Free GST Calculator Online India — Any Rate, Any State

GST (Goods and Services Tax) is added on most sales, but two things trip people up: whether a price already includes GST (inclusive) or GST is added on top (exclusive), and whether the sale is within a state (split into CGST + SGST) or across states (a single IGST). Getting the split right matters for invoicing and returns. Enter an amount and rate and this tool computes the correct GST and total for either case.

Frequently Asked Questions

What is the difference between exclusive and inclusive GST?
Exclusive adds GST on top of the base amount (you pay base + tax). Inclusive means the GST is already embedded in the total — the tool extracts it.
What is the difference between CGST+SGST and IGST?
Intra-state transactions split the tax between Central GST and State GST. Inter-state transactions charge a single Integrated GST (IGST).
Is this valid for all GST slabs?
Yes — you can enter any GST rate. The most common are 5%, 12%, 18%, and 28%.