How Much Salt in Sourdough? Salt Percentage Explained

The number

King Arthur Baking's professional reference on salt says the correct amount in bread dough is generally 1.8 to 2% of the flour weight. In grams:

For sourdough, base it on total flour including the flour in your starter. The baker's percentage calculator does this automatically and warns if salt runs above the range.

What salt does

The same reference lists several jobs:

• Flavor. Bread without salt tastes flat. Too much is unpalatable. Salt enhances the flavor of well-fermented flour but doesn't replace it.
• Gluten strength. Salt tightens the gluten structure so the dough holds the gas from fermentation. Without it, dough is slack and sticky, hard to work, and the loaf has poor volume.
• Fermentation control. Salt draws water from yeast cells by osmosis and slows fermentation. Too much retards yeast so much that volume drops; none lets the dough ferment too fast.
• Crust color. By slowing fermentation, salt leaves more residual sugar at baking time, which browns the crust. Salt-free bread has a pale crust.
• Flour color and aroma. Salt delays dough oxidation during mixing, helping preserve the natural carotenoid pigments that give unbleached flour its creamy color and wheaty aroma.

When to add it

The reference prefers adding salt at the start of mixing so it can protect those pigments throughout. Many home sourdough methods mix flour and water first, rest the dough (autolyse), then add salt with a little reserved water. Both work; if you add salt later, make sure it's fully dissolved and worked in so there are no salty pockets.

Salt in the levain

Professional bakers sometimes add a small amount of salt, 0.2–0.3%, to a levain in warm, humid months to slow the culture and keep it from over-maturing. It's a niche technique, but useful if your starter races ahead in summer. Count that salt in the dough's total.

Weigh, don't spoon

Salts differ hugely by volume: a teaspoon of fine table salt weighs much more than a teaspoon of flaky salt. Weighing removes the problem. A scale with 0.1 g resolution is ideal for small batches, because 1 g of salt is a big share of 10 g.

Sodium and health

A slice of bread contributes sodium to your diet. The FDA's sodium guidance explains how to read the Nutrition Facts label and recommends that most people keep sodium in check. If you need to cut back, lowering salt toward the bottom of the range and keeping fermentation flavorful is a reasonable start; for medical sodium limits, follow professional advice.

Troubleshooting

• Flat-tasting bread: check salt percentage first, then fermentation.
• Slack, sticky dough that won't hold shape: forgotten or low salt is a common cause, alongside high hydration.
• Dense loaf that barely rose: too much salt is one possibility; so is an under-active starter or a cold dough.
• Pale crust: low salt, over-fermentation or a cool oven.

Worked example with starter

A dough with 450 g flour, 340 g water, 100 g starter at 100% hydration and 10 g salt has 500 g total flour (450 + 50 from the starter). Salt is 10 ÷ 500 = 2.0%, right at the top of the range. If you based it only on the 450 g you added, it would look like 2.2%, which is why counting the starter's flour matters. Check any recipe this way with the hydration calculator, which reports salt as a percentage of total flour.

Salt and timing

Because salt slows fermentation, a dough with less salt will usually move faster and one with more will move slower. If you change the salt in a familiar recipe, watch the dough rather than the clock for the first few bakes.

Common questions

How much salt for 500 g of flour?

At 1.8–2%, 9 to 10 g. If your starter adds 50 g of flour, base it on 550 g: about 10 to 11 g.

Can I reduce salt in bread?

You can, but expect blander flavor, a slacker dough and faster fermentation. If you need to limit sodium for health reasons, follow your doctor's or dietitian's advice.

Does the type of salt matter?

By weight, salts are similar in sodium chloride. By volume they differ a lot, because flaky and coarse salts take up more space. Weigh salt rather than measuring it with spoons.

When should I add the salt?

The professional reference prefers adding salt at the beginning of mixing, partly because it helps protect flour pigments from over-oxidation. Many sourdough methods add it after a rest (autolyse), which is also common.