What you get
This is a working native Google Sheet, not a blank worksheet. The model already contains editable inputs, formula-driven outputs, tannerd.net attribution, methodology notes and a link back to the matching web calculator.
Use the template without changing the master
Use in Google Sheets opens the public template preview. Make your own copy jumps directly to Google's copy flow so your scenarios stay in your Drive and the public master remains unchanged.
Prefer the browser calculator?
The matching tannerd.net web calculator is faster for a single calculation. Use the spreadsheet when you want to save assumptions, compare scenarios or extend the model.
Transparent distribution
Public Sheet: view source workbook · Machine catalog: template catalog.