Calculate Rust structure decay time for all materials - Twig, Wood, Stone, Sheet Metal, and Armoured. Calculate how long your base takes to decay based on HP percentage. Includes vehicle decay calculator for minicopters and cars. Plan your base maintenance and raiding strategies effectively.
Our Rust decay calculator uses the official game mechanics to calculate exactly how long your structures and vehicles will last before fully decaying. Understanding this formula helps you plan base maintenance and raiding strategies.
Decay Time = Base Material Decay Time × (Current HP Percentage / 100)A wooden wall at full health
3 hours × (100 / 100) = 3 hoursWill fully decay in 3 hours without maintenance
A damaged stone foundation
5 hours × (50 / 100) = 2.5 hoursWill fully decay in 2.5 hours due to damage
A heavily damaged sheet metal door
8 hours × (25 / 100) = 2 hoursNeeds urgent repair within 2 hours
A slightly damaged armoured wall
12 hours × (75 / 100) = 9 hoursStill has 9 hours before full decay
Place a Tool Cupboard and stock it with building materials to create a decay-free zone. Authorized players' structures within range won't decay as long as resources remain.
Decay time depends on material type and current HP. Lower health = faster decay. Server settings (decaytickrate) can modify default times but formula remains the same.
Use a hammer and matching materials to repair damaged structures. Repairing to full health resets decay time to maximum for that material type.
| Material | Decay at 100% HP | Decay at 50% HP | Decay at 25% HP | Best Use |
|---|---|---|---|---|
| 🪵 Twig | 1 hour | 30 min | 15 min | Temporary scaffolding |
| 🏠 Wood | 3 hours | 1.5 hours | 45 min | Starter bases |
| 🪨 Stone | 5 hours | 2.5 hours | 1.25 hours | Mid-tier bases |
| 🏭 Sheet Metal | 8 hours | 4 hours | 2 hours | High-tier bases |
| 🛡️ Armoured | 12 hours | 6 hours | 3 hours | Maximum security |
Place cupboards strategically to cover your entire base with decay protection.
Keep cupboards filled with materials matching your structure types.
Twig decays in just 1 hour - upgrade to wood or better immediately.
Check base condition and cupboard supplies every few days.
Lower HP accelerates decay - repair structures after raids immediately.
Calculate decay times to plan when structures need attention.
Decay in Rust is a mechanism that slowly deteriorates player-made structures over time to keep servers clean. Structures decay based on their material type and current health percentage. The decay rate is controlled by the server's decaytickrate setting (default 300).
To prevent decay, you need to use a Tool Cupboard and keep it stocked with the same materials your structures are made of. The Tool Cupboard creates a protected zone around your base. Keep it filled with resources to maintain your buildings indefinitely.
At 100% health: Twig decays in 1 hour, Wood in 3 hours, Stone in 5 hours, Sheet Metal in 8 hours, and Armoured structures in 12 hours. Lower health percentages reduce decay time proportionally.
Yes, vehicles in Rust follow the same decay mechanics as structures. Minicopters, boats, cars, and other vehicles will decay based on their material type and health. Regular maintenance or storage in a protected zone prevents decay.
Take the base decay time for the material type and multiply it by the current health percentage (as a decimal). For example, a Wood structure at 50% health will decay in 1.5 hours instead of 3 hours.
The default decaytickrate is 300. This setting can be modified by server administrators. Our calculator assumes the default rate. If your server uses a different rate, decay times will be proportionally faster or slower.
Yes, you can repair structures using the same materials they're made of. Use a hammer to repair damaged parts. However, once decay begins, it will continue until the structure is either repaired to full health or the Tool Cupboard is restocked.
Check your base regularly, especially after extended absences. Twig structures decay in just 1 hour, so monitor them closely. For more permanent bases, check every few days and ensure your Tool Cupboard remains stocked.
Wood structures in Rust decay in 3 hours at 100% health. If the structure is damaged, decay time is reduced proportionally. For example, wood at 50% HP decays in 1.5 hours. Keep your Tool Cupboard stocked with wood to prevent decay.
To stop decay in Rust: 1) Place a Tool Cupboard within range of your structures, 2) Authorize yourself on the cupboard, 3) Keep it filled with building materials matching your structure types (wood, stone, metal, etc.). The cupboard creates a decay-free zone when properly maintained.
The Rust decay calculator formula is: Decay Time = Base Material Decay Time × (Current HP / 100). For example, Stone at 100% HP decays in 5 hours. At 60% HP: 5 × 0.60 = 3 hours. Use our calculator for instant results.
Rust minicopter decay time depends on its health percentage and material composition. At full health, a minicopter typically decays in 8 hours (sheet metal equivalent). Damaged minicopters decay faster. Store in a base with Tool Cupboard to prevent decay.
Yes, cars in Rust decay following the same mechanics as structures. A car at full health decays in approximately 3-5 hours depending on server settings. Park vehicles inside your base's Tool Cupboard range to prevent decay.
Stone structures in Rust decay in 5 hours at 100% health. This makes stone a good mid-tier building material for bases. Lower health percentages reduce decay time - stone at 40% HP decays in just 2 hours.
Twig is the fastest decaying material in Rust, lasting only 1 hour at full health. It's meant for temporary structures and scaffolding. Always upgrade from twig quickly to prevent rapid decay and easy raiding.
Structures within Tool Cupboard range don't decay if the cupboard is properly stocked. Without a cupboard or when it runs out of resources, use our calculator: select material type and current HP to get exact decay time remaining.
Yes, Armoured structures decay in Rust but very slowly - 12 hours at 100% health. This makes armoured the most decay-resistant material. Even at 50% HP, armoured lasts 6 hours, giving you plenty of time for repairs.
Eco raiding in Rust means using minimal resources to raid by exploiting decay. Raiders damage structures to low HP, wait for faster decay, then finish them off. Our calculator helps defenders know exactly when structures will decay to plan repairs.
Sheet Metal structures in Rust decay in 8 hours at full health. This high-tier material provides excellent protection and good decay resistance. At 75% HP, sheet metal lasts 6 hours before fully decaying.