GST Calculator

Enter the base amount and select the GST rate (5%, 12%, 18%, or 28%). Choose whether the amount is GST exclusive (GST to be added) or GST inclusive (GST already included). The tool instantly shows the GST amount, CGST, SGST, IGST, and total.

CGST (Central GST) and SGST (State GST) are both charged on intra-state transactions — each is half the total GST rate. IGST (Integrated GST) is charged on inter-state transactions and equals the full GST rate.

The main GST slabs are 5%, 12%, 18%, and 28%. Essential goods like food grains are exempt (0%). Luxury and sin goods attract 28% plus cess.

If the price already includes GST, select 'GST Inclusive'. The tool will back-calculate the original price and the GST component. Formula: GST Amount = Price × Rate ÷ (100 + Rate).

If the price does not include GST, select 'GST Exclusive'. The tool adds GST on top. Formula: GST Amount = Price × Rate ÷ 100.