KF2 Wave & ZED Calculator

Calculate ZED spawn counts per wave based on your player count, difficulty, and game length. Includes special ZED composition, boss wave info, and estimated session time. All values update live.

Server Configuration

1 6

Affects ZED count and composition

Endless/Weekly increase spawn rates

Normal 10 waves + boss • 675 total ZEDs • ~16 min session • 29 DPS/player needed

Wave Breakdown

ZED counts scaled for 6 players on Normal — Long game (Survival mode).

Wave Total ZEDs Trash ZEDs Special ZEDs Cumulative Composition Scale
Wave 1 33 30 3 33 Clots, Gorefasts, Husks
Wave 2 41 38 3 74 Clots, Gorefasts, Husks
Wave 3 48 44 4 122 Clots, Gorefasts, Husks
Wave 4 56 45 11 178 Sirens, Bloats, Scrakes
Wave 5 64 51 13 242 Sirens, Bloats, Scrakes
Wave 6 71 57 14 313 Sirens, Bloats, Scrakes
Wave 7 79 55 24 392 Scrakes, Fleshpounds, Quarterpounds
Wave 8 87 61 26 479 Scrakes, Fleshpounds, Quarterpounds
Wave 9 94 66 28 573 Scrakes, Fleshpounds, Quarterpounds
Wave 10 102 71 31 675 Scrakes, Fleshpounds, Quarterpounds
Boss Wave 15 15 trash 1 boss 690 Patriarch

Session Summary

Total ZEDs

690

including boss wave trash

Est. Session Time

16 min

at ~2 ZEDs/sec kill rate

Squad DPS Needed

29

DPS per player (avg ZED ~150 HP)

Special ZED Peak

30%

on final wave

Special ZED Composition by Wave

Approximate spawn pool based on wave progression. Exact composition varies per game.

Waves 1–3 (early) Clots, Cysts, Crawlers, Gorefasts, Husks

~8% specials

Waves 4–6 (mid) Sirens, Bloats, Scrakes, E.D.A.R.s

~20% specials

Waves 7–10 (late) Scrakes, Fleshpounds, Quarterpounds, Hans adds

~30% specials

KF2 Boss Reference

One of five bosses is chosen randomly each game. Each has distinct mechanics and weaknesses.

Boss Weak Spot Main Threat Recommended Perks
Patriarchthis game Chest (exposed heart) Tentacle grab, minigun, rockets, self-heal Demolitionist, Gunslinger, Sharpshooter
Hans Volter Head / body (no armor phase) Nerve gas grenades, drone swarms, HP drain on grab Medic, SWAT, Field Medic
King Fleshpound Head / rage mode exposed core Rage charge, shockwave, armor plating Berserker, Sharpshooter, Demolitionist
Abomination Exposed weak points (glowing sacs) Vomit explosion, spawns Abomination Spawn ZEDs Firebug, Demolitionist, Commando
Matriarch Head (exposed during scan phase) Plasma cannon, EMP, tentacle slam, shields Sharpshooter, Gunslinger, Support

ⓘ "This game" boss shown above is a random example — KF2 picks the boss at round start. The highlighted boss updates as you adjust settings.

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