Is the GST Calculator free to use?

Yes. The GST Calculator on Niyamfin is completely free. All calculations run in your browser — no login, no account, and your inputs are never sent to any server.

How accurate is the GST Calculator?

The GST Calculator uses standard financial formulas (Exclusive: GST = amount × rate%. Inclusive: taxable = amount ÷ (1 + rate%), GST = amount − taxable. Intra-state GST splits equally into CGST and SGST.). Results are illustrative estimates based on the inputs you provide. They are educational in nature and not a substitute for advice from a qualified financial professional.

What assumptions does the GST Calculator use?

Inputs and calculations stay in browser memory only. Uses standard GST slab rates; cess (e.g. on luxury goods) is not included. Educational estimate — verify rates for your goods/services with a GST practitioner.

All calculators

Tax · Client-side estimateData reviewed 2026-07-02

GST Calculator

Calculate GST amount and invoice total, inclusive or exclusive, with CGST/SGST or IGST split.

Tax

Amount

GST rateAmount typeSupply type

Your entries are used only in this browser session. Niyamfin does not store calculator inputs or add analytics trackers.

Formula and assumptions

Exclusive: GST = amount × rate%. Inclusive: taxable = amount ÷ (1 + rate%), GST = amount − taxable. Intra-state GST splits equally into CGST and SGST.

- Inputs and calculations stay in browser memory only.
- Uses standard GST slab rates; cess (e.g. on luxury goods) is not included.
- Educational estimate — verify rates for your goods/services with a GST practitioner.

This calculator is for education and illustration only. It is not financial, investment, tax, insurance, lending, or legal advice. Please consult a qualified professional before making financial decisions.

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HRA Income Tax New vs Old Tax

Educational estimate only — not financial, tax, or investment advice. Niyamfin is not a SEBI-registered investment adviser, IRDAI-licensed insurer, or lender.

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All calculators

Tax · Client-side estimateData reviewed 2026-07-02

GST Calculator

Calculate GST amount and invoice total, inclusive or exclusive, with CGST/SGST or IGST split.

Tax

Amount

GST rateAmount typeSupply type

Your entries are used only in this browser session. Niyamfin does not store calculator inputs or add analytics trackers.

Formula and assumptions

Exclusive: GST = amount × rate%. Inclusive: taxable = amount ÷ (1 + rate%), GST = amount − taxable. Intra-state GST splits equally into CGST and SGST.

- Inputs and calculations stay in browser memory only.
- Uses standard GST slab rates; cess (e.g. on luxury goods) is not included.
- Educational estimate — verify rates for your goods/services with a GST practitioner.

Related calculators

HRA Income Tax New vs Old Tax

Educational estimate only — not financial, tax, or investment advice. Niyamfin is not a SEBI-registered investment adviser, IRDAI-licensed insurer, or lender.