Free Online GST Calculator - Calculate Goods and Services Tax

What is GST?

Goods and Services Tax (GST) is an indirect tax used in many countries on the supply of goods and services. It is a comprehensive, multistage, destination-based tax.

How to Use This Calculator

This tool helps you in two ways:

• Add GST (Exclusive): If you have a net price and want to add tax to it. For example, a product costs $100 + 18% GST. The calculator will show you the tax amount ($18) and the total price ($118).
• Remove GST (Inclusive): If you have a final price that already includes tax and want to know the original price. For example, you paid $118 which includes 18% GST. The calculator will extract the tax ($18) and show you the pre-tax price ($100).

Formulas Used

Adding GST:
GST Amount = (Original Cost × GST%) / 100
Net Price = Original Cost + GST Amount

Removing GST:
GST Amount = Original Cost - (Original Cost × (100 / (100 + GST%)))
Net Price = Original Cost - GST Amount