How to Use a GST Calculator: Inclusive vs Exclusive

GST Exclusive

GST Exclusive means the price of the product does not include GST. You add the GST amount on top of this price.

Formula: GST Amount = (Original Cost * GST%) / 100

GST Inclusive

GST Inclusive means the price already includes the GST amount. You need to "reverse-calculate" to find the base price.

Formula: GST Amount = Price - (Price * (100 / (100 + GST%)))