Add GST to a price or remove it from a GST-inclusive price. See CGST and SGST for 5%, 12%, 18%, 28% or any rate.
Enter an amount to see the GST.
NinjaFunction's GST Calculator adds GST to a price or takes it out of a price that already includes it. Pick a common rate such as 5%, 12%, 18% or 28%, or type your own, and see the base amount, the GST, the CGST and SGST split and the total. It runs in your browser and stores nothing.
| Rate | Example on ₹1,000 | GST |
|---|---|---|
| 5% | ₹1,000 | ₹50 |
| 12% | ₹1,000 | ₹120 |
| 18% | ₹1,000 | ₹180 |
| 28% | ₹1,000 | ₹280 |
| Task | Formula | Example (18%) |
|---|---|---|
| Add GST | Price + (Price × Rate ÷ 100) | 1,000 → 1,180 |
| Remove GST | Total ÷ (1 + Rate ÷ 100) | 1,180 → 1,000 |
| GST inside a total | Total − Total ÷ (1 + Rate ÷ 100) | 1,180 → 180 |
| CGST or SGST | GST amount ÷ 2 | 180 → 90 each |
If a bill of ₹1,180 includes 18% GST, subtracting 18% of 1,180 (₹212.40) gives ₹967.60, which is wrong. The 18% was added to the original price, not to the total, so you must divide by 1.18 to get back to ₹1,000. This is the most common GST mistake on invoices, and the Remove GST mode avoids it.
When a seller and a buyer are in the same state, the GST is split into two equal parts: CGST goes to the central government and SGST goes to the state. When they are in different states, the whole amount is charged as IGST. The total tax is the same in both cases.
GST amount = price × rate ÷ 100. Add that to the price. For ₹1,000 at 18%, GST is ₹180 and the total is ₹1,180.
Divide the total by (1 + rate ÷ 100). ₹1,180 at 18% gives ₹1,000 before GST. Do not simply subtract 18% of ₹1,180, which gives a wrong answer.
For sales within one state, GST is split equally between the central government (CGST) and the state government (SGST). For sales between states, the full amount is charged as IGST.
The usual slabs are 0.25%, 3%, 5%, 12%, 18% and 28%. Check the current rate for your item, as rates are changed by the GST Council.
No. It does the arithmetic only. Use the rate on your invoice or the government GST portal for filing.