GST Calculator Online with CGST, SGST, and IGST Breakdown
Add or remove GST in India and see the CGST + SGST or IGST split instantly for 5%, 12%, 18%, 28% and 40% rates.
Written by Anil Gautam · Updated
How do you remove GST from a price that includes it?
Divide the inclusive price by 1 plus the rate. At 18%, ₹11,800 ÷ 1.18 = ₹10,000, so the tax inside the price is ₹1,800. A frequent mistake is to take 18% of the inclusive amount: 18% of ₹11,800 is ₹2,124, which overstates the tax by ₹324 and leaves a base of only ₹9,676. Remove GST mode does the division for you and shows the starting figure as Original (incl. tax).
Results are shown to the paisa. At 5%, an inclusive price of ₹1,000 splits into a base of ₹952.38 and GST of ₹47.62, which appears as CGST ₹23.81 and SGST ₹23.81 on an intra-state sale. An MRP printed on a retail pack already includes all taxes, so Remove GST is the mode for finding the tax inside it.
Why does 18% GST show as 9% CGST and 9% SGST?
For an intra-state sale the tool halves both the rate and the tax, so ₹10,000 at 18% shows CGST (9%) of ₹900 and SGST (9%) of ₹900 on a total of ₹11,800. Choose Inter-state and the same ₹1,800 appears as a single IGST (18%) line. The total payable is identical in both cases; only the split changes.
In a Union Territory without its own legislature, such as Chandigarh or Ladakh, the second half is levied as UTGST in place of SGST. The rate and amount are the same as the SGST line here.
Which GST rates can you use?
The rate buttons are fixed at 5%, 12%, 18%, 28% and 40%, and there is no field for any other rate. The 40% rate covers luxury and sin goods from 22 September 2025; 12% and 28% stay for older invoices. Rates for individual goods and services are notified by the government on the GST Council's recommendation and are revised from time to time, so confirm the current rate for your item before relying on a total. For any other rate, the same formulas apply: multiply by 1 plus the rate to add tax, or divide by it to remove tax. On a bill that mixes items at different rates, calculate each rate separately and add the results.
You can paste an amount as printed on a bill, such as Rs. 1,180 or ₹1,180.50: the field drops a Rs. or ₹ prefix and any commas, keeping only digits and the decimal point. Copy results puts the base, GST and total on your clipboard, without the CGST and SGST split. For a complete tax invoice, the Invoice Generator adds GST to each line, and the GSTIN Validator checks a GSTIN's state code and check digit.