Sourdough Calculator & Journal

How much water does my sourdough need? BreadMath is the bread baking calculator that does the math for you. Baker's percentages, dough hydration, sourdough starter feedings, bake timeline, recipe scaling, and a photo journal of every loaf — all in one app.

BAKER'S PERCENTAGE CALCULATOR

Enter any flour, water, salt, and starter or yeast amounts. BreadMath shows live baker's percentages for every ingredient. Add multiple flour types — bread flour, whole wheat, rye, spelt, 00 flour — in a single recipe. Salt percentage and hydration update instantly. Save any calculation as a recipe in one tap.

DOUGH HYDRATION CALCULATOR

The fastest way to find your bread's hydration. Enter flour, water, and starter (with starter hydration) — BreadMath does the maths. Target hydration ranges shown for every common bread style: sandwich loaf, country boule, ciabatta, focaccia, baguette, bagels. Includes water from your starter so the number is correct.

SOURDOUGH STARTER MANAGER

Track your starter health, feeding ratio, and ambient temperature. Tap the build calculator to find exactly how much starter to feed for any recipe. One-tap "I just fed it" log with ratio (1:1:1, 1:2:2, 1:3:3, 1:5:5) and the next-feeding time. Full feeding history at a glance.

FEEDING SCHEDULE & REMINDERS

Never forget your starter again. Reliable local notifications for every feeding interval — every 4, 6, 8, 12, or 24 hours. Pause when the starter goes in the fridge, resume when it comes back out. The dashboard shows the next feeding countdown so you can plan around it.

BAKE TIMELINE PLANNER

Plan a sourdough bake forwards from now or backwards from a target finish time. Autolyse, mix, bulk ferment, pre-shape, final shape, cold proof, bake — every step with its own timer. One-tap "start next step" advances through the bake automatically. Perfect for fitting a 24-hour cold proof around your day.

RECIPE SCALER

Halve, double, or scale any recipe to a target dough weight or number of loaves. Maintains every baker's percentage exactly. No more pencil-and-paper calculations.

16 BUILT-IN RECIPES WITH REAL PHOTOS

Basic Sourdough, Whole Wheat Sourdough, Country Rye, Sourdough Baguette, Ciabatta, Focaccia, Multigrain, Soft Sandwich Bread, Honey Whole Wheat, Brioche, Sesame Bagels, Soft Pretzels, Neapolitan Pizza, Naan, Flour Tortillas, Cinnamon Rolls. Every recipe has full ingredient table with baker's percentages, scaled to 500 g flour, plus 5–7 step instructions with times and temperatures.

PHOTO BAKE JOURNAL

Log every loaf with photos, stars, notes, recipe link, and tags. Use the presets (open crumb, crisp crust, rye, whole wheat, weekend bake) or add custom tags. Edit any bake later — you're not locked in. Sort by newest, oldest, or top-rated. Forgot a photo? The journal uses the linked recipe's image so the entry still looks great.

WORKS OFFLINE — NO ACCOUNT, NO TRACKING

Every calculation, recipe, and photo lives on your device. No sign-up, no cloud, no account, no tracking. The whole app loads instantly — no spinners between screens.

PHONE AND TABLET

Tablet layout switches to a 3-column recipe and journal grid so you see more bakes at once. Big tap targets for flour-dusted fingers. Metric grams or imperial ounces — switch any time.

BREADMATH PRO — $4.99 ONE-TIME PURCHASE

Unlock the full bread journal with unlimited entries and photos, the bake timeline planner, feeding schedule notifications, the full 16-recipe library, recipe scaling, and ad-free experience. The free version includes the baker's percentage calculator, hydration calculator, starter tracker, and 3 starter recipes — enough to get the math right on your next loaf.

The bread baking app made by bakers, for bakers. Download BreadMath today and get the math out of the way.