Free GST Calculator India
Add or extract tax using a rate you enter. Local arithmetic only: this tool does not determine the applicable GST rate or tax treatment.
Why this matters
First establish whether the stated price includes tax and which rate applies. Then use this calculator to add tax to a base or extract it from an inclusive total. The default 18% is an example, not a classification of your goods or services.
This tool shows total tax only. It does not validate registration, place of supply, CGST/SGST/UTGST/IGST treatment, eligibility for credit, cess, or invoice compliance. See the invoice arithmetic worksheet for the questions to check separately.
GST Calculation
Result
Base Amount
₹0
GST Amount
₹0
Total
₹0
Frequently Asked Questions
What is GST?
Goods and Services Tax is an indirect-tax system. Applicable rates and conditions must be checked against official guidance for the actual supply and transaction date; the example rate here is not a current rate determination.
When do I use exclusive vs inclusive?
Exclusive means tax must be added to a pre-tax base. Inclusive means tax is already part of the amount and must be extracted. Do not add tax again to a price that already includes it.
Does this account for CGST/SGST split?
No. It shows total tax arithmetic only. Establish the applicable tax components, place of supply and any cess separately.
Is this calculator official?
This is a math calculator using the standard GST formula. For actual tax filing, use a CA or the GSTN portal.