PoE Recombinator Calculator

Estimate your crafting success rate when using Path of Exile’s Recombinators. This tool calculates the probability of transferring desired modifiers from two items onto a new one.

Item 1 (Donor)

Item 2 (Sacrifice)

Desired Outcome

Estimated Probability of Success

–%

Prefix Pool: —

Suffix Pool: —

Expected Affixes: —

What is a PoE Recombinator?

A PoE Recombinator is a powerful, yet risky, crafting currency item in Path of Exile. Originally introduced in the Sentinel league, these orbs allow a player to take two items of the same item class (e.g., two pairs of gloves, two body armours) and combine them into a single new item. The goal is to merge the best modifiers from both items onto one superior base. This makes the poe recombinator calculator an essential tool for any serious crafter looking to manage risk. The process is unpredictable; it can result in a worthless item or a god-tier masterpiece.

When a Recombinator is used, one of the two base items is chosen as the new template for things like sockets, links, and the item base type. Then, the modifiers from both items are pooled together, and the game randomly selects a new set of modifiers for the resulting item. This process can even transfer special modifiers like Influence, Essence, or Delve mods, making it a unique and high-stakes crafting method.

PoE Recombinator Formula and Explanation

The exact algorithm used by GGG for recombinators is not public. However, the process can be effectively modeled using statistical probability, specifically the hypergeometric distribution. This is what our poe recombinator calculator uses to provide an estimate. The core idea is to calculate the probability of picking your desired modifiers from the total pool of available modifiers.

The calculation is performed independently for prefixes and suffixes and then multiplied together:

P(Total Success) = P(Prefix Success) × P(Suffix Success)

The probability for each affix type is calculated as: `P(X=k) = [C(K, k) * C(N-K, n-k)] / C(N, n)]`, where `C(n,k)` is the number of combinations. This formula calculates the odds of picking exactly `k` desired mods from a pool of `N` total mods.

Variables Table

Variables used in the PoE Recombinator Calculator.

Variable	Meaning	Unit	Typical Range
P1 / S1	Number of Prefixes / Suffixes on Item 1	Count	0 – 3
P2 / S2	Number of Prefixes / Suffixes on Item 2	Count	0 – 3
Total Pool	Combined modifiers of a type (e.g., P1 + P2)	Count	0 – 6
Desired Mods	The specific modifiers you hope to transfer	Count	1 – Total Pool
Resulting Mods	The number of mods on the final item (approximated as the average)	Count	1 – 6

Practical Examples

Example 1: Crafting Spell Suppression Boots

Let’s say you want boots with Tier 1 Spell Suppression and a high Life roll.

• Item 1: Boots with T1 Life (Prefix) and two other junk prefixes. No suffixes. (Inputs: P1=3, S1=0)
• Item 2: Boots with T1 Spell Suppression (Suffix) and two junk suffixes. No prefixes. (Inputs: P2=0, S2=3)
• Goal: Keep the T1 Life and T1 Spell Suppression. (Inputs: Desired Prefixes=1, Desired Suffixes=1)

The poe recombinator calculator would analyze this scenario. The prefix pool is 3, and you want 1 specific prefix. The suffix pool is 3, and you want 1 specific suffix. The calculator will estimate the probability of this specific outcome, guiding your crafting decision. Check out a Path of Exile build guide to see what items are worth combining.

Example 2: Combining Influenced Rings

You want a ring with Curse On Hit (a Warlord suffix) and +1 Maximum Power Charges (a Shaper prefix).

• Item 1 (Warlord Ring): Curse On Hit (Suffix) and 2 junk prefixes. (Inputs: P1=2, S1=1)
• Item 2 (Shaper Ring): +1 Power Charge (Prefix) and 2 junk suffixes. (Inputs: P2=1, S2=2)
• Goal: Keep the Curse and Power Charge mods. (Inputs: Desired Prefixes=1, Desired Suffixes=1)

This is a classic high-stakes recombination. Using the calculator helps you understand if the attempt is worth the high cost of the base items. You can learn more about crafting expensive items in our advanced crafting tutorial.

