Tax Calculator
Sales Tax Calculator
Total with tax
$108.25
Tax (8.25%): $8.25
Pre-tax$100.00
Total$108.25
Add mode: tax = amount × rate ÷ 100 · total = amount + tax.
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Browse allWhat Is a Sales Tax Calculator?
A sales tax calculator adds a tax rate to a pre-tax price or backs tax out of a tax-inclusive total. Useful for receipts, invoices, and checking checkout totals.
Sales Tax Formulas
Add: Tax = Amount × (Rate ÷ 100)
Add: Total = Amount + Tax
Remove: Pre-tax = Total ÷ (1 + Rate ÷ 100)
Remove: Tax = Total − Pre-tax
Frequently Asked Questions
How do you add sales tax to a price?
Multiply the pre-tax amount by the rate percent, then add that tax to the amount.
How do you reverse sales tax?
Divide the tax-inclusive total by (1 + rate/100) to get the pre-tax price.
What is 8.25% tax on $100?
Tax = $8.25 · total = $108.25.
Is this sales tax calculator free?
Yes — free and private in your browser.