Deadlock TTK Calculator

The formulas

Resist sources stack multiplicatively: total = 1 − (1 − r₁)(1 − r₂)…, so 20% and 15% make 32%. Shred sources stack the same way and are subtracted from the total. If shred is larger, resist goes negative and the target takes extra damage.

Effective health is the raw damage needed to kill: (health + barrier) ÷ (1 − effective resist). Against a mix, it's (health + barrier) × raw DPS ÷ the DPS that lands after resists.

The barrier takes damage first, with resists applied. Time to kill = barrier ÷ landed DPS + health ÷ (landed DPS − regen). The target starts at full health, so regeneration only counts once the barrier is gone, and it never refills the barrier.

Worked example

With the starting values, a 2,000 health target with a 300 barrier and 20% bullet resist faces 150 bullet DPS and 50 spirit DPS. 150 × 0.8 + 50 = 170 damage lands per second. The barrier breaks in 1.76 seconds and the health lasts another 11.76, so the time to kill is 13.53 seconds.

Effective health is 2,300 ÷ 0.8 = 2,875 against bullets only, 2,300 against spirit only, and 2,300 × 200 ÷ 170 = 2,706 against this mix.

Adding 10% bullet shred drops bullet resist to 10% and the time to kill to 12.43 seconds. Instead, giving the target 20 health regen per second raises it to 15.10 seconds.

Built-in data vs. your inputs

No hero or item data is built in, so nothing goes stale after a patch. The rules come from the Deadlock Wiki's Damage Resistance and Barrier pages, checked November 2026. Get health, barrier and resists from the target's stats panel or item tooltips, and DPS from your own build, for example the Deadlock DPS Calculator with no target resist.

Not modeled

Damage that doesn't arrive at a steady rate (use the Deadlock Burst Combo for burst), headshots (include them in the DPS you enter), lifesteal and burst healing, damage amplification and damage reduction effects, barriers that decay or refresh, effects that ignore barriers, and resist that changes during the fight.