GST Calculator: Add or Remove GST
Work out the price with GST, or take GST out of a price that already includes it. See the CGST, SGST and IGST split at once.
How to use GST Calculator
- Enter the amount.
- Choose Add GST or Remove GST and pick a rate or type your own.
- Read the tax amount and the CGST and SGST split.
How to add GST
GST amount = price × rate ÷ 100. Price with GST = price + GST amount. For example, a ₹1,000 item at 18% GST costs ₹1,180.
How to remove GST from a price
Price without GST = price with GST ÷ (1 + rate ÷ 100). Choose Remove GST and the tool does it for you.
CGST, SGST and IGST
For a sale inside one state, GST is split equally into CGST and SGST. For a sale between two states, the full amount is charged as IGST.
Which GST rate should I use?
Since 22 September 2025, most goods and services are taxed at 5% or 18%, luxury and sin goods at 40%, and some essentials at 0%. The older 12% and 28% slabs were removed. For an older invoice, type the old rate in the custom box. The exact rate depends on the product or service, so confirm it on the official GST portal or with your accountant.
Frequently asked questions
How do I calculate GST?
Enter the amount, pick the rate and choose Add GST. The GST amount and final price appear immediately.
GST kaise nikale?
Amount likhein, GST rate chuniye aur Add GST ya Remove GST dabaiye. CGST aur SGST alag dikhenge.
How do I remove GST from a total?
Choose Remove GST. The tool divides the total by 1 plus the rate.
Is this an official calculator?
No. It is a helper for quick calculations, so verify important invoices with your accountant.
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