GST Calculator
Add GST to a price or remove GST from an inclusive price at 5%, 18%, 40% or any rate, with the CGST and SGST split. Free GST calculator for India.
- GST amount
- ₹180.00
- CGST
- ₹90.00
- SGST
- ₹90.00
- Amount before tax
- ₹1,000.00
GST rates and the CGST/SGST split
Since the GST reforms of 22 September 2025, most goods and services in India fall into two main slabs, 5% and 18%, with a 40% rate for luxury and sin goods and special rates such as 3% on gold. To add GST, multiply the price by (1 + rate). To remove GST from an inclusive price, divide by (1 + rate): ₹1,180 including 18% GST is ₹1,000 plus ₹180 GST. For sales within one state, GST is split equally into central (CGST) and state (SGST) tax; sales between states are charged IGST at the full rate.
How to use it
- 1
Choose add or remove
Add GST to a base price, or remove it from a price that includes GST.
- 2
Enter the amount and rate
Tap a common rate or type your own.
- 3
Read the breakdown
See the GST amount, CGST and SGST, and the final price.
Frequently asked questions
How do I calculate GST from the total amount?
GST = total × rate ÷ (100 + rate). For ₹1,180 at 18%: 1,180 × 18 ÷ 118 = ₹180.
What are CGST, SGST and IGST?
For sales within a state, GST is split half and half between the centre (CGST) and the state (SGST). For sales between states, the full rate is charged as IGST.
Which GST rate applies to my product?
It depends on the item's HSN or SAC code. Check the GST Council's rate notifications or the GST portal, as rates are revised from time to time.
Is anything sent to a server?
No. Everything is calculated in your browser, and nothing you type is stored or sent anywhere.