Free web tool · AU · 10% GST · ATO · checked 2026-10-17
GST calculator for Australia
Add 10% GST to a price, or work out the GST inside a GST-inclusive total. Nothing you type leaves this page.
Australian dollars, e.g. 1,250.50
Rate: 10% (fixed). Taxable sales only; GST-free and input-taxed sales have no GST.
Total including GST
A$220.00
- Price excluding GST
- A$200.00
- GST (10%)
- A$20.00
- Price including GST
- A$220.00
Formula: excl. × 1.1 = incl.
Step 2 · Continue on iPhone (App Store)
Turn A$200.00 excl. + A$20.00 GST = A$220.00 into an ABN Tax Invoice in Keel.
Save A$220.00 on iPhone (Keel) 
On desktop? Scan with iPhone camera
Send link to iPhone: Email · SMS
Session log · this tab only
Your recent calculations
| Mode | Entered | GST | Result |
|---|---|---|---|
| Nothing yet. Change the amount to add a row. | |||
How to add or remove GST
Add GST
Excl. × 1.1
$200 → $220Remove GST
Incl. ÷ 11 = GST
$352 → $32 GSTExcl. price
Incl. ÷ 1.1
$352 → $320“Goods and services tax (GST) is a broad-based tax of 10% on most goods, services and other items sold or consumed in Australia.”Australian Taxation Office · How GST works
“At G9, divide G8 by 11. Transfer this amount to 1A (GST on sales) on your BAS.”Australian Taxation Office · Calculating sales using the calculation worksheet
How to add 10% GST or divide by 11 on Australian tax invoices
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Ilura Technology OÜWritten and checked against the official sources listed on the page. Editorial standards