GST Calculator
Calculate GST on any amount — inclusive or exclusive, 5% / 12% / 18% / 28%.
About this tool
Whether a price already includes GST or you need to add it, this calculator handles both directions. Type the amount, pick the slab, and see the base, GST, and total instantly — with CGST + SGST or IGST split shown.
Frequently asked questions
What is GST inclusive vs exclusive?
Exclusive means the amount you enter does not include GST — the calculator adds it. Inclusive means GST is already baked in — the calculator strips it out to show the base price.
When is CGST + SGST used and when is IGST?
CGST + SGST split (half of the slab each) applies to intra-state supplies. IGST (the full slab as one tax) applies to inter-state or export supplies. This calculator shows both formats.
What are the current GST slabs?
The four active slabs are 5%, 12%, 18%, and 28%. A few essentials sit at 0%. Choose the slab that applies to your product or service.