VAT Calculator
Add or remove VAT, GST or sales tax to get the gross, net and tax amounts instantly, with one-click rates for the UK, Germany, Japan and more. Free, no signup.
Add tax (net → gross)
Gross amount (with tax): 120 Tax: 20
Remove tax (gross → net)
Net amount (before tax): 100 Tax: 20
Find rate (net + gross → rate %)
Tax rate: 20%
🔒 Calculated in your browser — nothing is uploaded. Plain numbers, no currency.
Add tax to a net amount
Enter a net (tax-exclusive) amount and a tax rate, and the tool instantly shows the gross total and the tax portion. If you do not know the rate, the buttons above the fields fill in the standard ones people most often need: Korea 10%, the UK 20%, Germany 19%, France 20%, the Netherlands 21%, Italy 22%, Japan 10% and Singapore 9%. That is deliberately not a complete tax table — a wrong one of those is worse than none — and any rate can still be typed in by hand. Amounts are shown with thousands separators, because a six-figure number without them is unreadable on an invoice, which is the one thing this tool is for.
Remove tax from a gross amount
Already have a tax-inclusive total? The second section works backwards using net = gross ÷ (1 + rate ÷ 100) to reveal the original net amount and how much of the total was tax. A preset button sets the rate in both sections at once, so the two halves cannot quietly disagree. Displayed figures are rounded to two decimals for readability while the underlying math stays exact.
Find the rate from two amounts
The third section takes a net and a gross and gives the rate between them: rate = (gross − net) ÷ net × 100. That is the section for checking a receipt whose tax line looks wrong, or for working out which rate a supplier actually applied. Everything uses plain numbers with no currency, so the same calculator works for VAT, GST or any sales tax anywhere — read the result in whatever units you entered.
Frequently asked questions
How do you add VAT to a net price?
Tax = net × rate ÷ 100, and gross = net + tax. For example, adding 20% to 100 gives 20 in tax and 120 gross.
How do you remove VAT from a gross total?
Net = gross ÷ (1 + rate ÷ 100). With a 20% rate, a gross of 120 divides by 1.2 to give a net of 100, so the tax was 20. Taking 20% off the gross does not give the right answer, which is why this reverse formula is used.
I know the two amounts but not the rate — can I work it out?
Yes, that is the third section: rate = (gross − net) ÷ net × 100. A net of 100 and a gross of 122 gives 22%. It is the quickest way to check a receipt whose tax line looks wrong, or to identify the rate a supplier applied.
Which rates do the preset buttons use?
The standard rate for each country, checked against the tax authority in August 2026: KR 10%, UK 20%, DE 19%, FR 20%, NL 21%, IT 22%, JP 10%, SG 9%. Reduced rates — Japan charges 8% on groceries and newspapers, for instance — are not included, since which goods qualify is a question no calculator can answer for you. Type the rate in yourself for those.
Is anything uploaded to a server?
No. Every calculation runs entirely in your browser with JavaScript. Nothing you type is sent anywhere or stored.