Bread Dough Calculator
Works backwards from the loaf you want to the dough you must mix and the flour you must weigh, including the baking loss that every other bread calculator quietly leaves out.
Bread Dough Calculator
Results recalculate instantly on every keystroke. Nothing you type is transmitted.
What this result does not account for
- Baking loss varies with oven, steam, bake length and crust colour; the bands are typical rather than exact.
- Tin loading assumes a standard rise; very slack or very stiff doughs sit differently in the tin.
- Does not model fermentation time, which depends on temperature and yeast activity rather than on weights.
- Assumes pieces are divided equally and baked together.
In short: Dough is not the weight of the loaf. Bread loses 10–25% of its weight in the oven and while cooling, so a 900 g finished loaf needs about 1,023 g of dough at a typical 12% tin-loaf loss — and 1,059 g if you bake it as a free-standing hearth loaf at 15%. Only after that correction can flour be recovered, by dividing the dough weight by one plus all the baker’s percentages.
Formula
dough = finished weight ÷ (1 − baking loss)
flour = dough ÷ (1 + hydration + salt + yeast + fat + sugar)
each ingredient = flour × its baker’s percentage
tin loading = dough per piece ÷ tin volume (ml), target 0.33–0.40
[('baking loss', 'Weight lost between mixed dough and cooled loaf, as a fraction. 10–14% tin, 12–15% hearth, ~24% baguette.'), ('1 − loss', 'The yield fraction. Dividing by it is what turns a finished weight back into a dough weight.'), ('1 + Σ%', 'The baker’s-percentage divisor. Every percentage is against flour, so flour is the only unknown.'), ('0.33–0.40 g/ml', 'Dough per millilitre of tin volume for a well-domed loaf.')]
Worked Example
- Start from the loaf, not the flour. Decide the finished weight you want and how many pieces.
- Divide by the yield fraction. Finished weight divided by one minus the loss gives the dough weight.
- Divide again by one plus the percentages. That recovers the flour, and every other ingredient follows from it.
- Check the tin loading. Dough per piece divided by tin volume should land near 0.35 g/ml.
- Weigh the cooled loaf and keep the number. Your measured loss replaces the table for every future bake.
Two 800 g finished tin loaves at a 12% loss need 1,818 g of dough, which at 68% hydration with 2% salt and 1% yeast resolves to 1,063 g of flour, 723 g of water, 21 g of salt and 11 g of yeast. Divide into two 909 g pieces. Bake the same formula as free-standing hearth loaves and the 15% loss pushes the dough requirement to 1,882 g — 64 g more flour and water for the identical finished loaf.
Strengths & Limits Of This Model
Where this engine is strong
- Runs from finished loaf to dough to flour, the direction recipes omit
- Shows the full spread the loss band implies, rather than one figure
- Accepts a measured loss so your own oven replaces the table
- Checks tin loading in grams per millilitre of real capacity
Where it stops
- Needs a measured loss for best accuracy
- Loss bands cannot cover every regional loaf style
- Tin capacity has to be measured with water to be reliable
Practical Use Cases
Filling a tin you already own
Measure its volume in water, load it at 0.35 g per millilitre, and work back to the flour in one step.
Hitting a sale weight or a gift weight
Anyone selling bread has to hit a stated weight after cooling, which is the finished figure, not the dough figure.
Converting a formula between tin and hearth
The same dough loses several more percent baked free-standing, so the dough weight has to rise to hold the loaf size.
Batching rolls to a fixed count and size
Rolls lose 15 to 20% because of their surface area, far more than a loaf, and the piece weight has to allow for it.
Methodology & Editorial Standards
The calculation runs in the direction a baker works: from the finished loaf backwards. Dough weight is the target finished weight divided by one minus the baking loss, and flour is then recovered from the dough weight by dividing by one plus the sum of the baker's percentages, since every percentage in baker's math is expressed against flour. Baking-loss bands are taken from the published ranges and from measured data rather than from a single constant, because no single constant exists: Hamelman identifies loaf weight, crust-to-crumb ratio, bake length and oven temperature as the drivers, and they vary independently. The bands used are 5 to 10% for enriched sweet bakes, 10 to 14% for tin loaves, 12 to 15% for hearth rounds, 14 to 18% for batards, 15 to 20% for rolls and 22 to 26% for baguettes, with the midpoint applied unless the baker supplies a measured figure. These are consistent with Busby's Bakery's weighed results, where a white tin loaf lost 13.7% and a baguette 23.6%. The spread across each band is reported explicitly rather than hidden, because on a 900 g target the difference between the 10% and 15% assumptions is nearly 60 g of dough. Tin loading uses 0.33 to 0.40 g of dough per millilitre of measured tin capacity, the range that produces a domed loaf without overflow.
Computation runs in IEEE-754 double precision at full internal precision; rounding to two decimal places occurs strictly at the display layer, so no cumulative drift enters the result. All monetary outputs use accounting presentation — grouped thousands, two decimals, negatives in parentheses — so figures can be transcribed directly into a model or working paper. Division-by-zero and out-of-domain inputs return an em-dash rather than a misleading number.
This engine was reconciled against an independent reference implementation and hand-verified for the worked example above before release. Our full five-stage review process is published on the About Us page.
Disclaimer. This calculator is provided for informational and modelling purposes only and does not constitute financial, tax, legal, medical, or engineering advice. Verify all figures with a qualified professional before acting on them.
