Copyright
Excel Workbook
Copyright © 2019–2026 Paul Lefevre & Karl Sinclair.
The workbook data and formulas are licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International licence.
Web App
This web app is an adaptation of the IFC Fert Calculator Excel workbook. Its implementation, interface, workflow, validation, and summary pages were created by Paul Lefevre.
The IFC Fert Calculator Excel Workbook serves as the source and calculation engine for the web app calculator’s logic, formulas, data, and outputs. All workbook-derived elements remain licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International licence.