Free tool · Australian GST

Free GST calculator (Australia)

Add 10% GST to an ex-GST price, or take it out of a GST-inclusive total. Paste a whole list to convert in bulk and download a CSV.

10% GST · bulk mode · runs in your browser · nothing uploaded · free

Calculator

Paste amounts, one per line

 

How GST is calculated in Australia

GST is 10%. To add it, multiply the ex-GST price by 1.1. To remove it from a GST-inclusive price, divide by 11 to get the GST amount (or divide by 1.1 for the ex-GST price). For example, $110 including GST has $10 GST and $100 ex-GST.

Only businesses registered for GST charge it, and you can only claim credits on a valid tax invoice from a registered supplier. Use the bulk ABN lookup to check suppliers.

FAQ

How do I calculate GST from a total?

Divide the GST-inclusive total by 11. That is the GST portion.

How do I add GST to a price?

Multiply by 1.1.

Is my data uploaded?

No. Everything runs in your browser. Built with AI assistance by Luke Main; general information only, not tax advice.