Reverse GST Calculator
Enter any GST-inclusive amount and instantly extract the original price, GST amount, and tax split.
Find base price from total amount
1. Enter the GST-inclusive amount.
2. Select the applicable GST rate.
3. Click Calculate Reverse GST to get the base price and tax split instantly.
Base Amount: Inclusive Amount × 100 ÷ (100 + GST Rate)
GST Amount: Inclusive Amount - Base Amount
CGST: GST ÷ 2, SGST: GST ÷ 2, IGST: GST Amount
How do I calculate reverse GST?
Enter the GST-inclusive amount, choose the GST rate, and calculate to see the original base amount instantly.
What is the reverse GST formula?
Base Amount = Inclusive Amount × 100 ÷ (100 + GST Rate). GST Amount = Inclusive Amount - Base Amount.
Does it show CGST and SGST?
Yes, CGST, SGST, and IGST values are calculated and displayed automatically.
Is this reverse GST calculator free?
Yes, it is free to use on desktop and mobile.