PoE Aura Reservation & Effect Calculator
Select Auras to Reserve
Calculation Results
Explanation: The calculator first applies your "Reduced Mana Reservation" to each selected aura's base cost to find its effective reservation. These effective percentages are summed to get the total reservation percentage. This is then converted to a flat mana cost based on your "Total Mana" pool. "Mana Remaining" is your total mana minus the total flat mana reserved. "Effective Aura Effect Multiplier" is calculated from your "Increased Aura Effect" to show the true power of your auras.
Mana Allocation Chart
What is Aura Calculator PoE?
The Aura Calculator PoE is an essential tool for Path of Exile players aiming to optimize their character builds. In PoE, Auras are powerful buffs cast by your character that grant continuous benefits to you and your allies within a certain radius. These buffs, however, come at a cost: they "reserve" a portion of your mana or life, meaning that mana/life cannot be used for other skills. This calculator helps you manage this crucial resource.
Players should use this calculator to plan their aura setups, especially when building aura stacking builds or any character that relies heavily on multiple auras. Common misunderstandings include miscalculating the cumulative effect of "reduced mana reservation" modifiers or underestimating the impact of "increased aura effect." Our tool provides clear, precise calculations to eliminate guesswork.
Aura Calculator PoE Formula and Explanation
Understanding the underlying mechanics is key to effectively using the Aura Calculator PoE. The primary calculation revolves around how mana reservation is reduced and how aura effects are amplified.
Mana Reservation Formula:
The mana reserved by an individual aura is calculated as follows:
Effective Reservation % = Base Reservation % * (1 - Total Reduced Mana Reservation %)
Then, the total flat mana reserved is:
Total Mana Reserved (Flat) = Total Mana * (Sum of all Effective Reservation % / 100)
Effective Aura Effect Formula:
The actual power of your auras is amplified by increased aura effect modifiers:
Effective Aura Effect Multiplier = 1 + (Total Increased Aura Effect % / 100)
This multiplier is applied directly to the numerical benefits of your auras (e.g., if a Purity of Fire grants 40% maximum fire resistance, and you have 50% increased aura effect, it will grant 40 * 1.5 = 60% maximum fire resistance).
Variables Table:
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Total Mana | Your character's maximum mana pool. | Mana Points | 100 - 10,000+ |
| Reduced Mana Reservation (%) | Sum of all modifiers that reduce mana reserved. | Percentage (%) | 0 - 80% (capped by 100% effective cost) |
| Increased Aura Effect (%) | Sum of all modifiers that increase aura effectiveness. | Percentage (%) | 0 - 200%+ |
| Base Reservation % | The default percentage of mana an aura reserves. | Percentage (%) | 10 - 50% |
Practical Examples Using the Aura Calculator PoE
Let's walk through a couple of scenarios to demonstrate how the Aura Calculator PoE works and how it can inform your build decisions.
Example 1: Basic Aura Setup
Scenario: You have 1200 Total Mana, 25% Reduced Mana Reservation, and 10% Increased Aura Effect. You want to run Determination (50% base), Grace (50% base), and Purity of Elements (50% base).
- Inputs:
- Total Mana: 1200
- Reduced Mana Reservation: 25%
- Increased Aura Effect: 10%
- Selected Auras: Determination, Grace, Purity of Elements
- Calculation:
- Effective Reservation for each (50% base): 50% * (1 - 0.25) = 37.5%
- Total Effective Reservation: 37.5% + 37.5% + 37.5% = 112.5% (This is over 100%, meaning you cannot run all three without further reductions or higher mana)
- If only running two (e.g., Determination + Grace): 37.5% + 37.5% = 75%
- Flat Mana Reserved (for two auras): 1200 * 0.75 = 900 Mana
- Mana Remaining: 1200 - 900 = 300 Mana
- Effective Aura Effect Multiplier: 1 + (10 / 100) = 1.1 (or 110%)
- Results (for two auras):
- Total Mana Reserved: 75% (900 Mana)
- Mana Remaining: 300 Mana
- Effective Aura Effect Multiplier: 110%
- Total Active Auras: 2
This example highlights that with only 25% reduced reservation, running three 50% auras is impossible. The calculator immediately shows you this, allowing you to adjust your build by finding more reduced reservation or dropping an aura.
