Calculate salt as a percentage of total flour, including starter flour. Use the recipe’s intended salt level and check the weight on a suitable scale.
- Keep the flour denominator consistent.
- Volume measures vary with salt crystal size.
- A salt change can affect more than flavor.
Calculate salt against total flour
Salt percentage in a bread formula is salt weight divided by total flour weight, multiplied by 100. For a dough containing 600 g total flour and 12 g salt, the calculation is 12 ÷ 600 × 100 = 2%. Total flour includes the flour inside the sourdough starter as well as the flour weighed directly into the mixing bowl.
King Arthur Baking’s professional salt reference describes 1.8% to 2% of flour weight as a general bread-dough range. That is a useful reference point, not a requirement that every bread style use an identical amount. This guide focuses on ingredient calculations and mixing records. The worked examples explain the mathematics and should not be read as claims from a personal baking trial.
Salt has more than one role
King Arthur Baking identifies flavor, gluten strengthening, and fermentation control among salt’s roles in bread. Consequently, changing the amount can influence more than the perceived saltiness of a finished loaf. A change that looks small in grams may still matter when compared with the amount of flour in a small batch.
Treat salt as a deliberate formula ingredient rather than a last-minute garnish in the dough. If you want to compare two levels, keep the remaining ingredients and process as consistent as practicable, then record what was actually done. A calculator can establish the difference in composition, but it cannot predict the exact flavor, rise, or handling result of every flour and fermentation method.
Include starter flour in the denominator
Suppose the mixing list contains 540 g fresh flour and 120 g starter at 100% hydration. That starter supplies 60 g flour, so the dough contains 600 g total flour. At 2%, the required salt is 12 g. Calculating against fresh flour alone would produce 10.8 g, which is actually 1.8% of the total flour.
The difference is not necessarily disastrous, but it changes what the formula says. A notebook labeled 2% salt should mean 2% of its stated flour reference. If a source recipe intentionally uses fresh flour as the denominator, preserve that convention in your transcription and explain it. For comparisons on this site, total flour is the consistent reference, including all flour that enters through starter or levain.
A stiff starter changes the flour contribution
A 120 g starter at 50% hydration contains 80 g flour and 40 g water. Combined with 540 g fresh flour, it produces 620 g total flour, so 2% salt is 12.4 g. The same weight of 100% hydration starter would have supplied only 60 g flour, requiring 12 g salt for the same percentage.
This demonstrates why a salt calculator that includes starter needs its hydration as well as its mass. Starter flour is starter mass divided by one plus the hydration expressed as a decimal. If that hydration is unknown, a salt percentage can only be estimated. A visual description such as thick or runny is not a reliable substitute for a documented flour-water ratio.
Convert a chosen percentage into grams
Salt grams = total flour grams × salt percentage ÷ 100. For 750 g flour, 1.8% gives 13.5 g, 2% gives 15 g, and 2.2% gives 16.5 g. These are arithmetic comparisons, not a recommendation to increase or decrease a particular recipe without considering its intended style and method.
A convenient mental check is that 1% equals 1 g for every 100 g flour. Therefore, a 500 g flour dough needs 5 g for each percentage point; 2% is 10 g. With 1,000 g flour, each percentage point is 10 g. If your calculated salt looks several times larger than expected, check whether you entered 2 as a multiplier instead of converting 2% to 0.02.
| Total flour | Salt at 1.8% | Salt at 2% | Salt at 2.2% |
|---|---|---|---|
| 500 g | 9 g | 10 g | 11 g |
| 600 g | 10.8 g | 12 g | 13.2 g |
| 750 g | 13.5 g | 15 g | 16.5 g |
| 1,000 g | 18 g | 20 g | 22 g |
Flour percentage is different from dough percentage
In a lean formula containing 600 g flour, 432 g water, and 12 g salt, mixed dough weighs 1,044 g. Salt is 2% of flour but approximately 1.15% of the whole dough. Both statements are mathematically correct because they use different denominators. Bread formulas generally use the flour-based statement.
This distinction matters when comparing a recipe with a spreadsheet that expresses every ingredient as a share of the total batch. Convert to a common denominator before drawing conclusions. A percentage without its reference is incomplete information. The same rule applies to starter mass percentage, prefermented flour percentage, and the percentage of any additions: first identify what quantity is being treated as 100%.
Weigh salt instead of assuming spoon equivalence
Different crystal shapes occupy a measuring spoon differently, so a volume substitution does not necessarily preserve the salt weight. Weighing the amount specified by the formula avoids that particular ambiguity. Use the same unit as the flour calculation and tare the container before adding salt.
