GST / Sales Tax Calculator
GST / Sales Tax Calculator adds tax to a net price or extracts the tax from a gross price at any rate, showing the net amount, tax amount and total.
Last updated: July 2026
Add or remove GST / sales tax from a price at any rate, and see the net, tax and gross amounts. Free, instant calculator.
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How to use GST / Sales Tax Calculator
- Enter an amount and tax rate.
- Choose to add or remove tax.
- Read the net, tax and gross figures.
Frequently asked questions
Can it remove tax from a gross price?
Yes — “remove” mode back-calculates the original net price and the tax included.
Does it work for VAT too?
Yes, it works for any percentage-based tax: GST, VAT or sales tax.
Is it free?
Yes, free and instant.
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