🎯 About This Calculator

This advanced Risk of Rain 2 item stat calculator provides accurate calculations for all item stacking mechanics, including linear, hyperbolic, exponential, and special stacking formulas.

Features:

• Complete item database for all game versions
• Accurate stacking formulas validated against game data
• Real-time stat calculations & build analysis
• Clean, responsive, and embeddable design

📖 How to Use

1. Select an item from the dropdown menu

2. Enter stack count (number of that item you have)

3. Click "Add Item" to add it to your build

4. View real-time stats in the right panel

5. Experiment with different combinations to optimize your build

The calculator automatically applies the correct stacking formula for each item type and shows you the exact mathematical formulas being used.

🧮 Stacking Types Explained

Linear: f(x) = 1 + a×x (most items)

Hyperbolic: f(x) = 1 - 1/(1 + a×x) (Tougher Times, Stun Grenade)

Exponential: f(x) = a^x (Shaped Glass, Alien Head)

Reciprocal: f(x) = a/x (cooldown reductions)

Where 'a' is the base effect and 'x' is the number of stacks. Each formula prevents game-breaking combinations while maintaining item effectiveness.

💡 Pro Tips

• Critical Mass: Some items like Soldier's Syringe become extremely powerful with many stacks
• Diminishing Returns: Hyperbolic items like Tougher Times have diminishing returns - focus on variety
• Synergies: Combine crit chance items with crit damage items for maximum effect
• Balance: A balanced build usually outperforms extreme specialization
• Lunar Items: Powerful but come with significant drawbacks - use carefully

🔧 Technical Details

This calculator uses the exact formulas from the Risk of Rain 2 source code and wiki data. All calculations are performed client-side for instant results.

Accuracy: Formulas are validated against in-game testing and community data.

Performance: Optimized JavaScript ensures smooth performance even with complex builds.

Updates: Item data is regularly updated to reflect game patches and balance changes.

🎮 Game Information

Risk of Rain 2 is a 3D rogue-like developed by Hopoo Games. This calculator supports all items from the base game and its DLCs.

• Base Game (2019-2020)
• Survivors of the Void (2022)
• Seekers of the Storm (2024)

Visit the official wiki for more detailed information about items and mechanics.