GC GlobalConvert

Sales Tax Calculator

Calculate sales tax and final purchase price.

Results are estimates and may differ from actual tax, payroll, accounting or investment outcomes.

Sales tax calculator

Estimate sales tax for a purchase by entering the pre-tax amount and applicable tax rate. Local rules can include multiple state, county or city rates.

How it works

Frequently asked questions

How is sales tax calculated?

Sales tax is generally calculated by multiplying the taxable purchase amount by the applicable tax rate.

Does every location have the same sales tax?

No. Rates and rules can vary by jurisdiction, product and customer status.

Is the result an official tax filing?

No. It is a calculation aid and does not replace tax advice or official tax documents.

Related GlobalConvert tools

Business CalculatorsVat CalculatorBreak Even Calculator

How sales tax is calculated

Enter the taxable amount and the applicable tax rate to estimate the tax and total. The basic calculation is amount multiplied by the tax rate, with the tax then added to the original amount when a tax-inclusive total is needed.

For example, a 100 amount at a 7.5% rate produces 7.50 in tax and a 107.50 total. Real invoices can differ when some goods are exempt, reduced-rate or subject to local rules.

Use the calculator for quick estimates and verify the applicable rate and tax treatment with the relevant tax authority or seller before making a financial decision.