GST Calculator
Calculate GST instantly: add GST to a net amount or extract it from a gross amount. Runs entirely in your browser.
Result
Total (incl. GST)1,180.00
- Base amount
- 1,000.00
- GST amount
- 180.00
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About this tool
Add GST to a net amount or extract it from a gross total at any rate, with the base, tax and total shown clearly.
Common use cases
- Add GST to an invoice line
- Back out GST from a receipt total
- Check tax at 5, 12, 18 or 28%