About My Sales Tax Calculator
A lightweight U.S. sales tax estimator for shoppers and small sellers—no accounts, no rate API calls at runtime.
What this site does
We provide a forward sales tax calculator and a reverse sales tax calculator. Rates ship as static JSON baked into the site at build/deploy time.
Data sources
- Tax Foundation — State & Local Sales Tax Rates, Midyear 2026 (primary table; as of 2026-07-01).
- California CDTFA — confirms the statewide base rate of 7.25% (district taxes vary by address).
Population-weighted average local rates are planning figures. Sample city rates are illustrative and may lag local ordinance changes.
Privacy
Purchase amounts, cities, and ZIP codes are not uploaded to our servers for storage. See Privacy.