Choose this path if your calculator depends on an Excel, LibreOffice, or OpenDocument worksheet.
Use this path when
- the calculation already exists in a spreadsheet
- you need mapped cells for inputs, outputs, or errors
- you want worksheet-based logic that is easier to maintain outside a formula string
Recommended order
- Read Create input and output fields.
- Review Configure output fields if the worksheet returns extra values.
- Follow Build a spreadsheet calculator.
- Use Edit spreadsheet mapping whenever cells or worksheets change.
- Assign products in Assign products and categories.
- Validate mapped inputs, outputs, and errors in Preview and test the calculator.
Tip: if your logic can be expressed without a worksheet, use Start with a formula calculator instead. It is usually faster to build and easier to maintain.