VAT & GST Calculator
Add VAT or GST to a price, or remove it from a tax-inclusive total (reverse VAT) — in seconds. Enter any rate and currency, and see the net amount, the tax, and the gross total clearly broken down. Works worldwide: UK, EU, UAE, India, Australia, Singapore, and any custom rate.
Choose whether to add tax to a net price or remove it from a gross (tax-inclusive) price, enter the amount and rate, and get a full breakdown. The formula is the same for VAT, GST, and similar sales taxes.
* This calculator uses the standard VAT/GST formula and the rate you enter. Tax rules, registration thresholds, exemptions, zero-rated items, and reduced rates differ by country and product, so always confirm the correct rate and treatment with your local tax authority or an accountant. The CGST/SGST split shown is the standard India intra-state convention (half each). This tool is for general information only and is not tax advice.
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What Is a VAT / GST Calculator?
A VAT or GST calculator works out the tax on a price in two directions: it can add VAT/GST to a net (tax-free) amount to give you the gross price, or remove VAT/GST from a gross (tax-inclusive) price to reveal the net amount and the tax inside it. VAT (Value Added Tax) and GST (Goods and Services Tax) are different names for essentially the same kind of consumption tax, and the math is identical — so this one tool covers both, at any rate, in any currency.
That makes it useful for shoppers checking a receipt, freelancers and businesses preparing invoices, and anyone who needs to separate the tax from a price quickly. Just enter your local rate.
How to Use This VAT / GST Calculator
- Enter the amount — the price you're starting from.
- Choose a direction — add tax to a net price, or remove it from a gross price.
- Set the rate — type it in, or tap a quick-rate button (20% UK, 18% India, 10% Australia, and more).
Click Calculate VAT / GST to see the net, the tax, and the gross — plus an optional CGST/SGST split for India.
How to Add VAT / GST to a Price
Gross = Net + Tax = Net × (1 + Rate ÷ 100)
Example: $100 net at 20% → tax $20, gross $120
Adding tax is the easy direction: a $100 item at 20% VAT becomes $120, with $20 of tax.
How to Remove VAT / GST (Reverse VAT)
Removing tax from a tax-inclusive price is where most people slip up — you can't just subtract the rate. You divide it out:
Tax = Gross − Net
Example: $120 gross at 20% → net $100, tax $20
(Not $120 − 20% = $96, which is the common mistake!)
This "reverse VAT" calculation is essential for invoices and bookkeeping, where you often know the total a customer paid and need to pull out the tax portion.
VAT and GST Rates Around the World
Rates vary widely by country. Some common standard rates:
| Country / Region | Tax | Standard Rate |
|---|---|---|
| United Kingdom | VAT | 20% |
| European Union (varies) | VAT | ~17–27% |
| UAE & Gulf states | VAT | 5% |
| India | GST | 5%, 12%, 18%, 28% |
| Australia | GST | 10% |
| New Zealand | GST | 15% |
| Canada (GST/HST) | GST | 5% (+ provincial) |
Always confirm the rate for your country and product, since reduced and zero rates apply to many goods.
VAT vs GST vs Sales Tax
They're closely related consumption taxes with key differences. VAT and GST are charged at each stage of the supply chain, with businesses reclaiming the tax they pay on inputs, so the end consumer effectively bears it. Traditional US-style sales tax is charged once, at the final sale. The everyday math for a single price is the same, though — which is why this calculator works for all three. For US-style sales tax specifically, see our Sales Tax Calculator.
What Is the CGST / SGST Split? (India)
In India, GST on a sale within the same state is split into two equal halves: CGST (Central GST) and SGST (State GST). So 18% GST is recorded as 9% CGST + 9% SGST. For sales between states, a single IGST applies at the full rate instead. Turn on the breakdown above to see this split for your amount.