Rust Decay Calculator
How long you can stay offline before the base is gone.
Outside a tool cupboard's range, or inside one that has run dry, a structure loses health at a fixed rate until it is rubble. The rate is a fraction of the tier's maximum health per hour, which is why a stone wall and a stone floor take the same five hours despite different absolute health.
Decay is not the same as raiding. A base that decays leaves nothing to loot and takes nothing from anyone; it just stops being yours. The practical question is how long a trip, a work week or a holiday can be before there is no point coming back — and the honest answer usually argues for a smaller base with upkeep you can actually afford, not a bigger one.
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Common questions
Does decay run while I am offline?
Yes. Decay is a server-side timer and does not care whether you are logged in. Only upkeep in a stocked tool cupboard stops it.
Does a tool cupboard stop decay completely?
While it has the resources for upkeep, yes. When it empties, decay starts as if the cupboard were not there, so a full cupboard is a countdown, not a fix.
Do these times change between servers?
They can. Decay rates are a server variable, and modded servers often slow them down or turn them off. The figures here are the vanilla defaults.
Does a wipe matter for decay?
Only in the sense that everything is gone anyway. If your server wipes weekly, no decay timer above a week is worth planning around.
Figures checked on Aug 22, 2026 against rust.fandom.com
Game names are used to identify what these tools calculate for. SV.GAMES is not affiliated with, endorsed by or sponsored by any publisher.