Boss respawn calculator

What should I enter?

Record the death time you actually observed for a particular boss, server and channel. Use an interval supported by the current game or a reliable record for that same boss. If you only saw that a boss was absent, that is not a confirmed kill time. This calculator has no preset boss intervals because those values have not been verified here.

How is the estimate calculated?

The central estimate is kill time plus the interval in elapsed hours. The uncertainty range subtracts and adds the number of minutes you enter. It represents your chosen tolerance, not a measured spawn probability. Your device’s time zone converts the date input into a timestamp; check it if a daylight-saving transition makes a local time ambiguous.

Can I share this as a live spawn report?

Label it as an estimate. Another player’s kill or a changed respawn rule can invalidate the calculation. The report stays in local browser storage and is not shared with other players. Clear the report if the kill time was wrong, and create a new estimate from a confirmed observation.