Bread Dough Calculator — 20 Expert FAQs
20 analyst-written answers to the questions practitioners actually ask — optimised for voice and answer-engine retrieval.
How much dough do I need for a 900 g loaf?
About 1,023 g at a typical 12% tin-loaf baking loss, and about 1,059 g if you are baking it free-standing where the loss runs nearer 15%. The arithmetic is the finished weight divided by one minus the loss. The reason the answer is not 900 g is that bread leaves a substantial part of its water in the oven and while it cools, and dough weighed to the target finished weight always produces a loaf that is short.
How much weight does bread lose when baked?
Between about 10 and 25% of the dough weight, and the figure depends almost entirely on how much crust the loaf has for its size. Tin loaves lose 10 to 14% because five sides are shielded, hearth loaves 12 to 15%, rolls 15 to 20%, and baguettes around 24% because they are almost all surface. Cakes and enriched breads lose least, 5 to 10%, since sugar holds water in the crumb.
Does the weight loss all happen in the oven?
No, and this surprises most bakers. Measurements by Busby's Bakery put only about 2 to 4 percentage points of the total on the bake itself. A similar amount evaporates during cooling, when the loaf is still driving steam out of the crumb, and the remainder goes during bulk fermentation and proofing. That is also why slicing a loaf hot makes it stale faster — you release moisture that was still redistributing.
How do I work out flour from a total dough weight?
Divide the dough weight by one plus all the baker's percentages as decimals. For 1,000 g of dough at 65% hydration, 2% salt and 1% yeast, the divisor is 1.68 and the flour is 595 g. It works because every percentage in baker's math refers to the flour weight, so flour is the only unknown in the identity. It is the same inversion used to size pizza dough from a ball weight.
How much dough goes in a 9x5 loaf tin?
About 700 to 900 g, with 774 g being the middle of the range. A 9 by 5 by 3 inch tin holds roughly 2,212 ml, and loaf tins are loaded at 0.33 to 0.40 g of dough per millilitre of capacity. Below 0.33 the loaf will not reach the rim; above 0.40 it mushrooms over the sides. Tins vary more than their nominal sizes suggest, so measure yours with water.
How do I measure my own baking loss?
Weigh the dough piece just before it goes in the oven, then weigh the loaf again once it is completely cool — not warm, because it is still losing moisture. Divide the difference by the dough weight. Do it twice on the same formula and you will have a figure that is worth more than any published table, because it already contains your oven, your tin, your steam and your bake length.
Why do my loaves come out lighter than the recipe says?
Almost always because the recipe quotes a dough weight and you are weighing the baked loaf, or the reverse. The two differ by the baking loss, which for a tin loaf is around an eighth of the weight. The other common cause is baking longer or hotter than the recipe intends, since both drive off more water. A darker crust and a lighter loaf are the same phenomenon.
Does hydration change the baking loss?
Yes, though less than you might expect, because the extra water largely leaves during the bake. A wetter dough starts heavier for the same flour and loses proportionally more, so the finished loaf lands closer to the drier version than the mixing weights suggest. Bake length matters more: the same dough held ten minutes longer for a darker crust will lose several additional percentage points.
What is a baker's dozen and what does it have to do with this?
It is thirteen for the price of twelve, one extra in twelve, which is 8.33%. Medieval bakers faced severe penalties for selling underweight bread and could not predict evaporation precisely, so they added a loaf to every dozen as insurance. It is the same problem this calculation solves arithmetically: the gap between what you mix and what the customer weighs.
Should I scale dough pieces by weight or by eye?
By weight, always. A 5% variation between pieces is easy to produce by eye and it is visible in the finished loaves, because the smaller piece bakes faster, colours sooner and rises less. Professional bakers scale to within about 1%. It costs a few seconds per piece and it is the single most reliable improvement available to a home baker.
Is this bread dough calculator free to use?
Yes. It is free, requires no account, and has no usage limits. ApexConverter is funded by contextual advertising, never by selling user data.
Is my data sent to a server?
No. The engine runs as Vanilla JavaScript inside your browser under our Zero-Server Client-Side Execution model. Your figures are computed locally and are never transmitted, logged, or stored.
How accurate is this calculator?
It applies the standard closed-form formula in IEEE-754 double precision, rounding only at the display layer. The engine is reconciled against an independent reference implementation before release.
Does it work on mobile?
Yes. The interface is mobile-first with numeric keypad hints and is tested down to a 320-pixel viewport with no horizontal scrolling.
Can I use it offline?
Largely, yes. Because computation is client-side, the page continues to calculate without a network connection once it has loaded.
Which currency does it use?
Amounts display in US$ accounting format, but the underlying mathematics is currency-agnostic. The result is identical in any currency, so simply read the figures in your own.
Why does a result show an em-dash?
An em-dash indicates the calculation is not defined for the inputs given — typically a division by zero or a value outside the valid domain. We show a dash rather than a misleading number.
How do I report an error?
Email apexconverter.praxiscalc@gmail.com with the tool URL, your exact inputs, the output received and the output you expected. Verified mathematical errors are patched within 72 hours.
Where can I find related bread dough calculator tools? (1)
Use the Related Engines panel on this page, or open the category hub for all 50 tools.
Where can I find related bread dough calculator tools? (2)
Use the Related Engines panel on this page, or open the category hub for all 50 tools.