Is this GST calculator free?

Yes. It is free and runs in your browser.

Does this tool upload my data?

No. Calculations happen locally in your browser.

Yes. You can calculate GST from an exclusive base amount or extract GST from an inclusive total.

Calculate GST inclusive/exclusive and split into CGST/SGST or IGST.

Amount

Enter base amount (before GST).

GST rate (%)

Common: 0, 5, 12, 18, 28

Supply type

Choose how GST should split.

Rounding

For invoices, 2 decimals is typical.

Currency symbol

Affects display only.

Ready. Enter amount and click Calculate.

Taxable value

—

GST total

—

Total value

—

CGST

—

SGST

—

IGST

—

Exclusive → Inclusive: GST = Amount × (Rate/100), Total = Amount + GST
Inclusive → Exclusive: Taxable = Total × 100 / (100 + Rate), GST = Total − Taxable
Intra-state: GST split equally as CGST and SGST.
Inter-state: Entire GST is IGST.

This tool runs in your browser and does not upload any data.