Sales tax calculator
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Add sales tax / VAT to a price, or work backwards from a tax-inclusive total to the pre-tax amount — instantly, in your browser.
Quick answer
To add sales tax: total = price × (1 + rate ÷ 100). A $100 item at 8% tax is $8 tax and $108 total. To remove tax from a total, divide by (1 + rate ÷ 100): $108 ÷ 1.08 = $100 pre-tax.
Not financial or tax advice. Figures are mathematical illustrations only. Real products add fees, taxes, and terms that change the result — confirm with your bank, CA, or official notice. Numbers are not uploaded to our servers for processing.
Pre-tax
100.00
Tax
8.00
Total
108.00
Frequently asked questions
How do I add sales tax to a price?
Multiply the price by the tax rate and add it. Total = price × (1 + rate ÷ 100). For a $100 item at 8% tax, the tax is $8 and the total is $108.
How do I remove tax from a total (reverse VAT)?
Divide the tax-inclusive total by (1 + rate ÷ 100). If a bill is $108 including 8% tax, the pre-tax price is 108 ÷ 1.08 = $100, and the tax was $8. Use the "Remove tax" mode.
Does it work for VAT / GST?
Yes. VAT, GST, and sales tax use the same percentage math — just enter your local rate.
Is my data uploaded?
No. TryCalculatingNow calculates in your browser. Nothing you type is uploaded to our servers for processing.