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GST Calculator is free — no account needed.It is one of 29 tools inside MNB Cortex, which watches your receivables and deadlines and emails you before they cost you money.Check your own numbersPlans from ₹799

GST Calculator

Add or strip GST, with the CGST/SGST/IGST split

Base amount
₹10.0K
GST
₹1.8K
CGST + SGST
₹900 + ₹900
Total
₹11.8K
Adding 18% GST to ₹10.0K gives ₹11.8K — of which ₹1.8K is tax, split ₹900 CGST + ₹900 SGST.

Rates current for GST 2.0 · effective 22 September 2025. Rate depends on the HSN/SAC of what you are selling — check the classification before invoicing.