Example 2: Aura Stacker with High Investment
Scenario: You have 800 Total Mana (using Eldritch Battery for ES skills), 48% Reduced Mana Reservation, and 150% Increased Aura Effect. You want to run Determination (50%), Grace (50%), Purity of Elements (50%), Malevolence (50%), and Discipline (35%).
- Inputs:
- Total Mana: 800
- Reduced Mana Reservation: 48%
- Increased Aura Effect: 150%
- Selected Auras: Determination, Grace, Purity of Elements, Malevolence, Discipline
- Calculation:
- Effective Reservation for 50% Auras: 50% * (1 - 0.48) = 50% * 0.52 = 26%
- Effective Reservation for Discipline (35% base): 35% * 0.52 = 18.2%
- Total Effective Reservation: (26% * 4) + 18.2% = 104% + 18.2% = 122.2%
- This is still over 100%. Even with 48% RMR, running five strong auras might be too much. You'd need approximately 50% RMR to get 50% auras down to 25%, allowing 4 of them to fit (100%). With 5 auras, you'd need closer to 60% RMR.
- Let's assume you manage to get 50% RMR instead:
- Effective Reservation for 50% Auras: 50% * (1 - 0.50) = 25%
- Effective Reservation for Discipline (35% base): 35% * 0.50 = 17.5%
- Total Effective Reservation: (25% * 4) + 17.5% = 100% + 17.5% = 117.5%
- Even with 50% RMR, it's 117.5%. This means you can only run four 50% auras and Discipline if you get 50% RMR and have enough mana.
- If you decide to run 4x 50% auras with 50% RMR: Total 100%. Mana Reserved = 800 * 1.00 = 800. Mana Remaining = 0.
- Effective Aura Effect Multiplier: 1 + (150 / 100) = 2.5 (or 250%)
- Results (for four 50% auras with 50% RMR):
- Total Mana Reserved: 100% (800 Mana)
- Mana Remaining: 0 Mana
- Effective Aura Effect Multiplier: 250%
- Total Active Auras: 4
This example demonstrates the tight margins in aura stacking. The calculator helps you pinpoint exactly how much reduced reservation you need or which auras you might have to drop to fit your build.
How to Use This Aura Calculator PoE
Using the Aura Calculator PoE is straightforward, designed for both new and veteran players to quickly get the information they need. Follow these steps for optimal results:
- Enter Total Mana: Input your character's total mana pool. This is usually found on your character sheet.
- Enter Reduced Mana Reservation (%): Sum up all sources of "reduced mana reserved" from your passive tree, ascendancy, gear (e.g., Enlighten Support Gem, helmet enchantments, conqueror's efficiency), and masteries. Enter the total percentage here.
- Enter Increased Aura Effect (%): Sum up all sources of "increased aura effect" from your passive tree (e.g., leadership), ascendancy, and unique items (e.g., replica victario's charity).
- Select Auras: Check the boxes next to all the auras you intend to run. The calculator has a comprehensive list of common auras with their base reservation costs.
- Click "Calculate Auras": The calculator will instantly update the results section with your total mana reserved, mana remaining, and effective aura effect.
- Interpret Results:
- Total Mana Reserved: Shows the percentage and flat mana cost of all your chosen auras combined.
- Mana Remaining: Indicates how much mana you have left for casting other skills, movement abilities, or defensive layers.
- Effective Aura Effect Multiplier: This is a crucial metric for aura stackers, showing the true power boost your auras provide.
- Total Active Auras: A simple count of how many auras you have selected.
- Adjust and Optimize: If your mana remaining is too low, or your reservation is too high, go back and adjust your inputs. Try adding more reduced mana reservation, removing an aura, or increasing your total mana pool. Use the PoE Build Planner to experiment with gear and passive tree changes.
- Copy Results: Use the "Copy Results" button to easily share your calculations or save them for later reference.
Key Factors That Affect Aura Reservation & Effect in PoE
Optimizing your aura setup involves understanding several interconnected factors. The Aura Calculator PoE helps you model these interactions.
- Reduced Mana Reservation: This is the most critical stat for running more auras. Sources include passive tree nodes (e.g., Charisma, Sovereignty), masteries, support gems (Enlighten), unique items (e.g., Alpha's How, Prism Guardian), and helmet enchantments. Stacking this stat is key for aura stacking builds.
