GST Calculator
Add or remove GST and see the CGST, SGST, and net amount instantly.
About This Tool
The GST Calculator works out Goods and Services Tax for India in both directions. In Add mode it treats your amount as the pre-tax base and adds GST to give the final price. In Remove mode it treats your amount as GST-inclusive and extracts the base and tax. It also splits the tax into CGST and SGST, each half of the total GST for intra-state transactions.
Calculations run in your browser at the rate you select (5%, 12%, 18%, 28%, and more).
- check_circleAdd GST to a base amount or remove it from a total
- check_circleSupports 0.25%, 3%, 5%, 12%, 18%, and 28% rates
- check_circleSplits tax into CGST and SGST
- check_circleInstant, browser-based calculation
Adding vs removing GST — the two calculations
Adding GST is straightforward: an 18% rate on a ₹1,000 base price gives ₹180 tax and a ₹1,180 invoice total. Removing GST is where people slip up: if a price of ₹1,180 already includes 18% GST, the tax is not 18% of ₹1,180. The base is 1180 ÷ 1.18 = ₹1,000, and the GST inside is ₹180. Reverse-calculating this way matters whenever you quote "inclusive" prices to customers but need the taxable value for invoices, or when you claim input tax credit on an inclusive receipt. This calculator does both directions and shows the CGST/SGST split for intra-state sales, where the tax divides equally between centre and state (9% + 9% on an 18% supply); inter-state sales charge the full amount as IGST instead.
Indian GST rate slabs at a glance
| GST slab | Typical goods and services |
|---|---|
| 0.25% | Rough precious and semi-precious stones |
| 3% | Gold, silver, and jewellery |
| 5% | Essential items, packaged food, economy transport |
| 12% | Processed foods, business-class travel, some appliances |
| 18% | Most services, electronics, restaurants (standard rate) |
| 28% | Luxury goods, automobiles, aerated drinks |
Frequently Asked Questions
What is the difference between adding and removing GST? expand_more
Adding GST assumes your amount is the pre-tax price and adds tax on top. Removing GST assumes your amount already includes tax and works out the original base and the tax inside it.
What are CGST and SGST? expand_more
For sales within a state, GST is split equally into Central GST (CGST) and State GST (SGST). Each is half of the total GST shown.
Which GST rates are supported? expand_more
The common Indian slabs of 0.25%, 3%, 5%, 12%, 18%, and 28% are all available.