Batch Scaling Calculator
Scale any recipe up or down by a multiplier, or by entering your original and target yield. Tag yeast to see a large-batch suggestion alongside the plain linear number; everything else, salt included, scales in a straight line. The method and its limits are explained below the calculator.
Multiplier: 2.00x
| Ingredient | Original | Type | Linear scale | |
|---|---|---|---|---|
| 2000.0 | ||||
| 14.0 | ||||
| 40.0 |
How it works
The multiplier is either the number you type or the target yield divided by the original yield (12 rolls to 30 rolls is 30 ÷ 12 = 2.5). Every ingredient is multiplied by it. This is the same as scaling by baker's percentages: the proportions do not change, only the batch size.
Ingredients tagged as yeast get a second, adjusted figure once the multiplier is above 2x: the full linear amount up to 3x, about 90% of it above 3x. The reason usually given is that a big mass of dough holds its heat and ferments faster, so a straight multiply can over-proof it. This is a published rule of thumb rather than a measured standard, and controlling dough temperature with the Dough Temperature Calculator does more for consistent fermentation than any yeast correction.
Ingredients tagged as salt are shown at the full linear amount. Earlier versions of this page suggested cutting salt by about 15% in large batches; we could not find a reliable bread source for that, while professional formulas keep salt at the same baker's percentage at every batch size, so the suggestion was removed on 2026-10-25.
Worked example
A bread recipe with 500 g flour, 10 g salt and 7 g yeast, scaled 4x.
Linear scaling gives 2,000 g flour, 40 g salt and 28 g yeast. With the large-batch adjustment, yeast is suggested at about 90% of linear (25.2 g). Salt stays at 40 g: it is 2% of the flour in the original and should still be 2% in the big batch.
At 2x or less the adjustment is not shown — straight multiplication is a fine starting point there.
Common mistakes
- Scaling baking time with the batch. Time depends on the size of each piece and the oven load, not on how many pieces you make.
- Overfilling the mixer. Check the mixer's rated dough capacity before multiplying a recipe; an overloaded mixer heats the dough and kneads it poorly.
- Rounding eggs, yeast and leavening too freely. When a multiplier gives fractions of an egg, beat the eggs and weigh the amount you need.
- Scaling a cake recipe to a different pan without checking the pan area. See the scaling and pan-size guide.
When not to rely on it
For large production batches, especially above 5x, treat any scaled yeast figure as a first test. Measure the dough temperature and proof time on the first batch and adjust from there.
Chemical leaveners in cakes depend on pan depth and size as well as quantity, so a cake that is scaled and baked in a much deeper pan may need its own recipe rather than a multiplied one.
Frequently asked questions
Can I just multiply every ingredient?
Yes, as a starting point. Yeast is the one many bakers trim in large batches, because a big mass of dough holds its heat and ferments faster. Salt is not reduced: a bread formula keeps the same salt percentage at any batch size.
How much should I reduce yeast in a large batch?
Sources vary. A common guideline keeps yeast linear up to about 3x and cuts it to roughly 90% above that; some suggest more. Treat it as a starting point and adjust after a test bake.
Do I scale baking time and temperature too?
Temperature usually stays the same. Time depends on the size of each piece, not the batch: a bigger loaf needs longer, but more loaves of the same size do not.
How do I scale by yield instead of a multiplier?
Divide the target yield by the original yield. Going from 12 rolls to 30 rolls is a 2.5x multiplier.
Why did the salt adjustment disappear?
It was a cooking rule of thumb with no reliable bread source behind it. Bread formulas keep salt at a fixed percentage of the flour (around 2% in many lean breads), whatever the batch size.
Is scaling by baker's percentage better than multiplying?
They give the same result. Baker's percentages are handier when you want a specific dough weight, or when you only have part of the flour you need.
Read the guide
Sources
- King Arthur Baking — Baker's percentage (pro reference) — scaling with a formula conversion factor; salt stays at its percentage
- King Arthur Baking — Dough temperature (pro reference) — consistent dough temperature for consistent fermentation
Last reviewed: 2026-10-25. Found an error? Email contact@bakerymath.com.
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