Free tool · Tax
GST Calculator
Add GST to a base price, or remove GST from a GST-inclusive amount. We show the tax and the CGST + SGST (within a state) or IGST (between states) split.
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Frequently asked questions
When is CGST + SGST charged instead of IGST?
For supplies within the same state, GST is split equally into CGST and SGST. For supplies between states, IGST is charged.
How do I remove GST from an inclusive price?
Divide the inclusive amount by (1 + rate). For 18%: ₹1,180 ÷ 1.18 = ₹1,000 base and ₹180 GST.
Which GST rates apply?
Most goods and services fall under the main slabs (such as 5% and 18%), with special rates for some items. Check the current rate for your HSN/SAC code on the GST portal.
Estimates only, based on the inputs you enter. Not financial, tax or legal advice. Your numbers stay in your browser.