Loading your tools
Getting the page ready. This should only take a moment.
Loading your tools
Getting the page ready. This should only take a moment.
Money & CalculatorsFree online tool
Add GST to a price or remove it from a GST-inclusive total, with the CGST, SGST and IGST split for rates such as 5% and 18%.
Quick answer: To add GST, multiply the price by the rate and add it: ₹1,000 at 18% is ₹180 GST, so ₹1,180 in total. To remove GST from an inclusive price, divide by 1 plus the rate: ₹1,180 ÷ 1.18 = ₹1,000.
Calculator results are estimates. Check important financial, tax or market figures against the relevant current official source or professional advice.
Enter the values you want to calculate, then review the estimate below.
Use the controls above, check the result, then copy or download it when available.
Adding GST: GST amount = price × rate ÷ 100, and total = price + GST. Removing GST: price before GST = inclusive price ÷ (1 + rate ÷ 100), and GST amount = inclusive price - price before GST.
For a sale within one state, GST is split equally into CGST and SGST, each half of the rate. For a sale between states it is charged as IGST at the full rate. The total tax is the same either way, and the calculator shows the split.
| Price before GST | ₹1,000 |
|---|---|
| GST rate | 18% |
| GST amount | ₹180 (CGST ₹90 + SGST ₹90 within a state) |
| Total with GST | ₹1,180 |
| Working backwards | ₹1,180 ÷ 1.18 = ₹1,000, so the GST in it is ₹180 |
After the GST rate changes of 22 September 2025, most goods and services fall under 5% or 18%, with 40% for a small set of luxury and sin goods and special rates such as 3% for gold and silver. The rate depends on the exact item or service, so check the official rate finder or your invoice rather than guessing.
Do not take 18% of an inclusive price to find the GST in it: 18% of ₹1,180 is not the GST. Use the division method above. GST is charged on the taxable value, which can include some extra charges depending on the transaction, so follow your invoice or ask your accountant for anything beyond a simple estimate.
Last reviewed 24 October 2026. The example figures use the same formulas as the calculator. Results are estimates for general information and are not financial, tax or legal advice.
Yes. Select Remove GST, enter the GST-inclusive amount and choose the applicable rate to see the base price and the GST portion.
Use this tool whenever you need: Quick invoice checks, price comparisons and understanding the tax portion of a quoted amount. It offers a fast, client-side workflow without sign-ups, installation or complex software.
Yes. All processing executes locally in your browser using client-side JavaScript. Your inputs, files and calculations remain private and are never uploaded to our servers.
Confirm the applicable GST rate and whether the displayed price already includes tax. Important note: It does not determine whether a transaction is taxable, which rate applies, or how input tax credit should be handled.
Multiply the amount by 0.18 to get the GST and add it to the amount. On ₹1,000 that is ₹180 GST and ₹1,180 in total.
Divide by 1 plus the rate. At 18%, divide by 1.18: ₹1,180 becomes ₹1,000 and the GST is ₹180.
CGST and SGST are the central and state parts of GST on a sale within one state, each half of the rate. IGST is the single tax on a sale between states. The total is the same.
Use the GST rate finder on the CBIC website, or check your invoice, because the rate depends on the exact goods or service.
Calculate GST on an amount
Add GST to a price or work backwards from a GST-inclusive total.
Quick amount
Common GST rates
Base amount
₹1,000.00
GST
₹180.00
Total
₹1,180.00
CGST @ 9%
₹90.00
SGST / UTGST @ 9%
₹90.00
This is a simple GST estimate. Actual tax treatment can depend on the transaction, place of supply, applicable rate and other GST rules. This calculator does not determine whether a transaction is taxable. The applicable rate depends on the HSN/SAC code of the goods or service; since 22 September 2025 most items use 5% or 18%, with 40% for specified goods. Within a state, GST is split equally between CGST and SGST (UTGST in union territories); between states, the full amount is IGST. This is not legal or tax advice.