GST Calculator (India)
Add or remove GST from any amount, with CGST + SGST split for intra-state and IGST for inter-state supplies.
Last updated: August 2026
Price before GST is added.
GST amount
₹180
Gross price
₹1,180
Total with GST
Total to pay
₹1,180
CGST + SGST split
CGST: ₹90 (half) · SGST: ₹90 (half) — same state supply. GST rates are as notified by GST Council; verify current rates for your HSN/SAC code.
How it works
GST = net × (rate ÷ 100). Intra-state: CGST = SGST = GST ÷ 2. Gross to net: net = gross ÷ (1 + rate ÷ 100).
Example: ₹1,000 at 18% → GST ₹180, total ₹1,180 (CGST ₹90 + SGST ₹90).
Frequently Asked Questions
How is GST calculated in India?
GST = value × rate. On a ₹1,000 item at 18%, GST is ₹180 and the total is ₹1,180. For intra-state supplies the tax splits into CGST and SGST (half each); inter-state and imports are charged IGST in full.
What are the GST rates in India?
The main slabs are 0%, 5%, 12%, 18% and 28%. Most goods and services fall under 18%. Essential items like grains and milk are exempt, and the top slab covers luxury goods. Rates are set by the GST Council and can change — always check the current rate for your HSN/SAC code.
How do I remove GST from a price?
To back out GST from a gross amount, divide by (1 + rate/100). For ₹1,180 including 18% GST, the net price is 1180 ÷ 1.18 = ₹1,000. Switch the calculator to 'With GST' mode to do this automatically.
What is the difference between CGST, SGST and IGST?
CGST (Central GST) and SGST (State GST) are two halves of the same tax, both paid for intra-state sales. IGST (Integrated GST) is the full tax paid for inter-state sales or imports, later shared between the Centre and the state.