About This Tool
The GST Calculator helps you calculate Goods and Services Tax both ways: add GST to a base price (exclusive) or extract GST from a total price (inclusive).
Frequently Asked Questions
What is the difference between GST inclusive and exclusive?
Exclusive means GST is added on top of the base price. Inclusive means the GST is already part of the total price and needs to be extracted.
How do I calculate GST from a total price?
GST Amount = Total × GST% / (100 + GST%). This extracts the tax portion from an inclusive price.
Can I use this for VAT too?
Yes, the same calculation applies to VAT or any percentage-based sales tax — just enter the relevant rate.