37413,47750.0%33.3%
42.86%77.21,12512,97033.3%50.0%
71.43%75.71,05413,5520.0%100.0%
71.43%71.21,49615,8850.0%83.3%
14.29%72.91,23213,7160.0%33.3%
57.14%72.01,19112,95466.7%50.0%
42.86%72.11,19315,03550.0%40.0%
85.71%71.61,34617,646100.0%80.0%
57.14%72.81,23515,411100.0%40.0%
50.00%66.91,27912,34425.0%100.0%
66.67%61.31,38414,20166.7%66.7%
66.67%61.396311,486100.0%50.0%
33.33%65.41,55214,5320.0%33.3%
33.33%62.481311,29650.0%0.0%
66.67%64.01,15114,6630.0%80.0%
16.67%61.41,19215,1100.0%20.0%
50.00%61.61,26817,2400.0%60.0%
60.00%55.91,19113,24966.7%50.0%
40.00%51.61,10312,8790.0%66.7%
40.00%56.81,00311,9160.0%50.0%
60.00%55.11,47719,353100.0%50.0%
20.00%52.81,10312,98150.0%0.0%
60.00%53.17289,38375.0%0.0%
60.00%57.11,03414,8450.0%75.0%
20.00%58.21,15513,53650.0%0.0%
60.00%52.382213,48466.7%50.0%

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Karthus vs Udyr - Frequently Asked Questions

How does Karthus do against Udyr in League of Legends?

Udyr wins the Karthus vs Udyr matchup with a 57.1% win rate compared to Karthus's 42.9%, a 14.3 percentage point difference. This data is based on 7 recent ranked games in patch 26.7.

How does Karthus do against Udyr in the early game?

In the early game, Karthus has the advantage against Udyr with a 50.0% win rate versus 50.0%. 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 Udyr in the late game?

In the late game, Udyr takes over the Karthus vs Udyr matchup with a 60.0% win rate compared to 40.0%. Udyr scales better into team fights and objective contests after 25 minutes.

Who wins the Karthus vs Udyr matchup?

Udyr wins the matchup against Karthus with a 57.1% win rate in League of Legends patch 26.7. The 14.3 percentage point advantage means Udyr is significantly favored in this lane matchup based on 7 games analyzed.

What is the best Karthus build against Udyr?

The best Karthus build against Udyr includes Shadowflame, Void Staff, Rabadon's Deathcap with Sorcerer's Shoes. This build achieves a 50.0% win rate in the matchup. Check the matchup breakdown above for the full item path and build order.

What are the best Karthus runes against Udyr?

The best Karthus runes against Udyr use the Domination primary tree with Precision secondary. This rune setup achieves a 100.0% win rate in the Karthus vs Udyr matchup. See the full rune breakdown in the matchup comparison above.

Does Karthus counter Udyr?

No, Karthus struggles against Udyr with only a 42.9% win rate. Udyr has the advantage in this matchup. Karthus players should focus on safe farming and avoiding extended trades to minimize Udyr's lead.

How do I play Karthus against Udyr?

When playing Karthus against Udyr, play cautiously and avoid Udyr's power spikes. Look for jungle assistance and team-dependent plays since Udyr has the statistical advantage at most stages. Use the matchup-specific build and runes above to optimize your chances.