GST Calculator India - Add or Remove GST Online

Work out GST on any amount instantly. Add GST: total = base x (1 + rate/100). Remove GST: base = total / (1 + rate/100). For example, an 18% GST inclusive price of Rs 1,180 means a base of Rs 1,000 and GST of Rs 180. Pick a slab (5%, 12%, 18%, 28%) or enter a custom rate - this free tool shows the base, GST and total side by side for business and personal use.

🧾 GST Parameters

Enter the amount, pick the GST slab and choose whether your price already includes GST (inclusive) or not (exclusive). Results update in real time.

₹
%
🧾 GST Included
₹180
-
₹0
Base Price
₹0
GST Amount
₹0
Total

📊 Same Amount at Every Slab

Remove-GST breakdown of this amount at each standard slab:

SlabBase PriceGSTCheck

Handy for invoices: find which slab reproduces your inclusive total exactly.

❓ GST Calculator FAQ
How do I remove GST from an inclusive price?

Divide the inclusive total by (1 + rate/100). For an 18% inclusive price of 1,180: base = 1,180 / 1.18 = 1,000, GST = 180. Select "Remove GST (inclusive)" above and the calculator does it for any amount and slab.

What are the current GST slabs?

The main slabs are 5%, 12%, 18% and 28%. A 0.25% rate applies to rough diamonds and 3% to gold jewellery. Essentials sit at 0-5%, most services at 18%, and luxury/demerit goods at 28% plus cess where applicable.

Exclusive vs inclusive: which should businesses invoice?

Business-to-business invoices are typically GST-exclusive (the buyer adds GST and may claim Input Tax Credit on it). Consumer-facing prices are GST-inclusive (what you see is what you pay). The same base price produces the same GST either way.

Can I claim back GST paid on purchases?

Yes - GST-registered businesses claim Input Tax Credit (ITC) on GST paid for business purchases and offset it against output GST collected. Keep proper invoices; ITC claims require the supplier to have filed their returns.

⚠️ Disclaimer

GST slabs change with Council notifications, and specific goods or services may attract cess. This tool is for information only - verify applicable rates with a GST practitioner or the CBIC website before filing.