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sales taxClassic tool

Sales Tax Calculator

Calculate subtotal, tax amount, final total and effective rate for sales tax, VAT or GST.

Use this sales tax calculator to work out how much tax is added to a purchase, what the pre-tax subtotal should be and what final total a customer will pay. It fits common manual pricing scenarios for sales tax, VAT, GST, invoices, proposals and checkout checks.

You can add tax to a subtotal, extract tax from a total that already includes it or estimate the effective rate when you know the before-tax and after-tax prices. That makes the tool useful for budgeting, international shopping, retail pricing, freelance quotes and finance reviews.

The result breaks the calculation into subtotal, tax amount, rate and total so the numbers are easier to verify. It is a practical option when you want a fast answer without opening a spreadsheet or rewriting the formula every time.

Useful for sales tax, VAT, GST and manual price checks before checkout.

Tip: when extracting tax from a total, enter the same rate used in the original price.

SummaryChoose a mode and fill in the required fields to calculate tax and total.
Subtotal—
Tax amount—
Rate—
Final total—
Applied formula—

Use clear inputs to get a more useful result.