Online GST Calculator (India)
Calculate Inclusive & Exclusive GST instantly. Get exact CGST, SGST, and IGST breakdowns for official CBIC tax slabs with zero server storage.
Live HSN & SAC Code Rate Finder
Search by product, service name, or HSN code to find official GST rates instantly.
| HSN / SAC | Goods or Services Description | Category | GST Rate |
|---|
Multi-Item Quick GST Bill Calculator
Add multiple goods or services with different GST rates to calculate the complete composite bill.
Mathematical Mechanics of GST Calculation
The Goods and Services Tax (GST) is a destination-based, multi-stage indirect tax levied on the supply of goods and services in India. Calculating GST accurately requires understanding whether the quoted price is tax-exclusive (pre-tax base) or tax-inclusive (post-tax retail price).
1. GST Exclusive Formula (Adding GST)
When the stated price does not include tax, GST is calculated by applying the statutory tax rate directly to the net taxable base:
Gross Price = Base Amount + GST Amount
2. GST Inclusive Formula (Extracting / Reverse GST)
When an item is sold as "inclusive of all taxes" (MRP), the tax amount embedded inside the gross price is extracted using reverse division:
Net Base Amount = Gross Price - GST Amount
Official Indian GST Slabs & Item Classification Reference (2026)
| GST Rate | CGST (Central) | SGST (State) | IGST (Interstate) | Typical Goods & Services |
|---|---|---|---|---|
| 0% | 0% | 0% | 0% | Fresh fruits, vegetables, unprocessed milk, salt, natural honey, judicial papers, unbranded grains. |
| 3% | 1.5% | 1.5% | 3% | Gold, silver, platinum jewelry, and semi-precious stones. |
| 5% | 2.5% | 2.5% | 5% | Packaged pulses, edible oil, spices, life-saving medicines, tea, domestic LPG, economy flight seats. |
| 12% | 6.0% | 6.0% | 12% | Computers, processed food items, butter, ghee, fruit juices, apparel priced above ₹1,00,0. |
| 18% | 9.0% | 9.0% | 18% | IT software, telecom, consulting, restaurants in non-star hotels, hair oil, soap, branded apparel. |
| 28% | 14.0% | 14.0% | 28% | Automobiles, high-end motorbikes, air conditioners, refrigerators, tobacco products, carbonated beverages. |
Frequently Asked Questions (FAQ)
A GST Exclusive price is the raw base cost of a product or service without tax. The tax is calculated and added on top of this amount. A GST Inclusive price is the final consumer price that already has the GST tax component included inside it (e.g., retail MRP).
The determining factor is the Location of the Supplier versus the Place of Supply. If both are situated within the same Indian state or union territory (Intrastate), equal parts of Central GST (CGST) and State GST (SGST) apply. If the supplier and place of supply are in different states (Interstate), Integrated GST (IGST) is charged entirely.
Yes, 100%. Unlike conventional web calculators that transmit input data to remote servers or third-party analytical endpoints, the XESTUS Suite executes all math logic locally in your browser's JavaScript engine. It is physically impossible for our servers to store or inspect your figures.
Yes. Enter 3% in the "Custom rate" input box. Gold, silver, and precious stones are taxed at a special 3% rate under Indian GST rules, split as 1.5% CGST and 1.5% SGST for intrastate purchases.