INV
No signupGST Invoice Generator
Build a GST-compliant invoice with line items, HSN codes, and tax breakup - then print or save as PDF.
Open toolGST
GST Calculator
Add or remove GST from any amount, with CGST/SGST or IGST split.
How to use it
Enter an amount, choose whether it includes tax, set the rate and select the tax split.
When it helps
Compare tax-exclusive quotes with tax-inclusive selling prices.
Worked example
At a custom 10% rate, a base of 1,000 gives tax of 100 and a total of 1,100.
Assumptions and privacy
Calculations run in your browser. Results are estimates based on your inputs and the model shown, with rounding differences possible. They do not replace a lender quote, payroll review, tax filing or professional advice. Confirm rates and rules for your situation before using the result.
About this calculator
A GST calculator works out the tax component of an amount either way round: add GST on top of a base price, or pull GST back out of a price that already includes it. It also splits the tax into CGST + SGST for sales within the same state, or IGST for interstate sales.
Good to know
Frequently asked questions
What's the difference between adding and removing GST?
Adding GST (exclusive) treats your entered amount as the base price and adds tax on top. Removing GST (inclusive) treats your entered amount as the final price and works backward to find the base price and tax already baked in.
When do I use CGST + SGST vs IGST?
CGST + SGST applies when the buyer and seller are in the same state - the GST amount is split equally between the two. IGST applies for interstate sales, where the full GST amount goes under one head.
What GST rates does this support?
The common slabs - 5%, 12%, 18%, and 28% - plus any custom rate you type in.
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"price": "free",
"category": "Tax & GST"
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