Sourdough Calculator

Calculate starter feeding ratios, bread dough formulas, and hydration percentages. Baker's math made simple for perfect sourdough every time.

Sourdough Starter Feeding

Feeding Amounts

Sourdough Starter Feeding

100g

Flour

100g

Water

250g

Total

1:2:2 ratio — 50g starter + 100g flour + 100g water

💡 Tip: Keep at least 20-30g of starter as a backup before feeding. If you need more starter for baking, just increase the feeding amounts.

Sourdough Baking Tips

Use a digital scale

Sourdough is all about ratios. A scale is essential — volume measurements are too inconsistent for reliable results.

Feed before baking

Use starter at its peak (when it's doubled and bubbly). Feed it 1:2:2 about 4-6 hours before you plan to mix dough.

Autolyse first

Mix flour and water, let rest 20-60 minutes before adding salt and starter. This develops gluten with less kneading.

Watch the dough, not the clock

Rising times vary with temperature. Let the dough double (or reach 50% increase) regardless of how long it takes.

More Sourdough Resources

Sourdough Starter Feeding Ratios Guide →

Learn what 1:1:1 means, how to adjust for your schedule, and troubleshoot common starter problems.

Dough Hydration Calculator →

More detailed hydration calculations with baker's percentage breakdowns for all dough types.

Sourdough Baking Essentials

As an Amazon Associate we earn from qualifying purchases.

Banneton Proofing Basket (Set of 2)

~$20

Rattan basket for shaping and proofing sourdough boules.

Shop on Amazon

Lodge Enameled Dutch Oven

~$80

The classic vessel for baking crusty sourdough loaves.

Shop on Amazon

Bench Scraper & Lame Set

~$15

Scoring blade and scraper for clean dough handling.

Shop on Amazon