For a small batch, check whether your scale can resolve the quantity you need. A formula calling for 2.4 g salt cannot be recorded as measured to a tenth of a gram on a scale that reads only whole grams. You may choose an appropriate finer-resolution scale, use a larger batch, or accept and document the rounding. The correct choice is the one that keeps the measurement honest and practical for the intended bake.
Keep salt-mixing water inside the water allowance
Some methods dissolve or disperse salt in water reserved from the main mix. That water still belongs in total hydration. If a 600 g flour dough is planned at 72%, its total water allowance is 432 g. Using 20 g of that allowance with the salt leaves 412 g for the other water-containing parts of the formula.
If 120 g of 100% starter already supplies 60 g water, fresh water totals 372 g. You could add 352 g during the first mix and reserve 20 g for the salt step. Adding an unrecorded extra 20 g instead would raise total water to 452 g, or about 75.33% hydration. The salt percentage would stay unchanged, but the dough composition would not.
Understand a salt solution before using its weight
A solution’s mass is not all salt. As a bookkeeping example, a mixture containing 10 g salt and 40 g water weighs 50 g and is 20% salt by total solution weight. If all 50 g enters dough, record 10 g salt and 40 g water, not 50 g salt or 50 g water.
If only half that thoroughly mixed solution is used, it contributes 5 g salt and 20 g water. This is mixture arithmetic, not a suggestion that every recipe should use a salt solution. The example illustrates a wider rule: mixed ingredients must be broken into relevant components when their composition affects the calculation. Keep solution percentage, baker’s percentage, and dough hydration separately labeled.
Scale salt with the other ingredients
When resizing a recipe, multiply salt by the same factor as flour, water, and starter. A dough using 10 g salt becomes 15 g at one-and-a-half times the original size. Leaving salt unchanged while increasing every other ingredient would reduce its flour-based percentage.
Check the final rounded list after scaling. If a tiny batch mathematically needs 3.3 g salt and you round to 3 g, write down the achieved percentage rather than preserving the original target label without qualification. Rounding has a larger proportional effect on small quantities. The goal is not unnecessary decimal precision; it is knowing whether a change came from a deliberate formula decision or the limits of a measurement.
Check salt already present in other ingredients
Salted additions can contribute salt beyond the amount weighed separately. However, ingredients such as cheese, olives, seasoned seeds, or salted butter vary in composition and may bring water and other solids as well. A basic lean-dough calculator cannot infer their contribution from the ingredient name alone.
If you want a fuller composition estimate, use suitable product information and state the assumptions. Keep the separately added dough salt visible even when you also track estimated salt from inclusions. Avoid assuming that removing an equal mass of dough salt will make every inclusion-rich recipe behave like the original lean dough. Distribution, water content, and the recipe’s intended taste and texture also differ.
If you discover salt was omitted
First establish what actually happened. A preweighed container still on the counter is stronger evidence than a vague impression that the dough feels different. King Arthur Baking’s discussion of forgotten salt distinguishes an omission noticed soon after mixing from one discovered after the dough has already risen; correcting late in the process can disturb its developed structure.
Use that source or the original recipe’s guidance for a method appropriate to the stage, and include any added mixing water in your record. Do not treat a formula calculation as a guarantee that an already developed dough can be restored to its intended condition. For future batches, a short ingredient check before fermentation begins is often more useful than relying on memory after several mixing steps.
What an oversalted calculation actually tells you
If 15 g salt was added to a dough with 500 g total flour, the formula is at 3%. To make that salt amount equal 2%, total flour would need to reach 750 g. At 72% hydration, total water would need to be 540 g. Compared with the original 500 g flour and 360 g water, the mathematical additions are 250 g flour and 180 g water.
Preserving 10% prefermented flour would also require raising prefermented flour from 50 g to 75 g. A further 50 g of 100% starter could supply 25 g flour and 25 g water, leaving 225 g fresh flour and 155 g fresh water to add. This is a consistency calculation, not a reliable rescue procedure: adding and developing so much material late changes the process and batch size substantially.
Make the next comparison useful
A compact salt record needs total flour, starter mass and hydration, salt grams, calculated salt percentage, any salt-containing additions, and any water used to incorporate the salt. Add the stage at which salt entered the dough if you are comparing methods. Those details make a future adjustment traceable.
Keep flavor observations separate from calculated quantities. A loaf tasting different does not by itself prove the salt measurement changed; fermentation, flour, and other ingredients also affect the result. Begin with a clear recipe, verify the flour denominator, weigh the salt, and preserve the actual mixing list. Then any intentional change has a defined starting point and a numerical meaning you can explain.
Sources & further reading
This guide combines published references with our own explanations and decision aids. Numerical examples are illustrative; they are not records of Sourdough Bench test bakes.
Put it into practice.
Keep the recipe, observations and next change together in your downloadable bake log. For a symptom-led starting point, use the loaf troubleshooting guide.