GST Calculator
Add GST to a price or remove GST from an inclusive price, with CGST and SGST split.
Result
How to use
- 1
Enter the amount.
- 2
Pick the GST rate and whether the amount already includes GST.
- 3
See the GST, CGST/SGST split and the final amount.
Questions
What are the current GST rates?
Since 22 September 2025 (GST 2.0), most goods and services fall under three rates: 5%, 18% and 40%. Gold and jewellery use 3%. The old 12% and 28% slabs were mostly removed — they are kept here for older invoices.
How is GST split?
For sales within a state, GST is split equally into CGST and SGST. For sales between states it is charged as IGST.
How do I remove GST from a price?
Base price = Inclusive price ÷ (1 + GST rate). The difference is the GST amount.
About this GST tool
GST Calculator — Add GST to a price or remove GST from an inclusive price, with CGST and SGST split. It is one of 200 free tools on namasivayam.in, made by software engineer Namasivayam Vadivelan for everyday use in India.
Everything is calculated instantly in your browser: nothing you type or upload is sent to any server, there is no sign-up, and it works on mobile and desktop. Enter the amount.
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Results are estimates to help you plan. They are not financial, tax or medical advice.