Researched sourdough guides
Sourdough, worked out.
Clear guides to sourdough timing and baker's math, with the published source behind every number linked on the page, plus free calculators that do the arithmetic for you.
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- Free calculators
Start here
New to sourdough? Follow these three guides in order.
- Make and feed a starterA day-by-day plan and feeding ratios that fit your schedule.
- Learn baker's percentagesRead any recipe as percentages and scale a loaf.
- Bake your first weekend loafFeed Friday, mix Saturday, bake Sunday, with a free printable.
Guides
Each guide compares published sources and links every one of them at the end of the page.
GuideSourdough Starter: How to Make It, Feed It, and Fix It
Make one from scratch, choose a feeding ratio, and fix a starter that won't rise.
GuideSourdough Bulk Fermentation: How Long It Takes at Every Temperature
Published bulk times compared by dough temperature, signs it's done, and a mixing-water calculator.
GuideOvernight and Same-Day Sourdough: Pick a Schedule That Fits Your Day
Four ways to use the night, three full timelines, and how long dough can wait in the fridge.
GuideA Weekend Sourdough Schedule You Can Print
Feed Friday, mix Saturday, bake Sunday, with a free printable and starter log.
GuideSourdough Discard: Use It in Any Recipe, Store It Safely, Make Less of It
Swap discard into any recipe, see how long it keeps (sources compared), and make less of it.
GuideSourdough Focaccia: Five Recipes Compared, and How Much Dough Your Pan Needs
Five focaccia formulas in baker's percentages, how much dough your pan needs, and fixes for sticking.
GuideSourdough Sandwich Bread: Five Recipes Compared, From Lean to Enriched
Lean and soft enriched loaves compared, dough weight per loaf pan, and why doneness temps differ.
GuideSourdough Pizza Dough: Five Recipes Compared by the Numbers
Five pizza doughs in baker's percentages, ball weight by pizza size, fridge timelines and home-oven fixes.
GuideSourdough Bagels: Five Recipes Compared by the Numbers
Five bagel doughs in baker's percentages, dough per bagel, boil times, oven temps and one-day or three-day schedules.
GuideWhole Wheat Sourdough: Five Recipes Compared by the Numbers
Five whole wheat loaves in baker's percentages: how much water, how whole, schedules, bake temps and fixes for dense crumb.
GuideSourdough Rye Bread: Four Recipes Compared by the Numbers
Four rye loaves from 30% to 100% rye in baker's percentages: water, starter, warm short rises, bake temps and why rye needs acid.
GuideBaker's Percentages and Hydration, Explained (with a Calculator)
Read any recipe as percentages, count the water in your starter, and scale a loaf.
Free calculators
Small tools that run in your browser and are unit-tested against published worked examples.
CalculatorSourdough Hydration Calculator (Baker's Percentage)
Free baker's percentage calculator: enter dough weight or flour weight, hydration, salt and starter, and get grams with the starter's flour and water counted.
CalculatorSourdough Discard Swap Calculator (Any Hydration)
Work out how much flour and liquid to take out of a recipe when you add sourdough discard, for a starter at any hydration.
CalculatorMixing Water Temperature Calculator for Sourdough
Find the water temperature that gets your sourdough to its target dough temperature, using the desired dough temperature formula. Works in °F or °C.
The Sourdough Schedule Pack
A 7-page printable PDF: weekend, weekday-overnight and same-day timelines with Planned and Actual columns, a baker's-math recipe sheet, and starter and bake logs.
Bakers Percent is a small, independent site. Read how these guides are researched.