- Increased Aura Effect: This directly amplifies the benefits of your auras. Sources include passive tree nodes (e.g., Leadership, Guardian ascendancy), unique items (e.g., Presence of Chayula, Replica Victario's Charity), and cluster jewels. More aura effect means more damage, defense, or utility.
- Total Mana Pool: A larger mana pool means you can reserve more flat mana, even if the percentage reservation remains high. However, relying solely on a large mana pool without sufficient reduced reservation is inefficient. Some builds use Eldritch Battery to allow Energy Shield to pay for skills, freeing up mana for full reservation.
- Aura Gem Levels: Higher-level aura gems often provide stronger base effects, making increased aura effect even more valuable. However, the base mana reservation percentage usually remains constant for most auras.
- Specific Unique Items & Masteries: Many unique items and passive tree masteries offer unique interactions with auras, such as "Auras from your Skills have 10% increased Effect" or "Skills have 20% reduced Mana Cost if you've been hit recently." These are crucial for fine-tuning.
- Divine Blessing Support: This gem allows you to convert an aura into a temporary blessing, consuming a large amount of mana upfront instead of reserving it. This allows for bursting an extra aura when needed without permanent reservation.
- Lifetap Support: This support gem makes skills cost life instead of mana, effectively freeing up mana for reservation.
Frequently Asked Questions about Aura Calculator PoE
A: If your Total Mana Reserved percentage exceeds 100%, it means you do not have enough mana or enough "reduced mana reservation" to run all your selected auras simultaneously. You'll need to either deselect some auras, find more sources of reduced mana reservation, or increase your total mana pool.
A: Yes, generic "reduced mana reservation" modifiers apply universally to all skills that reserve mana. The calculator applies this modifier to each selected aura's base reservation individually before summing them up.
A: "Increased Aura Effect" directly amplifies the numerical benefits of your auras. For example, if Determination grants 5000 Armour and you have 50% increased aura effect, it will grant 7500 Armour (5000 * 1.5). It does NOT affect mana reservation.
A: Reduced Mana Reservation typically ranges from 0% to around 70-80% for highly optimized aura stackers. Increased Aura Effect can range from 0% to over 200% in extreme cases, usually with significant investment in passive tree, unique items, and cluster jewels. The Aura Calculator PoE supports a wide range to cover all build types.
A: While the current "Total Mana" input is specific to mana, the underlying reservation percentage mechanics are similar for life reservation. You can conceptually use your total life as "Total Mana" and select the auras, but remember the "Mana Remaining" would then represent "Life Remaining." For explicit life reservation, a separate calculator might be more precise.
A: These items provide "reduced mana reservation" for specific types of auras or all auras. You should sum up all such modifiers and input the total percentage into the "Reduced Mana Reservation (%)" field. For example, if Prism Guardian lets you run 3 auras on life, you effectively have 100% reduced mana reservation for those 3 auras (relative to mana), but you'd need to calculate their life reservation separately.
A: If "Mana Remaining" is 0, it means you have no mana left for casting other skills. Builds that reserve 100% of their mana often rely on alternative methods for skill costs, such as Eldritch Battery (using Energy Shield for skill costs), Lifetap Support Gem (using life for skill costs), or only using skills that don't cost mana (e.g., Attack skills with specific passives). The Aura Calculator PoE helps confirm this state.
A: Yes, "Reservation Efficiency" is just another term for "Reduced Mana Reservation." All sources, whether they say "reduced mana reservation" or "mana reservation efficiency," should be added together and entered as a single percentage in the "Reduced Mana Reservation (%)" field.
Related Tools and Internal Resources
To further enhance your Path of Exile journey and complement the Aura Calculator PoE, explore these related resources:
- PoE Mana Reservation Guide: A comprehensive guide to understanding mana reservation mechanics in depth.
- Path of Exile Aura Stacking Builds: Discover popular and powerful build guides that leverage extensive aura setups.
- Official PoE Forums - Aura Discussions: Engage with the community and find advanced discussions on aura mechanics.
- Advanced Aura Mechanics Explained: A detailed breakdown of complex aura interactions and optimizations.
- PoEDB Aura List: A database for all skill gems, including their base mana reservation and effects.
- PoE Ninja Build Planner: An external tool to plan your entire character, including passive tree, gear, and skills.