Sourdough Baking Journal + Baker's Percentage Calculator

What you get

Bake better sourdough with the numbers worked out for you – even with no internet.

This digital download gives you two tools: an offline calculator app that runs in your browser, and a 20-page printable baking journal for the kitchen.

THE OFFLINE APP (one HTML file – no internet, no account, no subscription)
- Baker's percentage calculator: enter flour, hydration %, levain % and salt % – grams appear instantly
- Two ways to count hydration: "dough flour only" or "total incl. levain" (true hydration – the flour and water inside your levain are taken into account)
Example: 1000 g flour, 75 %, 20 % levain at 100 % hydration, 2 % salt → 900 g flour, 650 g water, 200 g levain, 20 g salt
- Recipe scaling by flour amount or by number of loaves × dough weight
- Levain build calculator (any ratio, e.g. 1:2:2)
- Starter feeding log: ratio (1:1:1, 1:5:5 …), amounts, temperature, rise %, peak time – with a rise chart
- Bake journal: formula, bulk and cold-retard times, temperatures, 5-star results and notes
- Bake-day schedule: plan backwards from your bake time or forwards from your start; every step and stretch-and-fold gets a clock time, with a live countdown and optional beep
- JSON backup & restore, CSV export, printable views, demo data, light/dark theme, works on phone and tablet
- °C or °F

THE PRINTABLE JOURNAL (20 pages, A4 and US Letter)
- How to use + baker's percentage explained with a worked example
- Ready-calculated hydration tables (65–85 %) for 1000 g and 500 g flour, plus levain 10–30 %
- Loaf scaling table and starter feeding amounts table
- Temperature conversions
- Starter feeding log (3 pages), bake-day planner, bake log (6 pages), recipe cards
- Troubleshooting charts for the loaf and the starter (common causes and what to try next)
- Flour inventory and dotted notes pages

HOW IT WORKS
1. Download and unzip
2. Open the HTML file in Chrome or Edge (Windows/Mac) – it works offline
3. Print the PDF at home or at a print shop

PLEASE NOTE
- Digital download only – nothing will be shipped.
- Data is stored only in your browser on your device. Safari/Firefox may not keep data for local files – use the backup button regularly.
- The troubleshooting pages contain general, widely shared baking guidance – every flour and kitchen behaves a little differently.
- For personal use.

Languages included in this download: English, German (one ZIP file per language).