Add or remove GST and see the tax split.
GST slabs have been revised in recent years, and some goods have special rates. Always confirm the rate for your product or service. For sales within a state, GST splits equally into CGST and SGST. For sales between states, the full amount is IGST.
GST is charged as a percentage of the price. To add GST, multiply the net price by one plus the rate. To remove it from a GST-inclusive price, divide by one plus the rate. A common mistake is subtracting the percentage from the total, which gives the wrong answer because GST was calculated on the smaller net amount. The calculator also shows the CGST and SGST halves used within one state. Rates change, so check official notifications.
The tax was calculated on the net price, so 18% of the total would be too much.
IGST applies to supplies between states. It equals the full GST amount, without a CGST/SGST split.