How to Use This PoE Recombinator Calculator

Using this tool is straightforward. Follow these steps for an accurate estimate:

1. Inspect Your Items: In Path of Exile, hold ‘Alt’ while hovering over your items to see which modifiers are prefixes and which are suffixes.
2. Enter Item 1 Data: Input the number of prefixes and suffixes for your first item into the “Item 1” section.
3. Enter Item 2 Data: Do the same for your second item in the “Item 2” section.
4. Define Your Goal: In the “Desired Outcome” section, enter the total number of unique prefixes and suffixes you hope to have on the final, combined item. For example, if you want one specific prefix from Item 1 and one specific prefix from Item 2, you would enter ‘2’ for Desired Unique Prefixes.
5. Interpret the Results: The calculator will immediately show the estimated probability of success. The table also provides a breakdown of odds based on the number of affixes the final item might have.

Key Factors That Affect Recombinator Outcomes

Several factors influence the outcome of a recombination. While our calculator focuses on the number of mods, you should be aware of these other mechanics:

• Total Mod Count: The more “junk” mods you have on your items, the lower the chance of picking the ones you want. A key strategy is to use items with only the desired mods, if possible.
• Special Modifiers: The game gives a higher weighting to special mods like those from Influence, Essences, or Incursion temples. This means they are more likely to be transferred. Our calculator uses a standard probability model, but your actual odds may be slightly higher if you are transferring special mods.
• Item Level (ilvl): If the recombination process generates a new modifier (instead of transferring one), its tier is determined by the item level of the base item chosen for the result.
• Base Item: One of the two items is chosen as the base for the new item. This determines the sockets, links, and base stats (e.g., Armour, Evasion). You have a 50/50 chance of getting either base.
• Metamods: Modifiers like “Prefixes Cannot Be Changed” are ignored during recombination. Do not waste currency trying to protect mods this way.
• Risk vs. Reward: The fundamental factor is whether the potential reward of a successful combination outweighs the cost of the items you are destroying. A poe recombinator calculator helps quantify this risk. Our currency farming guide can help you acquire the items needed.

Frequently Asked Questions (FAQ)

1. Is this PoE recombinator calculator 100% accurate?

No. It is a statistical model based on community-tested data. The true in-game formula is a black box. This tool provides a highly educated guess to inform your crafting decisions, but it is not a guarantee. Special mod weighting can slightly alter real-world results.

2. What happens to the base item, sockets, and links?

The new item will randomly inherit the base type, sockets, and links from ONE of the two original items (a 50/50 chance for each). You cannot control which one is chosen.

3. Where do I get recombinators in the current league?

Recombinators are not part of the core drop pool. They are sometimes added to leagues as a special reward or can be found in specific content like Tujen’s expedition bargains or as rare global drops during certain league mechanics.

4. Can I combine influenced items from different conquerors?

Yes. This is one of the most powerful uses. You can combine a Shaper item with an Elder item, for example, to create an item with both influences and potentially mods from both pools.

5. Is it better to have empty affix slots or junk mods?

It is always better to have fewer total mods in the pool. An empty slot is better than a junk mod, as it doesn’t dilute the pool of modifiers the game can choose from, increasing the odds of picking your desired mods. For more tips, see our beginners crafting guide.

6. What is the most common use for recombinators?

They are most often used for high-end crafting to combine two very powerful modifiers that cannot normally exist on the same item, such as two different influenced mods or a specific Essence mod with an Influence mod.

7. Does this calculator account for the higher weight of special mods?

This version of the calculator assumes all mods have equal weight. The effect of special mod weighting is difficult to quantify precisely, but it means your actual chances for transferring influenced or essence mods may be slightly higher than what is displayed.

8. What’s the difference between this and a {related_keywords}?

A recombinator calculator focuses on the probability of merging two existing items, while a {related_keywords} is typically used for calculating the cost of achieving certain modifiers from scratch using other currency orbs.