About the VAT & Sales Tax Calculator
Work out VAT, GST or sales tax in seconds. Add tax to a price before tax to get the total, or remove tax from a price that already includes it to find the net amount and exactly how much of it is tax.
Type any rate or pick a common one, and see the net amount, the tax and the gross total side by side, together with the formula used. It works with any currency, and nothing you enter leaves your browser.
How to use the VAT & Sales Tax Calculator
- Choose “Add tax” if your amount is before tax, or “Remove tax” if tax is already included.
- Enter the amount, either “Amount before tax” or “Amount including tax”.
- Type the “Tax rate” or tap one of the common rates.
- Read the net amount, the tax and the gross total, plus the formula used.
Frequently asked questions
What is the difference between adding and removing VAT?
Adding VAT starts from the net price and puts the tax on top: gross = net × (1 + rate ÷ 100). Removing VAT starts from a price that already includes tax and takes it back out: net = gross ÷ (1 + rate ÷ 100), and the tax is gross − net.
Why can’t I just subtract 20% to remove 20% VAT?
Because the tax was calculated on the net price, not on the gross. With a 20% rate, a gross price of 120 contains 20 of tax (120 ÷ 1.2 = 100 net). Subtracting 20% of 120 would give 96, which is wrong.
Does it work for GST and US sales tax?
Yes. VAT, GST and sales tax are all a percentage added to a price, so the maths is the same. For sales tax, combine the state and local rates into one rate.
Which currency does it use?
None in particular. Enter amounts in any currency; results are rounded to two decimals for display.