About Sourdough Maths

Sourdough Maths is a small, free tool that helps home bakers turn the recipe they have in their head into exact gram weights. No fluff, no life story before the recipe, no thirty-paragraph SEO preamble. Just the numbers, plus a few plain-English articles to fill in the gaps.

Who made this

The site is built and maintained by Mark Stent. I am a software engineer and an obsessive home baker. I built Sourdough Maths because every existing online calculator was either ad-choked, mathematically wrong, or wrapped in a 2,000-word recipe blog post when all I wanted was four numbers.

What you can trust

• The maths are the standard baker's percentage system used by professional bakers. The formulas are open and explained on the baker's percentage guide.
• Every recipe page is built from the same underlying calculator, so the numbers are consistent across the site.
• The flour-type hydration adjustments are based on widely accepted ratios from home and professional baking sources.
• If you find something wrong, please email us. Corrections matter.

How the site stays free

The free tier is supported by display ads. A paid subscription removes ads and unlocks recipe saving plus a bake log. See pricing for the details. Either way, the calculator and every recipe page are free for everyone.

Contact

Questions, corrections, or feature requests: see the contact page.