Free calculators for better baking

Fast, accurate answers to the math questions every baker hits — hydration, percentages, pan sizes, and scaling. No sign-up, nothing to install.

• Sourdough Hydration Calculator

  Your dough's true hydration — including the flour and water hiding in your starter.

• Baker's Percentage Calculator

  Turn any recipe into a professional baker's formula you can scale and compare.

• Cake Pan Size Converter

  The recipe says 9-inch, you own 8-inch. One multiplier fixes every ingredient.

• Recipe Scaler

  Halve it, double it, or go from 4 servings to 7 — exact amounts, instantly.

• Starter Feeding Calculator

  Any feeding ratio, exact flour and water amounts — or work back from what your recipe needs.

• Yeast Conversion Calculator

  Instant, active dry, or fresh — swap any yeast for the one in your fridge.

• Butter Conversion Calculator

  Sticks, cups, tablespoons, or grams — American and metric butter, translated.

Why baking math matters

Cooking forgives improvisation; baking doesn't. Bread is chemistry — a few percentage points of hydration decide whether your dough is shapeable or a sticky puddle, and a pan two inches wider needs half again as much batter, not "a little extra." These calculators exist so you can get the numbers right in seconds and spend your attention on technique instead of arithmetic.

Everything here runs instantly in your browser. Your recipes never leave your device.