GST Calculator
To add GST, multiply by (1 + rate ÷ 100); to remove it, divide by that. ₹1,000 plus 18% GST is ₹1,180, and ₹1,180 including GST has ₹180 tax. ClickZM splits the tax into CGST + SGST or IGST.
Results are estimates for planning, not financial or tax advice. How we source rates
- Free
- No signup
- Runs in your browser
How to use GST Calculator
- 1Type or paste your input into the GST Calculator.
- 2Choose any options you need.
- 3See the result update instantly.
- 4Copy the result or download it.
How the GST Calculator works
To add GST the calculator multiplies the price by (1 + rate ÷ 100); to remove it, it divides the GST-inclusive price by the same factor. For a sale within one state the tax is split equally into CGST and SGST; for a sale between states it is shown as IGST.
The rate depends on the HSN or SAC code of the goods or service, and the GST Council sets and revises the rates. Check the current rate for your item before you issue an invoice.
Often used with: Income Tax Calculator, Loan EMI Calculator, SIP Calculator
Sources: GST Council · GST portal
GST Calculator: questions people ask
What are the GST slabs?
From 22 September 2025 the main rates are 5% and 18%, with 40% for sin and luxury goods, plus special rates such as 0.25% and 3%.
CGST/SGST or IGST?
Sales within a state split the tax equally into CGST and SGST; sales between states pay IGST.
Is my data uploaded when I use the GST Calculator?
No. The GST Calculator runs entirely in your web browser, so your text and numbers stay on your device and work even on a slow connection.
Does the GST Calculator work on iPhone, Android and Mac?
Yes. The GST Calculator runs in any modern browser (Safari, Chrome, Edge or Firefox) on iPhone, iPad, Android phones, Mac, Windows and Chromebook. There is no app to install.
Is the GST Calculator free?
Yes. The GST Calculator is free with no signup, no watermark and no daily limit.
Which GST rates should I use in 2026?
Since 22 September 2025 the main rates are nil, 5% and 18%, with 40% on listed luxury and sin goods. Gold is generally 3%. The old 12% and 28% slabs no longer apply to most goods. Always match the HSN or SAC on the tax invoice.
What is the difference between exclusive and inclusive?
Exclusive means the amount you type is before GST, so tax is added on top. Inclusive means the amount already contains GST, and the calculator backs out the taxable value. CGST and SGST are each half of the total for a supply inside one state. A supply to another state is IGST for the full rate.