# Troubleshooting unexpected ingredient quantities in batches

If the ingredient amounts on your brew sheet don’t match what you expected, it’s usually due to how Breww handles **batch scaling** and **multi-turn logic** when starting a batch. Breww doesn’t change your recipe — but how that recipe is interpreted depends on a few key settings.

This guide will help you work out why a quantity might appear incorrect and how to verify what's actually happening.

### TL;DR – Quick Checks for Ingredient Quantity Issues

* **Autoscaling enabled?**
  Breww multiplies all recipe quantities by the batch size ÷ recipe size.

* **Multi-turn batch with “repeat per turn” stage?**
  The scaled amount is divided by the number of turns.

* **Stage marked “once per batch”?**
  The full scaled amount is applied once, regardless of number of turns.

* **Autoscaling disabled, but batch size is larger or smaller than the recipe, and multi-turn is on?**
  Ingredient quantities are not scaled — and repeat-per-turn stages will divide the original (unscaled) amount, which may result in lower or higher-than-expected values.

* **Check stage settings in the recipe**
  Stage settings (repeat vs once per batch) affect how ingredients are distributed in multi-turn batches.

### 1. Was autoscaling turned on?

If autoscaling is enabled, Breww calculates a **scaling factor**:

> **Note:**
> **Planned batch volume ÷ Recipe batch volume**

All ingredient quantities are then multiplied by this factor. Scaling can increase or decrease amounts depending on the batch size, and doesn’t need to be a round number.

**Example:**

* Recipe: 1,000L with 100kg of malt

* Planned batch: 2,000L

* Scaling factor: 2

* Result: 200kg of malt on the brew sheet

  Check the **brew sheet** — if ingredient quantities are proportionally larger or smaller than in the recipe, autoscaling was likely applied.

### 2. Is the batch multi-turn? And is the stage set to “Repeat per turn”?

If your batch is brewed over multiple turns and the stage is marked **repeat per turn**, Breww divides the (already scaled) ingredient quantity by the number of turns and applies that amount per turn.

If the stage is set to **once per batch**, Breww uses the full scaled quantity across all turns.

**Example:**

* Recipe: 100kg of malt

* Planned batch: 2,000L with 2 turns

* Scaling factor: 2 → total 200kg

* Stage set to **repeat per turn**: 200kg ÷ 2 turns = **100kg per turn**

* Stage set to **once per batch**: 200kg added once during the batch

### 3. Are the stage settings correct in the recipe?

Each stage in your recipe is marked either:

* **Repeat per turn** — for actions done in every brew cycle (e.g. mash additions)

* **Once per batch** — for actions done once to the full volume (e.g. fermentation additions)

  This setting controls **how ingredient quantities are applied** in multi-turn batches. If the wrong option is selected, you may see ingredients added too many times — or not enough.

  **Reminder:** This is a setting on the stage itself, not on individual ingredients.

### 4. Was autoscaling off on a multi-turn batch?

This is a common gotcha. If autoscaling is **not** enabled, but the batch has **multiple turns**, Breww still applies repeat-per-turn logic — but uses the **original recipe quantities** without scaling them up.

This can cause ingredients to appear **lower than expected per turn** if the batch size is larger than the recipe.

**Example:**

* Recipe batch size: 1,000L with 100kg of malt

* Planned batch: 2,000L with 2 turns

* Autoscaling: **off**

* Stage: marked as repeat per turn

  **Result:**

* 100kg ÷ 2 = **50kg per turn**, even though the batch is double the recipe

  To ensure ingredient amounts scale with batch size, **autoscaling must be enabled**.

### 5. Quick symptom checker

| Symptom                                            | Likely cause                                        |
| -------------------------------------------------- | --------------------------------------------------- |
| Ingredient appears smaller than expected per turn  | Autoscaled, and stage is marked **repeat per turn** |
| Ingredient appears larger than expected            | Autoscaled, and stage is **once per batch**         |
| Ingredient didn’t scale with batch size            | Autoscaling was **disabled**                        |
| Ingredient applied on every turn, but shouldn’t be | Stage is incorrectly marked **repeat per turn**     |
| Ingredient seems too low overall in a larger batch | Autoscaling was off, and stage is repeat per turn   |

### 6. Still not sure? Check these:

* **Recipe batch size**

* **Ingredient quantity in the recipe**

* **Planned batch volume**

* **Whether autoscaling was enabled when starting the batch**

* **Whether the stage is marked repeat per turn or once per batch**

* **Number of turns in the batch**

  Then do the maths:

1. Multiply recipe quantity by the scaling factor (if autoscaling is on)
2. Divide by number of turns if the stage is repeat per turn
3. Compare to the brew sheet

### Still need help?

If you're still not sure what's going on, please contact the support team and let us know the following:

* The recipe name

* The batch number

* What you expected vs. what you're seeing