GST Calculator
Add or remove GST at any rate.
Runs entirely in your browser — nothing you enter is uploaded or sent to a server.
The result is only right if you apply the correct slab for the item — the main GST rates are now 5% and 18%, with 40% on select luxury and demerit goods. Per-invoice rounding can shift totals by a rupee or two. This isn't tax advice; check the applicable rate and HSN code. Read our full disclaimer.
About this tool
GST (Goods and Services Tax) is India's indirect tax on goods and services. This tool adds GST on top of a base amount, or backs it out of a tax-inclusive price, and shows the CGST/SGST split for a sale within a state (or IGST for inter-state). Following the September 2025 GST 2.0 reform the main slabs are 5% and 18%, with 40% on select luxury and 'sin' goods and 0% on essentials — pick the rate for your item and the tax, split, and gross or net figure appear instantly.
Example
Add 18% GST to ₹1,000 → ₹180 GST (₹90 CGST + ₹90 SGST), gross ₹1,180. Remove 18% from ₹1,180 → base ₹1,000.
How to use
- 1Choose Add GST (from a net amount) or Remove GST (from an inclusive amount).
- 2Enter the amount.
- 3Pick the GST rate.
- 4Read the base, GST, CGST/SGST split, and gross amount.
Features
- Add or remove GST with one toggle.
- One-tap common rates, or type any custom rate.
- Shows the CGST/SGST split for intra-state, or IGST for inter-state.
Frequently asked questions
What are the current GST slabs in India?
Since the September 2025 GST 2.0 reform the main slabs are 5% and 18%, with a 40% rate on select luxury and 'sin' goods (like tobacco) and 0% on many essentials — the older 12% and 28% slabs were largely folded into 5% and 18%. The rate for a specific item depends on its HSN/SAC code.
What's the difference between CGST, SGST, and IGST?
For a sale within a state, GST is split equally into CGST (central) and SGST (state) — 18% becomes 9% + 9%. For an inter-state sale, a single IGST equal to the full GST applies instead.
How do I add GST to a net amount?
GST = amount × rate ÷ 100, and the gross is amount + GST. For example, ₹1,000 at 18% adds ₹180 for a gross of ₹1,180. Use 'Add GST' and the tool also shows the CGST/SGST split.
How do I remove GST from a total price?
Use Remove GST: the base is amount × 100 ÷ (100 + rate), and the GST is the difference. For example, ₹1,180 at 18% gives a base of ₹1,000.
Is this tax advice?
No — it's a quick calculation aid. The figures are only correct if you apply the right rate for your item, and per-invoice rounding can shift a total by a rupee or two. For anything that matters, confirm the rate and HSN code or check with a professional.
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