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

Karthusvs Fizz

DMage
Patch26.7
Matches949,984
LaneAll Lanes
TierAll Tiers
Last UpdatedApr 18, 2026
MethodologyData Methodology

Karthus vs Fizz is a decisive matchup in LoL patch 26.7. Karthus wins with a 66.7% win rate (+33.3%) over Fizz based on 6 games. Fizz wins the early laning phase while Karthus scales better into the late game. Below you'll find the best Karthus build, runes, laning stats, and strategies for the Karthus vs Fizz 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
Fizz - 66.7% win rateFizz(66.7%)
Karthus - 66.7% win rate in this matchup
Karthus
66.7% WR
VS
Fizz vs Karthus matchup - 33.3% win rate
Fizz
33.3% WR

Who Wins the Karthus vs Fizz Matchup?

Karthus wins the Karthus vs Fizz matchup
Winner
Karthus
Matches: 6
66.7%
Win Rate
33.3%
4.0
CS / min
3.9
1,151
DMG / min
722
14,663
Gold / game
14,725
219
Heal / min
238
457
DMG Mitigated / min
567
0.6
CC / min
0.4
0.0%
Early Game WR
100.0%
80.0%
Late Game WR
20.0%

Karthus vs Fizz Matchup Summary

The Karthus vs Fizz matchup is a decisive matchup in League of Legends ranked play. Based on 6 recent matches analyzed, Karthus wins with a 66.7% win rate compared to Fizz's 33.3%, giving Karthus a 33.3 percentage point advantage. Game phase dynamics play a critical role here: Fizz controls the early laning stage, but Karthus outscales as the game goes longer. The matchup shifts dramatically depending on game length — Fizz needs to press advantages before Karthus reaches their power spikes, while Karthus should focus on safe farming and hitting key item breakpoints. The most significant statistical gap is in damage output, where Karthus leads by 430 DMG/min — a difference that heavily influences the outcome of trades and skirmishes. Karthus players can confidently pick into Fizz and play aggressively from level 1. Look to establish lane dominance early through favorable trades and zone Fizz away from CS whenever possible. Understanding these matchup dynamics is essential for champion select decisions and in-game strategy when facing this lane opponent.

Karthus vs Fizz Laning Phase Breakdown

Karthus wins the laning phase against Fizz in League of Legends

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

Farming
4.0Karthus
3.9Fizz
Karthus and Fizz farm at nearly identical rates in this matchup, with only a 0.1 CS/min difference. Neither champion holds a meaningful farming advantage, so lane dominance will come from trading and jungle interaction rather than CS leads.
Damage
1,151Karthus
722Fizz
Karthus heavily out-damages Fizz by 430 DMG/min, dominating both short trades and all-in fights. Fizz 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
14,663Karthus
14,725Fizz
Karthus and Fizz generate nearly equal gold per game, with just a 62 gold difference. Neither champion has a clear economic advantage, so gold leads will depend on individual play quality, kill participation, and objective contributions.
Utility
0.6Karthus
0.4Fizz
Both Karthus and Fizz 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
676Karthus
805Fizz
Fizz heals and mitigates 129 more damage per minute than Karthus, providing moderate extra durability. This sustain edge allows Fizz to stay in lane longer between recalls and gradually win extended wars of attrition. Consider building early grievous wounds if playing Karthus.

Best Karthus Build Against Fizz

Spellslinger's Shoes is the optimal boots choice against Fizz, providing the mobility and stats Karthus needs most in this matchup. The top-performing core items for Karthus against Fizz are Luden's Echo, Shadowflame and Malignance. This combination gives Karthus an effective balance of damage, survivability, and utility for the matchup. This build performs exceptionally well, achieving a 100.0% win rate across 1 games — well above average and making it the top item path against Fizz. Adjustments may be needed based on team compositions and game state, but this build provides the strongest foundation for the Karthus vs Fizz matchup.

Early Game vs Late Game

Early Game
Fizz
100.0%
+100.0% advantage
Karthus early game win rateKarthus0.0%
Fizz early game win rateFizz100.0%
Late Game
Karthus
80.0%
+60.0% advantage
Karthus late game win rateKarthus80.0%
Fizz late game win rateFizz20.0%

Fizz dominates the early game (first 15 minutes) with a commanding 100.0% win rate — a 100.0 percentage point lead over Karthus. This lopsided early game means Fizz can dictate the pace of the lane from level 1, controlling trades, wave state, and river priority.

Karthus is far superior in the late game (25+ minutes), boasting a 80.0% win rate — 60.0 points above Fizz. Extended games heavily favor Karthus, whose kit and scaling make them a dominant force in team fights and objective control.

This matchup features a dramatic power shift: Fizz must aggressively press their early advantage and close out the game before Karthus reaches their scaling breakpoints. If Karthus survives the laning phase without falling too far behind, the matchup flips in their favor. Dragon and Rift Herald control are pivotal — the team that secures early objectives can snowball or buy time to scale.

Best Karthus Runes Against Fizz

Sorcery rune tree - Karthus primary runes vs FizzSorcery
Summon Aery - best Karthus rune vs FizzAxiom Arcanist - best Karthus rune vs FizzTranscendence - best Karthus rune vs FizzGathering Storm - best Karthus rune vs Fizz
Precision rune tree - Karthus secondary runes vs FizzPrecision
Last Stand - best Karthus rune vs FizzPresence of Mind - best Karthus rune vs Fizz
100.0% WR

Running Sorcery primary with Precision secondary allows Karthus to press their advantage against Fizz, amplifying the strengths that make this a favorable matchup.


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 Fizz - Frequently Asked Questions

How does Karthus do against Fizz in League of Legends?

Karthus wins the Karthus vs Fizz matchup with a 66.7% win rate compared to Fizz's 33.3%, a 33.3 percentage point difference. This data is based on 6 recent ranked games in patch 26.7.

How does Karthus do against Fizz in the early game?

In the early game, Fizz has the advantage against Karthus with a 100.0% win rate versus 0.0%. Fizz players should look to press their lane advantage through aggressive trades and wave control during the first 15 minutes.

How does Karthus do against Fizz in the late game?

In the late game, Karthus takes over the Karthus vs Fizz matchup with a 80.0% win rate compared to 20.0%. Karthus scales better into team fights and objective contests after 25 minutes.

Who wins the Karthus vs Fizz matchup?

Karthus wins the matchup against Fizz with a 66.7% win rate in League of Legends patch 26.7. The 33.3 percentage point advantage means Karthus is significantly favored in this lane matchup based on 6 games analyzed.

What is the best Karthus build against Fizz?

The best Karthus build against Fizz includes Luden's Echo, Shadowflame, Malignance with Spellslinger's Shoes. This build achieves a 100.0% 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 Fizz?

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

Does Karthus counter Fizz?

Yes, Karthus has a favorable matchup against Fizz with a 66.7% win rate. Karthus strongly counters Fizz in lane based on current patch 26.7 data.

How do I play Karthus against Fizz?

When playing Karthus against Fizz, leverage your statistical advantages by trading aggressively during favorable windows. Play safe early and scale into your power spikes where you outperform Fizz. Build the recommended items and runes for this specific matchup for the best results.