How do I add GST to a price?

Choose 'Add GST', enter the base (pre-tax) amount and the rate. The tool shows the GST amount and the final price including GST.

How do I remove GST from an inclusive price?

Choose 'Remove GST' and enter the total price that already includes GST. The tool works backwards to show the base amount and the GST component.

What are CGST and SGST?

For an intra-state sale, GST is split equally into CGST (central) and SGST (state). For 18% GST, that is 9% CGST + 9% SGST. The tool shows this split automatically.

Which GST rates does it support?

The common Indian slabs: 0%, 3%, 5%, 12%, 18% and 28%.

GST Calculator

Add or remove GST and see the CGST/SGST split, instantly and privately.

Private by design. Everything runs in your browser — your data is never uploaded to or stored on our servers. How we handle data

Amount (₹)

GST rate

Mode

Base amount₹1,000

CGST (9%)₹90

SGST (9%)₹90

Total GST₹180

Total amount₹1,180

Calculate GST in seconds

GST (Goods and Services Tax) applies to most goods and services in India. This calculator works both ways: add GST on top of a base price, or remove GST from a price that already includes it. It also splits the tax into CGST and SGST for intra-state transactions.

How to use it

Enter the amount.
Pick the GST rate (3%, 5%, 12%, 18% or 28%).
Choose whether to add GST (exclusive) or remove it (inclusive).

Handy for shopkeepers, freelancers and small businesses preparing invoices, or for anyone checking the tax portion of a bill.

Frequently asked questions

How do I add GST to a price?: Choose 'Add GST', enter the base (pre-tax) amount and the rate. The tool shows the GST amount and the final price including GST.
How do I remove GST from an inclusive price?: Choose 'Remove GST' and enter the total price that already includes GST. The tool works backwards to show the base amount and the GST component.
What are CGST and SGST?: For an intra-state sale, GST is split equally into CGST (central) and SGST (state). For 18% GST, that is 9% CGST + 9% SGST. The tool shows this split automatically.
Which GST rates does it support?: The common Indian slabs: 0%, 3%, 5%, 12%, 18% and 28%.

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