Australia GST Calculator

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The Australia GST Calculator is designed to allow free online calculations for goods, services and products which are subject to GST (Goods and Service Tax) in Australia. For those outside Australia, GST is the same type of transactional tax as VAT (Value Added Tax), a more commonly used term for this type of taxation across the globe. The calculator allows quick GST calculations and more detailed GST calculations with multiple items, product/service descriptions with a running total so you can see the GST due on each product/service and the total GST due in Australia in 2023. Once you have calculated the GST due, you can print the document or email the GST document to yourself for later reference.

Australia GST Calculator
What would you like to do?
*** Please enter a value for the product or service ***
Quick Australia GST Calculation
Product/Service Price
+GST Due

=Total Price inc. GST
Australia GST Table


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How to calculate GST in Australia

You can calculate GST in Australia by multiplying the product or service price by the appropriate GST rate. We have included the GST formula for Australia so that you can calculate the GST manually or update your systems with the relevent GST rates in Australia. The latest GST rates in Australia for 2023 are displayed in the table below the GST formula. For those who prefer to use the Australia GST Calculator rather than calculate GST manually, we have included a step-by-step guide to using the calculator for quick GST calculations and more detailed GST calculations which include multiple products and or services (see the guides under "How to use the Australia GST Calculator").

Australia GST formula

Australia GST Calculator. This image shows the Australia flag and information relating to the GST formula used for calculating goods and service Tax in Australia using the Australia GST Calculator in 2023

The Goods and Service Tax in Australia is calculated using the following GST formula:

GST = a x (b / 100)


  • a = The product/service that is subject to GST in Australia.
  • b = The relevenat rate of GST in Australia associated with the product/service.

GST Rates in Australia

The table below specifies the relevent GST rates applicable in Australia, these were last updated in line with the published GST rates in 2023.

Australia GST Rates
GST RateGST Description
10%Standard Rate

How to use the Australia GST Calculator

You can view the calculator inline or full screen. The inline view displays the calculator surrounded by the normal menus and links to other tools and supporting information. The full screen view removes or the unnecessary information so you can focus solely on using the Australia GST Calculator. The following step-by-step guides to calculating GST online with the Australia GST Calculator covers all the functions within the GST calculator:

How to complete a Quick GST Calculation

  1. Select Normal View or Full Screen View.
  2. Select "Quick GST Calculation".
  3. Enter the Product/Service Price.
  4. Enter the Appropriate GST Rate.
  5. Press "Calculate GST".

The Australia GST Calculator will provide a table which specifies the product/service price, the product/service GST amount due and the total cost of the product or service in Australia. You can print/email this table as required.

How to complete a Detailed GST Calculation

  1. Select Normal View or Full Screen View.
  2. Select "Detailed GST Calculation".
  3. [Optional] enter the name of the product or service for which you wish to calculate GST.
  4. Enter the number of units being sold (3 bags, 5 SEO guest post packages, 2 new cars, 1 annual tax return etc.).
  5. Enter the price of the product / service detailed in step 3.
  6. Select the relevent GST rate that applies to your goods, product or service in Australia
  7. Click "Add to GST Table"

Australia GST Calculator will add your product/service to the Australia GST Table. You can then add more product and/or services as required. Each time you add new information, the total amount will be updated so you can see the total costs of goods, products and services in Australia inclusive and exclusive or GST.

If you make a mistake or simply want to remove an entry from the Australia GST Table, click on the "Del" button adjacent the line entry that you wish to remove. When items are removed from the GST tbale, the calculator will automatically update the associated figures and recalculate GST, total cost of goods etc.

Please note that the Australia GST Calculator is designed to allow you to toggle between quick and Detailed calculations without losing any data that you add to the Detailed GST Table. This is useful if you need to check the individual GST amount on one unit (a single product or service) before adding it to the list of items in the GST table.

More Good Calculators for Australia

If you found this information about GST in Australia useful and liked our free online GST calculator for Australia then you will probably find the following calculators and supporting Australia tax tables useful.