GST Calculator
Add 10% GST to any amount or remove GST from a GST-inclusive price. Instant results for Australian Goods and Services Tax.
Last verified: 1 July 2025How do I calculate 10% GST in Australia?
Add GST: multiply the ex-GST price by 1.1. Remove GST: divide the GST-inclusive price by 1.1. Find the GST component in an inclusive price: divide by 11 — not by 10, because the 10% GST has been added to the ex-GST base, not the inclusive total. GST is a 10% flat rate applied to most goods and services sold in Australia. Source: Australian Taxation Office.
General information and estimates only — not financial, tax, or legal advice. Always verify with a licensed adviser or the ATO.
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