Developer Builds Free Sourdough Hydration Calculator Using Next.js 14 for $0/Month

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A software developer created a free, no-signup sourdough hydration calculator after watching their partner struggle to interpret baker's percentage recipes. The tool converts hydration percentages into exact gram measurements for flour, water, and starter, automatically accounting for the 50/50 flour-water split in sourdough starter. Built with Next.js 14, TypeScript, and Tailwind CSS, the site is deployed as a fully static export on Cloudflare Pages with no backend or database. The project runs at effectively zero monthly cost, with the only recurring expense being an approximately $10 annual domain registration fee. Six preset hydration levels are included, ranging from 65% for bagels to 100% for ciabatta, with an optional cups-and-teaspoons toggle for casual bakers.

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