Free GST calculator
To add GST, multiply the price by (1 + rate): ₹1,000 at 18% becomes ₹1,180. To remove GST from an inclusive price, divide by (1 + rate). Within a state, the tax is split equally into CGST and SGST; between states it is charged as IGST.
- Net amount
- ₹1,000.00
- CGST (9%)
- ₹90.00
- SGST (9%)
- ₹90.00
- or IGST (18%)
- ₹180.00
- Total
- ₹1,180.00
GST calculator: FAQ
How do I add GST to a price?
Multiply the price by (1 + GST rate). For ₹1,000 at 18% GST: 1,000 × 1.18 = ₹1,180, of which ₹180 is GST.
How do I remove GST from an inclusive price?
Divide the inclusive price by (1 + GST rate). For ₹1,180 at 18%: 1,180 ÷ 1.18 = ₹1,000 before tax.
When is GST split into CGST and SGST?
For sales within the same state, tax is split equally into CGST and SGST. For inter-state sales, the full amount is IGST.
What are the current GST rates?
Since 22 September 2025 the main GST slabs are 5% and 18%, with 40% for a small set of luxury and sin goods, plus nil and special rates for some items.