GST calculator
Add GST to a price or take it out of one, at the rates in force since 22 September 2025.
GST rate
This amount
Sale is
This amount at every main rate
| Rate | Before GST | GST | Total |
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How GST is calculated
To add GST: GST = amount × rate ÷ 100. So ₹10,000 at 18% has ₹1,800 GST and comes to ₹11,800.
To take GST out of a price that already includes it: value before GST = price × 100 ÷ (100 + rate). So ₹11,800 at 18% is ₹10,000 before GST.
Current GST rates
Since 22 September 2025 the main rates are 5% and 18%, with 40% on luxury and sin goods and 0% on some essentials. Gold has a special 3% rate, and a few items have other special rates. The older 12% and 28% slabs were removed for most goods, so older guides may be out of date.
Rates are set by the GST Council and can change. Check the rate for your exact HSN or SAC code on the official notification.
Questions
How do I find the rate for my product?
Look up its HSN or SAC code in the official GST rate notifications, or ask your accountant.
What is the difference between CGST, SGST and IGST?
Within a state the GST is split equally between the centre (CGST) and the state (SGST). On a sale to another state it is charged as one tax, IGST.
Are my numbers saved?
No. Everything is worked out in your browser.
