GST / VAT Calculator

Add GST or VAT to a price, or remove it from a tax-inclusive total.

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About this tool

Works with any tax rate. Choose whether your amount excludes tax or already includes it, and see the tax and net values.

How to use GST / VAT Calculator

  1. Enter the amount and the tax rate.
  2. Choose to add tax or remove tax.
  3. Press Calculate to see net amount, tax and total.

Frequently asked questions

What is the difference between adding and removing tax?

Adding treats your amount as pre-tax. Removing treats it as the final price and works backwards to the net price.

Can I use this for sales tax?

Yes. Any percentage-based tax follows the same math.