VAT & GST Calculator
Add VAT or GST to a net price, or remove it from a VAT-inclusive total — at any rate, in any currency. Works for the UK, EU, Australia, New Zealand, India and more.
Calculator
- Net (excl. VAT)
- $100.00
- VAT / GST
- $20.00
- Gross (incl. VAT)
- $120.00
How this breaks down
At a 20% rate, $100.00 net becomes $120.00 gross — the VAT/GST added is $20.00.
Common rates: UK 20% (5% reduced), Ireland 23%, Germany 19%, Australia & New Zealand GST 10%/15%, India GST 5–28%. Set the rate that applies to your purchase.
About this calculator
This calculator does both halves of a VAT or GST sum. In "add" mode it takes a net price and shows the tax and the gross (tax-inclusive) total you would charge or pay. In "remove" mode it works backwards from a gross, VAT-inclusive price to recover the net amount and the tax baked inside it. Pick any rate — UK 20%, EU rates, Australian or New Zealand GST, Indian GST slabs — and any currency. Nothing is converted between currencies: the figure you type is the figure that is taxed.
How to read your results
The headline figure is the result of the operation you chose: the gross total when adding tax, or the net price when removing it. The three stats always show the same breakdown — net (before tax), the VAT/GST amount, and the gross (after tax) — so you can read off whichever line you need. When removing VAT, note that the tax is a smaller share of the gross than the rate suggests: 20% VAT is only one-sixth (16.67%) of a tax-inclusive price, because the rate is applied to the net, not the gross.
How it's calculated
Let r be the rate as a fraction (rate / 100). In add mode the input is the net price: VAT = net x r, and gross = net + VAT = net x (1 + r). In remove mode the input is the gross, tax-inclusive price: net = gross / (1 + r), and VAT = gross - net. A zero rate leaves the price unchanged in both directions. All money figures are rounded to two decimal places; the rate and chosen operation are echoed back with the result.
Worked example
Add mode, net price 100, rate 20% (UK standard VAT).
The VAT is 20 and the gross price is 120. Switch to remove mode with a gross of 120 at the same 20% and you get back exactly: net 100, VAT 20.
Frequently asked questions
How do I add VAT to a price?
Choose "add", enter the net (pre-tax) price and the rate. The calculator multiplies the net by the rate to get the VAT, then adds it on: gross = net x (1 + rate / 100). At 20% a net 100 becomes a gross 120.
How do I remove VAT from a gross price?
Choose "remove" and enter the gross (tax-inclusive) price. The net is the gross divided by (1 + rate / 100), and the VAT is the difference. Removing 20% from 120 gives a net of 100 and 20 of VAT — not 24, because the rate applies to the net, not the gross.
Why is the VAT in a gross price less than the headline rate?
Because the rate is charged on the net amount. A 20% rate means the VAT is one-sixth of the gross (16.67%), a 10% GST is one-eleventh (9.09%), and a 5% rate is one-twenty-first (4.76%). The reverse calculation accounts for this automatically.
Which rate should I use for VAT or GST?
Use the rate that applies to your goods or service and country. The UK standard rate is 20% (with a 5% reduced rate and 0% zero rate), Ireland 23%, Germany 19%, Australia and New Zealand charge GST at 10% and 15%, and India uses GST slabs of 5%, 12%, 18% and 28%. Always confirm with the local tax authority.
Does this convert between currencies?
No. The currency selector only labels the result — VAT and GST are charged in the price's own currency, so the engine never converts. Enter the amount in whatever currency it is denominated in.
Sources
Reviewed by the YouCalc Team · Last reviewed
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