Sales Tax Calculator
Add or remove sales tax in seconds — get the tax amount and total from a net price, or work backwards from a tax-inclusive total.
Input
Enter an amount and tax rate to calculate.
The Sales Tax Calculator adds tax to a net price or removes it from a tax-inclusive total, showing both the tax amount and the other figure. It is useful for invoicing, expense reports, and checking receipts where you need to separate the price from the tax.
How to use the Sales Tax Calculator
- Enter the price you are starting from.
- Enter the sales tax rate as a percentage.
- Choose whether to add tax to a net price or remove it from a gross total.
- Read the tax amount and the resulting total or net price.
Frequently asked questions
- How do I add sales tax to a price?
- Tax = net price x rate/100, and the total is net price + tax. A 50 item at an 8% rate has 4 in tax for a 54 total.
- How do I remove sales tax from a total?
- Net price = total / (1 + rate/100). From a 54 total at 8%, the net price is 54 / 1.08 = 50, so the tax included was 4.
- Why is removing tax not just subtracting the percentage?
- Because the percentage was applied to the smaller net price, not the larger total. Subtracting 8% of 54 would over-remove the tax, so you must divide by 1.08 instead.
- What sales tax rate should I use?
- Rates depend on your country, state, or city, and some places combine several rates. Enter the combined rate that applies to your transaction for an accurate result.