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GST Calculator

₹
GST rate

Most goods and services; the other main rate Rates changed on 22 September 2025 (“GST 2.0”): most goods and services are now 5% or 18%, with 40% on luxury and sin goods. Check the GST notification for your item.

%
Discount, cess and round-off

Discount (taken off before GST)

%

Total ₹1,180.00

Net amount

₹1,000.00

GST

₹180.00

CGST

₹90.00

SGST

₹90.00

Gross amount

₹1,180.00

Putting it on a bill? Invoice Generator, or write the total in words with Number to Words.

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  • No Watermarks

Nothing is uploaded. Just open it and start.

A GST calculator with the CGST and SGST split

Free, no sign-up, no credit card, no trial. Add GST to a net amount or remove it from a tax-inclusive price, at the current rates or your own, for one amount or a whole list of items.

Add or remove GST

Work forward from a net amount or back out GST from a tax-inclusive price — switch with one tap.

Current GST rates, one tap away

Buttons for the current 0%, 5%, 18% and 40% rates and the special 0.25% and 3%, the old 12% and 28% for earlier invoices, and a custom rate.

CGST/SGST or IGST, invoice-correct

Equal halves, totals that add up to the paisa, several items with a per-rate summary, cess, discount and round-off.

100% private

Every calculation happens in your browser. Nothing is uploaded.

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Frequently asked questions

How do I add GST to a price?
Choose "Add GST" mode and enter the amount excluding tax. The calculator multiplies it by (1 + rate ÷ 100) to get the gross amount — for example, ₹1,000 at 18% GST becomes ₹1,180, with ₹180 of that as GST.
How do I remove GST from a tax-inclusive price?
Choose "Remove GST" mode and enter the gross (tax-inclusive) amount. The calculator divides it by (1 + rate ÷ 100) to back out the net amount — so ₹1,180 at 18% GST reveals a ₹1,000 net amount and ₹180 of GST, not ₹1,180 × 18%.
What do CGST, SGST, and IGST mean?
For a sale within one state, GST is split evenly between Central GST (CGST) and State GST (SGST), each half the rate. For a sale between two states, the whole amount is charged as one Integrated GST (IGST). Pick "Same state" or "Other state" above the amount and the calculator shows CGST + SGST or IGST. The two halves are always equal, as on a GST invoice, so an odd paisa goes into the total rather than making one half bigger.
What are the GST rates now?
On 22 September 2025 ("GST 2.0") the 12% and 28% slabs were removed for most items. The main rates are now 5% and 18%, with 40% on luxury and sin goods, 0% for nil-rated and exempt supplies, and the special rates of 0.25% (rough precious stones) and 3% (gold, silver and jewellery). The 12% and 28% buttons are kept, marked "old", for checking earlier invoices. Which rate applies to a particular item is set by the GST notification, so check it for yours.
How are the paise rounded?
Each tax head is rounded to the paisa, half up, and the net amount, tax and total are kept as whole paise, so net + GST + cess always equals the total exactly. When you remove GST, the parts always add back up to the amount you entered. Several items are rounded line by line and the totals are the sums of the lines, which is how an invoice adds up.
Can I add a discount, cess or round-off?
Yes, under "Discount, cess and round-off". A discount (a percentage or an amount) comes off the price before GST is worked out, because a trade discount lowers the taxable value. A compensation cess is added on the taxable value. Round-off brings the total to a whole rupee and shows the difference, which is at most 50 paise either way.
Can I work out several items at different rates?
Yes. Choose "Several items", add a row for each item with its amount and rate, and you get a summary by rate (taxable value, CGST and SGST or IGST, and total) plus the invoice totals. "Copy the breakdown" puts it on the clipboard as text, and "Copy link" saves all your numbers in a link.
What about a credit note or a refund?
Enter a negative amount. The tool treats it as a credit note and every figure comes out negative, with the same rounding.
Which currencies can I use?
Toggle between ₹ and $ with the currency switch. Rupees use Indian digit grouping and the CGST, SGST, IGST and cess split; dollars show a single "Tax" line, because those labels are Indian terms.
Is my data stored or uploaded anywhere?
No. Every calculation runs locally in your browser and your last inputs are saved only to this browser's local storage for convenience — nothing is ever sent to a server.
Is the GST calculator really free?
Yes — nothing to pay, nothing to register for, no watermark.
Do I need to create an account?
No. There's no account system at all. Open the page and start typing.

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