KitchenFree kitchen calculators
Bake it right the first time.
Scale recipes, convert cups to grams, nail your bread dough and brew better coffee. Precise answers in seconds, made for your phone at the counter.
The toolbox
Kitchen calculators
Ten tools that handle the maths, so you can handle the cooking.
Recipe Scaler
Paste a recipe, change the servings, and every ingredient is resized, with fractions like 1 1/2 and ¾ handled for you.
Cups to Grams
Accurate weights for 20 common ingredients.
Bread Hydration
Baker's percentages with your starter counted in.
Yeast Converter
Swap fresh, active dry and instant yeast.
Oven Temperature
°F, °C, fan oven and gas mark.
Cake Pan Converter
Bake any recipe in the pan you actually own.
Coffee Ratio
Perfect amounts for pour-over, French press and more.
Butter Converter
Sticks, cups, tablespoons and grams.
Brine Calculator
Exact salt for brines, pickles and ferments.
Roasting Time
Oven time and target temperature by weight.
Learn the why
Guides worth reading
How to Measure Flour (and Why Your Cookies Keep Failing)
The 30% mistake hiding in your measuring cup, and the fix.
Sourdough Hydration, Explained Simply
What 70% vs 80% really means for your loaf.
The Coffee Brew Ratio Guide
Every method, the ratio to start with, and how to adjust.
Our approach
Why weigh instead of measure?
A "cup of flour" can weigh anywhere from 110 g to 150 g depending on how you fill it. That's a swing of more than 30%, enough to turn a soft cookie into a dry one or a tender cake into a dense one. Professional bakers solved this a long time ago: they weigh everything.
Every tool on KitchenArithmetic is built around weight first, with the volume measures home cooks actually use translated accurately for each ingredient. Where a number depends on a choice (spooned or scooped flour, fan or conventional oven) we tell you which one we assumed.