OmniToolsFree

GST calculator

Add GST to a base amount, or remove it from a tax-inclusive amount. You choose the rate.

  • The rate for a real supply must be checked
  • Runs in the browser

This runs in your browser. What you type is not uploaded by this tool.

Base
₹1,000
GST
₹180
Total
₹1,180

Rates were reviewed on 23 October 2026 against the GST Council September 2025 structure. This does not decide the rate for a supply and it is not tax advice.

How to use it

Three steps

  1. 01

    Enter the amount.

  2. 02

    Pick a listed rate or type one.

  3. 03

    Choose add or remove. Read the disclaimer before you rely on it.

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Questions

Which rates are listed?

Nil, 5%, 18% and 40%, matching the GST Council's September 2025 structure that took effect on 22 September 2025. You can type another rate. This does not decide which rate applies to a supply.

Is this a tax filing tool?

No. It only does the arithmetic. It does not file a return or look up an HSN code.