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GST Calculator

Add or remove GST in a tap, with the full tax breakdown.

The amount is before GST — we'll add it on.

₹
%
More options
Total amount
—
Base amount—
GST—
CGST—
SGST—
Total amount—
Calculated on your device. Nothing is sent or saved.

How the GST is worked out

Add GST: the GST amount is the price multiplied by the rate, then added to the price. For ₹1,000 at 18%, GST is ₹180 and the total becomes ₹1,180.

Remove GST: when a price already includes GST, the base is the total divided by (1 + rate). From ₹1,180 at 18%, the base is ₹1,000 and the GST portion is ₹180.

Same state vs different state

For a sale within the same state the GST is split in two — half as CGST and half as SGST. For a sale to another state the whole amount is charged as a single IGST.

  • 5% and 12% — essentials and common goods
  • 18% — the most widely used rate
  • 28% — luxury and select items

Everything runs in your browser; no amounts are uploaded or stored. Always confirm the correct rate for your goods or services.

Frequently asked questions

How do I add GST to a price?

Enter the amount before tax and the GST rate. The calculator instantly shows the GST amount and the total price including GST.

How do I remove GST from an inclusive price?

Switch to Remove GST, enter the GST-inclusive total, and it works out the base price and the GST portion.

What is the difference between CGST, SGST and IGST?

For a sale within the same state, GST is split equally into CGST and SGST. For a sale to another state, the full amount is charged as IGST. Choose the supply type in More options.

Is my data sent anywhere?

No. The calculation runs entirely in your browser; no amounts are uploaded or stored.

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