GST calculator
Add 10% GST to a price, or take it out of a total that already includes it.
How to use it
- Type an amount.
- Choose whether it includes GST.
- Tap a figure to copy it.
Uses the official rules for 2026–27: ATO: GST.
Questions
How is GST worked out?
GST is 10% of the price before GST. To take it out of a GST-inclusive total, divide the total by 11.
Is this financial or tax advice?
No. It works out estimates from the figures you enter and the published rules shown on the page. It doesn’t consider your circumstances. For a decision, consider talking to a registered tax agent or a licensed financial adviser.
