About this tool
Enter a GST-inclusive amount and select the tax rate to instantly extract the base price, CGST, SGST, and total GST component.
Reverse GST formula
Base Price = Inclusive Amount ÷ (1 + GST Rate/100). GST Amount = Inclusive Amount − Base Price.
Frequently asked questions
How to remove GST from a total price?
Divide the inclusive price by (1 + rate/100). For ₹118 at 18%, base = 118/1.18 = ₹100.