Welcome to the Barn
What WorkbookBarn is, what is free, and how every workbook gets tested before it is listed.
Read →Notes from the barn
Blog.
Notes from the barn: what shipped, what broke in testing, and what we learned building spreadsheets people actually use. Worked examples live under Guides.
The collection
Every post points at something you can open.
Workbooks on Etsy, calculators here, arithmetic shown in full.
Browse the workbooksEducational estimates only. These calculators and workbooks do the arithmetic on the figures you enter; they are general-purpose tools, not financial, investment, tax, legal, lending, insurance or construction advice, and no result is a quote, an offer, or a guarantee of any outcome. Results depend entirely on your inputs and assumptions.