Add sales taxLive calculation
Tax amount and total
Free sales tax calculator
Calculate in your browser
Enter a pre-tax subtotal and the applicable sales tax rate to calculate the tax amount and total customer price.
Free, no sign-up, and the entered values stay in your browser.
Formula
How the calculation works
Enter a pre-tax subtotal and the applicable sales tax rate to calculate the tax amount and total customer price.
Sales tax = pre-tax subtotal × tax rate. Total = subtotal + sales tax.Enter the rate that applies to the transaction. Taxability, sourcing, exemptions and local rates vary by jurisdiction and transaction type.
Use the result
Move from calculation to a customer document.
Confirm the measurements, rates, tax treatment and project scope before relying on an estimate. Keep the calculation with the customer record, then place the verified figures in an itemized estimate, quote or invoice.
These browser calculations support planning and pricing. They do not replace field measurements, supplier quotations, payroll, accounting, tax, lending or professional advice.
Frequently asked questions
Questions about free sales tax calculator
Where do I find the correct sales tax rate?
Use the official tax authority or revenue department for the jurisdiction involved. Combined state and local rates can vary by location.
Does every invoice require sales tax?
No. Taxability depends on the product or service, customer, location and applicable rules. Confirm the treatment before charging tax.
Can I use this result on an invoice?
Yes, after confirming the applicable rate and taxable amount. Show the subtotal, rate, tax amount and total clearly.
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