GST Calculator
Calculate GST at every Indian slab plus the Australian 10%, in either direction. For intra-state supply the total splits evenly into CGST and SGST, which is what an invoice actually has to show, so both halves are worked out for you. Switch the split off for inter-state supply and you get a single IGST line instead.
Intra-state supply in India splits GST evenly between central and state. Inter-state is a single IGST.
Total (inc. GST)
$1,180.00
- Taxable value
- $1,000.00
- GST at 18%
- $180.00
- CGST (9%)
- $90.00
- SGST (9%)
- $90.00
- Total (inc. GST)
- $1,180.00
Nothing is uploaded — this tool runs inside your browser, so your files never leave your device.
Why use this tool
- All Indian slabs — 3%, 5%, 12%, 18% and 28% — plus Australian 10%
- Splits into CGST and SGST for intra-state supply
- Single IGST line for inter-state supply
- Works in both directions: GST-exclusive or GST-inclusive amounts
How it works
- 1Enter the amount and pick the GST slab.
- 2Choose whether the amount already includes GST.
- 3Read the taxable value, the GST, and the CGST/SGST split.
GST Calculator — frequently asked questions
For a supply within one state, GST splits evenly between the centre (CGST) and the state (SGST) — 18% becomes 9% plus 9%. For a supply across state lines, it's a single IGST at the full rate collected by the centre.
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