Reverse GST Calculator
Updated July 2026
Enter a GST-inclusive amount and rate to instantly extract the base price and the GST component — with CGST/SGST split.
Reverse GST Calculator
Enter an inclusive amount to see a live breakdown…
Frequently Asked Questions
How do I calculate the base price from a GST-inclusive amount?
Base Price = Inclusive Amount ÷ (1 + GST Rate/100). For example, at 18% GST, divide the inclusive amount by 1.18 to get the base price.
Why is this different from the main GST Calculator?
The main GST Calculator also supports this via its "Remove GST" toggle — this page is a dedicated, faster version for when you only need to extract the base price and GST amount from a total.
Does this work for all GST slabs?
Yes — select any current slab (0%, 5%, 18%, 40%) or special rate (3% gold, 0.25% rough diamonds), plus the legacy 12%/28% rates for reconciling older invoices.