Per Diem & Allowances Lookup brings U.S. government travel rate data directly into Google Sheets. The add-on provides custom formulas that make it easy to look up current per diem and allowance rates published by GSA, DSSR, and DTMO, covering both continental U.S. locations (CONUS) and outside continental U.S. locations (OCONUS).

Users can retrieve structured rate data without manually searching government websites, PDFs, spreadsheets, or rate tables. The add-on is designed to support travel planning, expense estimates, proposal pricing, relocation calculations, overseas assignment planning, and finance, HR, payroll, and government contractor workflows that depend on accurate per diem and allowance information.