Rust Decay
Calculate how long structures and vehicles take to decay in the game Rust based on material type and current health percentage. Free online Rust decay time tool.
About This Calculator
The Rust Decay Calculator helps Rust players determine exactly how long their structures and vehicles will take to decay based on the material type and current health. Whether you are planning your base maintenance schedule or checking how long you have before a damaged wall collapses, this tool gives you precise decay times in hours, minutes, and seconds.
Decay in Rust is calculated using a simple formula: Decay Time = Standard Decay Time / (Current HP / 100). Each material has a standard decay time at 100% health — Twig (1 hour), Wood (3 hours), Stone (5 hours), Sheet Metal (8 hours), and Armoured (12 hours). As your structure takes damage, its health percentage drops, and the decay time shortens proportionally. For example, a stone wall at 50% health will decay in 10 hours instead of 5, because the effective decay rate doubles.
Regular maintenance is essential to prevent decay. The Tool Cupboard (TC) must be filled with the same materials your structures are made of. Once the resources in the TC run out, decay initiates, and your base will start losing health. Keeping your TC stocked ensures your base remains standing through online and offline play sessions.
Understanding decay is crucial for both solo players and large clans. A well-maintained base survives longer, saving you from having to gather resources repeatedly to rebuild. Use this calculator to plan your upkeep schedule, estimate how long damaged sections will last, and optimize your resource allocation for maximum base longevity.
Frequently Asked Questions
How does decay work in Rust?
Decay in Rust is a game mechanic where player-made structures and vehicles slowly deteriorate over time if not maintained. The decay rate depends on the material type of the structure and its current health percentage. Twig decays in 1 hour, Wood in 3 hours, Stone in 5 hours, Sheet Metal in 8 hours, and Armoured in 12 hours at full health.
How do I calculate decay time in Rust?
To calculate decay time in Rust, determine the material type of your structure (Twig, Wood, Stone, Sheet Metal, or Armoured), find the standard decay time for that material, check the structure's current health percentage, and divide the standard decay time by the current health percentage in decimal form.
How do I stop decaying in Rust?
To stop decaying in Rust, use a Tool Cupboard and fill it with the materials your structure is made of. Keep it regularly stocked with resources, and repair any damaged parts of your structure to prevent decay from progressing.
How long does it take for wood to decay in Rust?
Wood takes 3 hours to decay in Rust at 100% health. If the current health is lower, divide 3 hours by the health percentage in decimal form. For example, at 50% health wood will decay in 6 hours.
How long does it take for stone to decay in Rust?
Stone takes 5 hours to decay in Rust at 100% health. If the current health is lower, divide 5 hours by the health percentage in decimal form. Stone is more resilient than wood, giving you more time between maintenance rounds.
Do cars decay in Rust?
Yes, cars and other vehicles in Rust decay over time. The decay mechanics for vehicles follow the same principles as structures — they deteriorate based on material type and current health. Regular maintenance with a Tool Cupboard prevents vehicle decay.
What is the Rust decay tick rate?
The default decay tick rate in Rust is 300 seconds (5 minutes). Server administrators can modify this setting, which will alter the decay timing. Our calculator assumes the default tick rate of 300 for all calculations.
Is this calculator free to use?
Yes, this Rust Decay Calculator is completely free to use with no registration required. Your inputs are saved in the URL so you can share calculations with your Rust teammates.