Enter an amount, pick a rate, and instantly see the GST, the total, and the CGST/SGST split. Works both ways — add GST to a price, or pull GST out of a total.
GST (Goods and Services Tax) is a percentage added on top of the price of most goods and services in India. The common rates are 5%, 12%, 18% and 28%, depending on the item.
If you have a price before tax, the GST amount is simply that price multiplied by the rate. For example, ₹1,000 at 18% GST adds ₹180, making the total ₹1,180. This calculator does that instantly and also splits the ₹180 into CGST and SGST.
Sometimes you have the final price that already includes GST and want to know the original amount. You can't just subtract the percentage — you divide. For ₹1,180 including 18% GST, the base is ₹1,180 ÷ 1.18 = ₹1,000, and the GST portion is ₹180. Switch to "Remove GST" above to do this.
For a sale within the same state, the total GST is split equally into CGST (central) and SGST (state) — so 18% becomes 9% + 9%. For a sale between different states, it's charged as a single IGST at the full rate instead.
The main GST slabs are 5%, 12%, 18% and 28%. Essentials often fall in lower slabs or are exempt, while luxury and "sin" goods sit at 28%. The right rate depends on the specific good or service.
Divide the total by (1 + rate/100). For 18%, divide by 1.18. The result is the base price, and the difference is the GST. Use the "Remove GST" mode above to do it automatically.
For sales within a state, GST is split into CGST (central government) and SGST (state government), each half the total rate. For sales across states, a single IGST is charged at the full rate.
Yes, completely free with no sign-up. It runs entirely in your browser, so nothing you enter is uploaded or stored.