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GST Calculator India

Add GST to a price or remove GST from a GST-inclusive amount at 5%, 12%, 18%, 28%, 40% or any custom rate. See the CGST + SGST or IGST split, add cess, and build a multi-item bill. Runs privately in your browser.

Calculate GST

Result

Total (GST inclusive)
₹0.00

Bill items

Add several items at different rates to get one combined GST total. Saved only in this browser.

ItemRateBaseGST+cessTotal
This is an arithmetic aid, not tax advice. The correct GST rate depends on the HSN/SAC code and the current notification, and invoices follow the rounding rules in the GST law. Check with your CA or the official CBIC/GST portal for filings.
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Private: All calculations run locally in your browser. Nothing is uploaded.

How to calculate GST

Adding GST: GST amount = price × rate ÷ 100, and total = price + GST. For ₹1,000 at 18%: GST ₹180, total ₹1,180.

Removing GST: base price = inclusive price × 100 ÷ (100 + rate). For ₹1,180 at 18%: base ₹1,000, GST ₹180. For ₹5,000 at 12%: base ₹4,464.29, GST ₹535.71.

CGST, SGST and IGST

Within a state the rate is split in half between CGST and SGST (18% = 9% + 9%). Between states the full rate is IGST. The total tax is identical, only the label and split change.

Common GST rates

Since the 22 September 2025 rate rationalisation most items fall under 5% or 18%, with 40% on a short list of sin and luxury goods. Older invoices may still use 12% or 28%. Confirm your product on the official rate schedule.

FAQ

How do I calculate GST on a price?

GST amount = price × GST rate ÷ 100, and the final price = price + GST. Example: ₹1,000 at 18% GST gives GST of ₹180 and a total of ₹1,180. Use the 'Add GST' mode of this calculator for this case.

How do I remove GST from a GST-inclusive price?

Base price = inclusive price × 100 ÷ (100 + GST rate). GST = inclusive price − base price. Example: ₹1,180 at 18% gives a base of ₹1,000 and GST of ₹180. A common mistake is subtracting 18% of ₹1,180 (₹212.40), which is wrong because the rate applies to the base, not the total.

What are the current GST rates in India?

After the GST rate rationalisation effective 22 September 2025, most goods and services are taxed at 5% or 18%, with a 40% rate for a short list of sin and luxury items, plus special low rates such as 0.25% and 3% for items like rough diamonds and gold, and nil rates for exempt items. The older 12% and 28% slabs still apply to invoices raised before the change and some items, so this calculator keeps them selectable. Always check the GST Council notification or the CBIC rate schedule for your exact HSN or SAC code.

What is the difference between CGST, SGST and IGST?

For a sale within one state, GST is split equally between the Centre (CGST) and the state (SGST or UTGST). So 18% becomes 9% CGST + 9% SGST. For a sale between states, the whole rate is charged as IGST (18% IGST). The total tax is the same either way; only the split differs.

How is GST cess calculated?

Cess, where it applies, is charged on top of GST on the same taxable value. This calculator accepts an optional ad-valorem cess percentage that is added to the tax. Some goods have specific-rate or compensation cess rules that differ, so confirm on the notification for your item.

Is my data uploaded anywhere?

No. All GST maths run in your browser. Your bill items stay on your device and are never sent to ITCOH.

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