GST calculator
Add GST to a price, or find the price before GST inside an amount that already includes it. See the tax split as CGST and SGST for a sale within your state, or IGST for a sale to another state.
Result
- Price before GST (taxable value)
- ₹1,000.00
- CGST at 18% ÷ 2
- ₹90.00
- SGST / UTGST at 18% ÷ 2
- ₹90.00
- Total GST
- ₹180.00
- Price with GST
- ₹1,180.00
For general information only. This calculator does arithmetic on the rate you choose; it does not tell you which rate applies to your goods. Check rates in our HSN and GST rate list and confirm with your CA.
How to use it
- Enter the amount.
- Say whether it is before GST (exclusive) or already includes GST (inclusive, like an MRP).
- Pick the GST rate, and whether the sale is within your state or to another state.
- Read the taxable value, the tax split and the total. Copy the link to share the same working.
Questions people ask
How do I add GST to a price?
Multiply the price by the rate and add it: at 18%, ₹1,000 becomes ₹1,000 + ₹180 = ₹1,180. Within your state the ₹180 is split as ₹90 CGST and ₹90 SGST; to another state it is ₹180 IGST.
How do I remove GST from an MRP or inclusive price?
Divide by (100 + rate) and multiply by 100: at 5%, ₹1,050 inclusive is ₹1,050 × 100 ÷ 105 = ₹1,000 before GST, with ₹50 of GST inside it.
When is it CGST and SGST, and when IGST?
When the supplier and the place of supply are in the same state (or union territory), the tax is split equally into CGST and SGST (or UTGST). When they are in different states, the whole tax is IGST.
Which GST rates apply now?
Since 22 September 2025 (GST 2.0) the main slabs are 0%, 5%, 18% and 40%, with 3% on gold and silver and special lower rates for a few goods such as diamonds. Older invoices may show 12% or 28%; enter any rate under “Other”.
How is the tax rounded?
This calculator works in paise and rounds each tax half up, the way MudraERP bills do. Within a state the tax is split so CGST and SGST add up exactly to the total tax. Your invoice may round the grand total to the rupee.
Bills that do this maths for you
MudraERP puts the right GST, HSN and state on every invoice and prepares GSTR-1 and GSTR-3B from them. We set up your account for your trade, usually within a working day.