GST / VAT Calculator — Free Online Tool
Calculate GST, VAT, or sales tax in two modes: add tax to a price (net to gross), or extract the tax component from a tax-inclusive price (gross to net). Common tax rates from 5% to 28% are available as quick presets. Shows net amount, tax amount, and gross amount with formula.
100% client-side. No uploads. Your data never leaves your browser.
How to use GST / VAT Calculator
- Select Add Tax or Extract Tax mode.
- Enter the amount and tax rate.
- Click a quick-rate button or type a custom rate.
- Copy the net, tax, or gross amount.
Frequently Asked Questions
What is the difference between Add and Extract mode?
Add mode calculates tax on a net price (before tax). Extract mode backs out the tax from a gross price that already includes tax.
Can I use this for any tax rate?
Yes. Enter any rate from 0% to 100%. Common rates (5%, 10%, 18%, etc.) are available as quick presets.
How do I calculate the net amount from an inclusive price?
Switch to Extract mode, enter the gross (inclusive) price, and set the rate. The tool shows the original net price and the tax component.
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