About the Sales Tax Calculator
A sales tax calculator adds a tax rate to a price to get the total, or removes tax from a tax-inclusive total to find the net amount and the tax. It works for US sales tax and VAT/GST-style taxes.
How Sales Tax Calculator works
Add tax: tax = price × rate; total = price + tax.
Remove tax: net = total ÷ (1 + rate); tax = total − net.
Example: 0 at 8.25% → .25 tax, 8.25 total.
Common uses
- Add sales tax or VAT to a price
- Find the pre-tax price from a tax-included total
- Work out the tax portion of a receipt
- Compare prices across tax rates
Frequently asked questions
How do I add sales tax?
Multiply the price by the tax rate to get the tax, then add it to the price.
How do I remove tax from a total?
Divide the total by (1 + rate). For 8.25% tax, divide by 1.0825 to get the pre-tax price.