GST Calculator
Add or remove Goods and Services Tax (GST) from any amount instantly.
Calculation Mode
Amount (₹)
₹
GST Rate (%)
For older invoices (12%, 28%) or special rates
Calculation Details
Initial Amount
₹ 1,000
Base Amount (Excl. GST)
₹ 1,000
CGST (9%)
₹ 90
SGST (9%)
₹ 90
Total GST Amount
₹ 180
Total Amount
₹ 1,180
Estimate for information only, not financial, tax or investment advice. Rates and rules change, so check anything important with a qualified professional or the official source. Terms
How to Calculate GST?
Adding GST:
GST Amount = (Original Cost x GST Rate) / 100
Net Price = Original Cost + GST Amount
Removing GST:
GST Amount = Original Cost - [Original Cost x {100 / (100 + GST Rate)}]
Net Price = Original Cost - GST Amount
GST Slabs in India (from 22 September 2025)
India moved to two main GST rates, 5% and 18%, with a 40% rate for luxury and sin goods, from 22 September 2025. The earlier 12% and 28% slabs were removed for most goods. Examples:
| Slab | Common Items |
|---|---|
| 0% (exempt) | Fresh milk, eggs, fresh fruit and vegetables; individual life and health insurance premiums |
| 3% | Gold and silver, including jewellery |
| 5% | Toilet soap, shampoo, hair oil, toothpaste, bicycles |
| 18% | Mobile phones, cement, air conditioners, small cars, motorcycles up to 350cc, most services |
| 40% | Aerated and caffeinated drinks, pan masala, motorcycles above 350cc |
Rates depend on the exact item or service (its HSN or SAC code), and some products have special rates. Check the current rate on the official CBIC GST site (cbic-gst.gov.in) before issuing an invoice.
Example
A product priced at ₹1,000 (before tax) with 18% GST costs ₹1,180 after tax — ₹180 is the GST amount. Working backwards, a ₹1,180 GST-inclusive price has a base price of ₹1,000.
Common Use Cases
- Adding GST to a base price when creating an invoice.
- Extracting the GST amount from a GST-inclusive price on a receipt.
- Checking which GST slab applies to a product or service.
FAQs
What happened to the 12% and 28% GST rates?
From 22 September 2025, most goods in the 12% slab moved to 5% and most in the 28% slab moved to 18%, while luxury and sin goods moved to 40%. Invoices dated before then used the old rates. To check one, enter the old rate under "Other rate".
What's the difference between CGST, SGST, and IGST?
For sales within a state, GST splits equally into CGST (central) and SGST (state). For inter-state sales, IGST applies instead, going to the central government and then apportioned to the destination state.