Spawn Rate Calculator

This calculator models a simple steady-state spawn system: it assumes the spawner perfectly replaces whatever players kill, so Spawns / Minute is set directly equal to Kills per Minute rather than being derived from Respawn Delay. That single assumption drives most of the output -- Spawn Interval is just 60 divided by the kill rate, and Kills per Minute is the input that moves both figures the most. Steady-State Count estimates how many entities are typically alive at once by subtracting the entities "in respawn" (kills per minute times respawn delay, converted to a fraction of a minute) from Max Entities, floored at zero so it never reports a negative population. Clear Time answers a different question -- how long it would take to wipe out every entity with no respawning at all -- and is independent of Respawn Delay entirely.

Variety Index is a rough diversity estimate (spawn pool size relative to max entities), not a true probability distribution; it assumes uniform random selection from the pool, which real spawn tables rarely use once weighting or cooldowns are involved. What this calculator does not model: burst spawning, spawn caps that lag behind kills, or any cooldown on individual entity types. Respawn Delay only affects Steady-State Count, not the spawn rate or interval figures -- a detail that surprises many designers tuning encounters for the first time. At Kills per Minute = 0, both Spawn Interval and Clear Time report "Never" rather than a number: with nothing being killed, the spawner never needs to replace anything and the arena is never cleared, so a numeric answer (like 0 seconds) would misleadingly read as "instant" instead of the honest "this never happens."