GST Calculator
Add GST to a base price or pull it out of an inclusive price, with the CGST / SGST split.
Total amount
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Frequently asked questions
What are the GST slabs in India?
Since the GST 2.0 reform on 22 September 2025, India uses mainly two rates — 5% and 18% — plus a 40% rate for luxury and sin goods (and a few essentials at 0%). This replaced the earlier 5%, 12%, 18% and 28% structure. 18% is the standard rate for most goods and services.
What does "add GST" vs "remove GST" mean?
Add GST starts from a base (pre-tax) amount and adds tax on top. Remove GST starts from a final (tax-inclusive) amount and works backwards to find the base amount and the tax inside it.
How is GST removed from an inclusive amount?
Base amount = Inclusive amount × 100 / (100 + GST rate). The GST is then the difference between the inclusive amount and the base amount.
What is CGST and SGST?
For sales within a state, GST is split equally into CGST (central) and SGST (state) — so 18% = 9% + 9%. For inter-state sales it is a single IGST.