Finance Calculators
GST Calculator
Add or remove GST at any Indian rate and see the base amount, GST, CGST, SGST and final price.
About the GST Calculator
The GST calculator makes Indian Goods and Services Tax simple. Enter an amount and rate to either add GST to a base price (exclusive) or extract GST from a total that already includes it (inclusive).
It also splits the GST into CGST and SGST halves, which is handy for invoicing and bookkeeping.
How to use the GST Calculator
- Choose Add GST or Remove GST.
- Enter the amount.
- Select the GST rate.
- Click Calculate GST.
How the calculation works
Add GST: GST = Amount × rate% · Total = Amount + GST
Remove GST: Base = Amount ÷ (1 + rate%)
Remove GST: Base = Amount ÷ (1 + rate%)
Example
Adding 18% GST to ₹1,000 gives ₹180 GST (₹90 CGST + ₹90 SGST) and a total of ₹1,180.
Frequently asked questions
The common Indian slabs: 3%, 5%, 12%, 18% and 28%.
Exclusive means GST is added on top of the price; inclusive means the price already contains GST, which the tool extracts.
For intra-state supplies, GST is split equally into Central GST and State GST. The calculator shows each half.
Yes, it gives the base, tax and total figures you need for GST invoices and quick checks.