GST Calculator
A simple Goods and Services Tax calculator for working out how much GST is in an amount or how much GST to add to an amount.
Instructions on how to use the GST Calculator
For New Zealand businesses select "New Zealand" under the Country option.
Using the GST Calculator to find the GST amount in a price
To find GST included in a price
- put the amount in the Price including GST box. This will show you the GST portion and the GST exclusive amount.
Using the GST Calculator to add GST to a price
To add GST to a GST exclusive price
- put the amount into the Price excluding GST box. The GST inclusive amount will be shown along with the GST portion.
Want to know more about GST for NZ businesses including how GST is calculated? See our guide: GST for New Zealand Businesses: A Comprehensive Guide
A full GST guide from Inland Revenue can be found here.