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
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Autoscaling enabled? Breww multiplies all recipe quantities by the batch size ÷ recipe size.
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Multi-turn batch with “repeat per turn” stage? The scaled amount is divided by the number of turns.
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Stage marked “once per batch”? The full scaled amount is applied once, regardless of number of turns.
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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.
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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:
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:
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Recipe: 1,000L with 100kg of malt
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Planned batch: 2,000L
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Scaling factor: 2
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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:
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Recipe: 100kg of malt
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Planned batch: 2,000L with 2 turns
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Scaling factor: 2 → total 200kg
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Stage set to repeat per turn: 200kg ÷ 2 turns = 100kg per turn
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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:
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Repeat per turn — for actions done in every brew cycle (e.g. mash additions)
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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:
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Recipe batch size: 1,000L with 100kg of malt
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Planned batch: 2,000L with 2 turns
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Autoscaling: off
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Stage: marked as repeat per turn
Result:
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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:
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Recipe batch size
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Ingredient quantity in the recipe
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Planned batch volume
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Whether autoscaling was enabled when starting the batch
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Whether the stage is marked repeat per turn or once per batch
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Number of turns in the batch
Then do the maths:
- Multiply recipe quantity by the scaling factor (if autoscaling is on)
- Divide by number of turns if the stage is repeat per turn
- 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:
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The recipe name
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The batch number
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What you expected vs. what you're seeing
