GST calculator: add or remove GST, CGST SGST IGST

Free GST calculator for India: add GST to an amount or take it out of a price, at 0%, 3%, 5%, 12%, 18% or 28%, with the CGST, SGST or IGST split.

Adding GST: GST = amount × rate ÷ 100. For ₹1,000 at 18%, GST is ₹180 and the total is ₹1,180.

Removing GST: amount before GST = price × 100 ÷ (100 + rate).

Within a state GST splits into CGST and SGST; between states it is IGST.