Sourdough Starter Feeding Calculator

Enter starter weight, starter:flour:water ratio, and starter hydration to calculate feed amounts, final starter mass, and resulting hydration.

Starter / seed (g)

Starter ratio

Flour ratio

Water ratio

Existing starter hydration (%)

Quick ratio

—Starter : flour : water by weight

—Flour to add

—Water to add

—Final starter

—Final hydration

Feeding ratios describe starter:flour:water by weight. Peak timing depends on starter health, temperature, flour, and ratio; this calculator does not predict an exact fermentation time.

Connected cooking and baking workflow

v10.87 connects recipe scaling, ingredient-density conversion, baking-pan ratios, oven temperatures, baker percentages, sourdough feeding, yeast substitution and pizza-dough formulation without replacing the established v4.8 kitchen engines.

Prefer weight when repeatability matters

Mass↔volume estimates depend on ingredient density and measuring technique. Pan substitutions can also change bake time and browning even when volume ratios match, while fermentation timing depends on temperature and dough conditions rather than one percentage alone.

How to use this Sourdough Starter Feeding Calculator

Calculate flour and water additions for sourdough feeding ratios such as 1:1:1, 1:2:2, or custom ratios.

Enter, paste, upload, or choose the inputs shown in the tool above.
Adjust the available options for the result you need.
Review the output before copying, downloading, or using it elsewhere.

What this tool does

Enter starter weight, starter:flour:water ratio, and starter hydration to calculate feed amounts, final starter mass, and resulting hydration.

Practical tips and limits

Review the inputs and result before using the output elsewhere. Keep the original data when the operation changes or replaces content.