GST Calculator
Calculate GST on an original amount or separate tax from a GST-inclusive price.
Add GST to an amount
Calculate GST from an inclusive amount
About GST calculations
GST is calculated as a percentage of the taxable amount. For an inclusive price, the original amount is found by dividing the total by one plus the tax rate.
Tax rules and applicable rates can vary by product, service and location. Confirm the correct rate before using these figures for tax or accounting decisions.