Calculator
GST Calculator
Calculate GST (CGST + SGST or IGST) on any amount using the latest rates — 0%, 5%, 18%, or 40%. See the tax breakdown and total amount inclusive of GST.
Last updated 7 October 2026
How this works
Calculate GST (CGST + SGST or IGST) on any amount using the latest rates — 0%, 5%, 18%, or 40%. See the tax breakdown and total amount inclusive of GST.
The calculator takes 2 inputs (base amount (₹), gst rate) and produces 6 outputs (base amount, cgst, sgst, total gst, total amount (incl. gst), rate applied (%)). All formulas are published below — no hidden assumptions, no sign-up wall, no data sent to a server.
Initial result (using default inputs):
- Base amount
- 10000
- CGST
- 1800
- SGST
- 1800
- Total GST
- 3600
- Total amount (incl. GST)
- 13600
- Rate applied (%)
- 18