GST / VAT Calculator
Add or remove tax.
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About GST / VAT Calculator
The GST/VAT Calculator works out the tax on any amount in seconds. Enter a value, pick a rate with the quick-preset buttons (5, 12, 18, 28%) or type your own, and choose whether to add tax to a net figure or remove tax from a gross figure. It shows the tax amount alongside the net and gross totals in a clear stat grid.
It is completely free with no sign-up, no limits, and no ads. Every calculation runs entirely in your browser, so nothing you type is ever sent to a server or stored anywhere. Copy the full breakdown to your clipboard with one click.
Frequently asked questions
- Is the GST/VAT calculator free to use?
- Yes, it is 100% free with no sign-up, no usage limits, and no hidden charges. You can run as many calculations as you like.
- Is my data uploaded or stored anywhere?
- No. Every calculation happens locally in your browser using JavaScript. Your amounts and rates are never transmitted to a server, logged, or saved anywhere.
- How do I add GST or VAT to a price?
- Choose 'Add tax' mode, enter your pre-tax (net) amount, and set the rate. The tax is calculated as amount times rate percent, and the gross total is your amount plus that tax.
- How do I remove GST or VAT from a tax-inclusive price?
- Choose 'Remove tax' mode and enter the gross (tax-inclusive) amount. The tool divides it by 1 plus the rate percent to find the net price, and the difference is the tax portion.
- What do the preset buttons 5, 12, 18, and 28 mean?
- They are common GST slab rates used in India, letting you apply a standard rate with one tap. You can also type any custom rate, such as 20% VAT, in the rate field.
- Can I copy the tax breakdown?
- Yes. Click 'Copy breakdown' to copy the net amount, tax, and gross total to your clipboard as plain text, ready to paste into an invoice or spreadsheet.