GST Calculator

NEW

Add GST to a price or take it out of a GST-inclusive one, using the GST 2.0 slabs effective September 2025.

How to use GST Calculator

  1. Enter an amount.
  2. Pick a GST rate — 0%, 5%, 18% or 40%.
  3. Toggle "Amount is GST-inclusive" if your amount already includes GST.
  4. The base amount, GST and total are calculated automatically.

Frequently asked questions

Which GST rates can I choose from?

The GST 2.0 slabs effective September 22, 2025 — 0%, 5%, 18%, and 40% — selected via buttons rather than typed in freely. The old 12% and 28% slabs were largely folded into 5% and 18%; 40% is a new rate for select luxury and sin goods.

What does the "GST-inclusive" toggle change?

Off, it treats your amount as the base price and adds GST on top. On, it treats your amount as the final price and works backward — GST = amount × rate ÷ (100 + rate) — to pull the tax back out of it.

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