GST calculator

From 22 September 2025, the main GST rates are 5%, 18% and 40%. At 18%, GST on ₹1,000 is ₹180 (CGST ₹90 and SGST ₹90 within a state), and ₹1,180 including GST is ₹1,000 before GST.

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The amount entered
GST rate

Please choose the rate notified for the goods or services. The CBIC notification shall prevail.

Type of supply

Result

Please complete the details. The result will appear here.

How it is calculated

  1. Adding GST: GST = amount × rate ÷ 100. Amount including GST = amount + GST.
  2. Removing GST: amount before GST = amount × 100 ÷ (100 + rate). GST = amount − amount before GST.
  3. Within a state, GST is split equally into CGST and SGST (or UTGST in a Union Territory). Between states, the whole amount is IGST.
  4. Amounts are calculated in paise and shown to two decimal places.
  5. All calculations are done in your browser. The details you enter are not sent to any server.

Current GST rates

RateUsed for
5%Merit rate
18%Standard rate
40%Special rate for de-merit goods
3%Gold, silver and jewellery
0.25%Rough diamonds and some precious stones
1.5%Cut and polished diamonds and some precious stones

Rates of 12% and 28% no longer apply to most goods from 22 September 2025. This tool does not decide which rate applies to particular goods or services.

Worked examples

Add 18% GST to ₹1,000

Details
₹1,000.00 Excludes GST (add GST), 18%
Result
Before GST ₹1,000.00; GST ₹180.00; including GST ₹1,180.00

Remove 18% GST from ₹1,180

Details
₹1,180.00 Includes GST (remove GST), 18%
Result
Before GST ₹1,000.00; GST ₹180.00; including GST ₹1,180.00

Remove 5% GST from ₹2,100

Details
₹2,100.00 Includes GST (remove GST), 5%
Result
Before GST ₹2,000.00; GST ₹100.00; including GST ₹2,100.00

Add 3% GST to ₹50,000 (gold)

Details
₹50,000.00 Excludes GST (add GST), 3%
Result
Before GST ₹50,000.00; GST ₹1,500.00; including GST ₹51,500.00

Remove 18% GST from ₹999 (odd paise)

Details
₹999.00 Includes GST (remove GST), 18%
Result
Before GST ₹846.61; GST ₹152.39; including GST ₹999.00

Official sources

Applies to: Rates in force from 22 September 2025.

  1. Press Information Bureau, Ministry of Finance: Recommendations of the 56th meeting of the GST Council (3 September 2025)
  2. Central Board of Indirect Taxes and Customs: Notification No. 9/2025-Integrated Tax (Rate), 17 September 2025
  3. Central Board of Indirect Taxes and Customs: IGST e-flier (intra-State and inter-State supplies)

Last reviewed on 26 October 2026.

The rules on this page have been checked against the official sources listed above. The result is for reference. The rules and assessment of the concerned authority shall prevail.