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About KitchenArithmetic

Free tools for the maths that gets in the way of cooking.

Why we exist

Most cooking problems aren't about skill. They're about numbers: a recipe written for 4 when you're feeding 10, a British cake recipe in grams when you own measuring cups, a sourdough formula that assumes you know what "75% hydration" means. KitchenArithmetic turns those numbers into quick, clear answers so you can get back to cooking.

How we build our tools

How we make money

KitchenArithmetic is free and supported by display advertising and affiliate links. When we recommend equipment, like a kitchen scale, we may earn a small commission if you buy through our link, at no extra cost to you. We only recommend types of gear we'd tell a friend to buy.

Get in touch

Found a number that looks wrong, or want a calculator we don't have yet? Email tutuvictor51@gmail.com. We read everything.