Path of Exile Aura Reservation Calculator
Plan your mana and life reservation before you respec. Enter your totals, set reservation modifiers, and add auras to see if your build can sustain everything.
Auras / Reservation Skills
| Use | Skill | Base Value | Reservation Type | Remove |
|---|
Note: Aura values can change by patch and gem level. Use this as a fast planning tool, then verify final numbers in-game or Path of Building.
What this PoE aura calculator does
In Path of Exile, aura planning is one of the most important parts of build optimization. This calculator helps you quickly estimate how much mana or life your setup reserves after global reservation modifiers are applied. If you have ever equipped one extra aura and suddenly couldn’t cast your movement skill, this is exactly the tool you need.
How reservation is calculated
This page uses a practical formula that works well for planning:
- Final Reservation = Base Reservation × (1 + Increased%) × (1 - Reduced%) ÷ (1 + Efficiency%)
- The result is then applied to either your mana pool or life pool, depending on the reservation type.
- Percent-based auras scale with your total resource; flat auras reserve a fixed amount before modifiers.
For most users, this mirrors build planning behavior closely enough to make reliable decisions about passive trees, cluster jewels, and aura combinations.
How to use the calculator effectively
1) Set your real pools
Enter your total mana and total life from your character sheet. Avoid guessing. A small error in total mana can make a setup look possible when it actually fails in-game.
2) Add global reservation modifiers
Include your Reservation Efficiency from passives, item mods, and support interactions. If your build has explicit Reduced Reservation or penalties from Increased Reservation, include those too.
3) Add each aura or reservation skill
Pick skills from the dropdown, or choose Custom for niche setups. You can model classic aura stacks, herald blends, and life-reserved setups with Arrogance.
4) Review remaining unreserved resources
Look at both unreserved mana and unreserved life. A setup can technically “fit” while still feeling awful if your unreserved mana is too low to cast utility skills comfortably.
Popular aura planning scenarios
- Tanky Armour Build: Determination + Grace + Defiance Banner + Purity variant.
- Spell Crit Caster: Zealotry + Discipline + Herald + Clarity.
- DoT Setup: Malevolence + Grace + Purity of Elements.
- Phys Aura Stack: Pride + Determination + Banner + Precision tuning.
Use the tool to test alternatives quickly. Often, swapping a 50% aura for a 35% aura provides enough space for utility without major DPS loss.
Tips to reduce reservation pressure
- Take reservation efficiency wheels on the passive tree (for example, Sovereignty and nearby clusters).
- Use Enlighten support where possible.
- Seek helmet, amulet, or jewel modifiers that improve reservation efficiency.
- Lower gem level on flat reservation skills like Precision if your setup is tight.
- Consider whether a herald or banner gives better value than a full 50% aura.
Why this matters for real gameplay
Reservation planning is not just theorycrafting. It affects clear speed, boss uptime, defensive layers, and even quality-of-life. A build with 20 unreserved mana can feel clunky; a build with 120 unreserved mana may feel smooth and responsive. Use this calculator to hit your breakpoint before spending currency on final gear pieces.
Frequently asked questions
Does this replace Path of Building?
No. This calculator is a lightweight planner for quick aura checks. Path of Building remains the best full simulator.
Can I calculate life reservation with Arrogance?
Yes. Choose a life reservation type in the row and add the corresponding base value.
Are flat reservation numbers exact for all gem levels?
No. Flat reservation scales by gem level and can change by patch. Use the Custom option for exact values from your current character.