SimpleTaxCalculator is a free online tool that provides a suite of US tax calculators for the 2026 tax year. Its primary function is to help individuals estimate various tax liabilities, including sales tax, capital gains tax, gas tax, and property tax, without requiring user registration or payment. The tool is designed for informational purposes and does not provide professional tax advice. The platform features several specialized calculators. The Sales Tax Calculator computes combined state and local sales tax rates by county. The Capital Gains Tax Calculator estimates federal and state taxes on gains from stocks, crypto, and real estate. The Gas Tax Calculator determines state and federal fuel taxes per gallon or per fill-up. The Property Tax Estimator calculates annual property tax based on assessed value and local mill rates. All rate data is sourced directly from official state Department of Revenue websites and is audited quarterly, with updates published within 48 hours of any official change. Typical use cases involve a user selecting a specific state or entering a dollar amount to receive an instant tax estimate. For example, a user can calculate the total sales tax on a purchase in a specific county or estimate the capital gains tax on a stock sale. The workflow is straightforward: the user navigates to the desired calculator, inputs the relevant financial figures or location, and receives the calculated result. The site is maintained by a human editor and includes an editorial policy detailing the rate verification process. No technical installation or account creation is required, as all tools operate directly within a web browser.