Free Online Tool

GST Calculator

Add GST to a base amount, or remove GST from a GST-inclusive amount. Choose CGST+SGST (intra-state) or IGST (inter-state) to see the split.

Mode
Tax type
Amount (excl. GST) GST Rate
Press Enter in the amount field to calculate.
Base Amount— GST Amount— Total Amount—
CGST— SGST— IGST—

How this works

Add GST: Total = Base × (1 + Rate/100)

Remove GST: Base = Total ÷ (1 + Rate/100)

CGST + SGST (intra-state sale): each is exactly half the total GST rate.

IGST (inter-state sale): the full GST rate applies as a single tax.