GST calculator AU
Add or remove 10% GST. See exclusive, GST, and inclusive totals side by side. Free, no email gate, no signup required.
10% is added on top of this amount.
Enter an amount to see the 10% GST split.
What you get, and where it stops
This calculator provides clean, fast arithmetic for quotes and invoices. Here is what is included and where invoicing software takes over.
What it does
- Adds 10% GST to exclusive amounts, or extracts 10% GST from inclusive totals.
- Displays the exclusive amount, 10% GST portion, and inclusive total side by side.
- Uses exact 1/11 fraction calculation for inclusive GST to prevent rounding errors.
- One-click copy for any calculated figure directly to your clipboard.
What it does not do
- Does not prepare or submit your Business Activity Statement (BAS) to the ATO.
- Does not automatically generate an invoice document from the calculation.
- Does not determine whether your specific sales are GST-free or input taxed.
- Does not sync figures to your bank feed or accounting software.
If you want the record kept
Invio calculates GST automatically on every invoice and keeps your full audit trail. The free plan includes 5 invoices a month with no credit card required. See what each plan adds
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