How to use this calculator
- Enter or choose i have.
- Enter or choose amount.
- Enter or choose sales tax rate.
- The sales tax updates as you type. Use Copy result or Share to keep it.
Method
Adding: Tax = Price × Rate; Total = Price + Tax. Removing: Price = Total ÷ (1 + Rate); Tax = Total − Price
- Rate
- sales tax rate as a decimal (8.25% = 0.0825)
Worked example
- Tax = 100 × 0.0825 = $8.25.
- Total = 100 + 8.25 = $108.25.
- Check in reverse: 108.25 ÷ 1.0825 = $100.
An 8.25% sales tax on $100 is $8.25, for a total of $108.25.
What the result means
To remove tax, divide; do not subtract the rate from the total. Taking 8.25% off $108.25 gives $99.32, not the $100 pre-tax price.
Assumptions and limits
- A single combined rate applies to the whole amount; you supply the rate.
- No rates are built in: rates vary by state, county and city, and some goods are exempt or taxed differently.
- Tax is calculated on the total, so per-item rounding at the till can differ by a cent.
Questions
Where do I find my sales tax rate?
Your state revenue department publishes state and local rates. The combined rate is often printed on receipts.
Is VAT or GST the same calculation?
Yes, adding or removing a percentage tax works the same way. For Indian GST use the GST Calculator, which handles CGST and SGST.