Free tool
GST calculator
Add GST to a price, or take it out of one that already includes it. Pick whether the customer is in your state and the split comes out as CGST and SGST, or IGST.
Total with GST
₹11,800.00
- Taxable value
- ₹10,000.00
- CGST @ 9%
- ₹900.00
- SGST @ 9%
- ₹900.00
- Total GST
- ₹1,800.00
- Total
- ₹11,800.00
Runs in your browser. Nothing you type is sent to HindustanBills.
How the figures are worked out
Adding GST is the price times the rate: ₹10,000 at 18% is ₹1,800 of tax and ₹11,800 in all.
Taking GST out of an inclusive price is where most hand calculations go wrong. The taxable value inside ₹11,800 is ₹11,800 × 100 ÷ 118 = ₹10,000. Subtracting 18% of ₹11,800 gives ₹9,676, which is wrong by ₹324.
Within your own state the tax is split half and half into CGST and SGST (UTGST in a union territory). To a buyer in another state it is all IGST. Which applies depends on the place of supply, which for a sale over the counter is your shop's state.
Questions
Asked about this
What GST rate applies to clothing?
Readymade garments, made-ups like bedsheets and towels, and footwear are 5% when one piece (or pair) sells for up to ₹2,500 and 18% above it, from 22 September 2025. The test is the price after your discount, before GST. Fabric is 5% at any price.
When do I charge IGST instead of CGST and SGST?
When the place of supply is in a different state from your registration. A walk-in sale at your counter is supplied in your state, so it is CGST and SGST even if the customer lives elsewhere. A saree couriered to a buyer in another state is IGST.
Is anything I type here saved or sent anywhere?
No. The calculator runs in your browser and makes no request with the figures you enter.
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Let the bill do this sum for you
HindustanBills splits CGST, SGST and IGST on every line as you bill, and files the same figures into your GSTR-1.