Reverse GST Calculator

⚡ In shortHave a GST-inclusive total and need to find the base price and the GST inside it? This free reverse GST calculator does it instantly for any rate. To remove GST from an inclusive amount, divide the total by (1 + rate/100) to get the base price; the difference is the GST. For example, ₹1,180 at 18% gives a base of ₹1,000 and ₹180 GST (₹90 CGST + ₹90 SGST for an intra-state supply).

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How it is calculated

To remove GST from an inclusive amount, divide the total by (1 + rate/100) to get the base price; the difference is the GST. For example, ₹1,180 at 18% gives a base of ₹1,000 and ₹180 GST (₹90 CGST + ₹90 SGST for an intra-state supply).

Frequently asked questions

How do I remove GST from a total?

Base price = total ÷ (1 + GST rate/100). GST amount = total − base price. The calculator handles 5%, 12%, 18% and 28% rates.

Is GST split into CGST and SGST?

For a sale within the same state, GST is split equally into CGST and SGST. For inter-state sales it is a single IGST at the same total rate.

Which GST rate applies to my product?

It depends on the HSN/SAC classification. Use our free HSN/SAC finder to check, and verify on the GST portal.