About PerDiemCalculator
PerDiemCalculator.com provides free planning tools for travelers who need realistic per diem estimates—not generic spreadsheets. We publish profession-specific calculators, state rate hubs, and guides that explain how federal GSA rates, IRS transportation rules, and employer policies differ.
Who we serve
- Federal employees and contractors using GSA CONUS rates
- Airline pilots and cabin crew (contract pay vs GSA M&IE worksheets)
- Teachers, travel nurses, locum physicians, field sales, police, and hospitality corporate staff
- Over-the-road truck drivers on IRS transportation industry M&IE
Data & disclaimer
Rates are loaded from published federal sources (including the GSA Per Diem API where applicable). Our tools are planning aids only—not payroll, tax, or legal advice. Always verify amounts with your agency, employer, or tax preparer. See methodology for details.