GST calculator
Add GST to a price, or work out the GST included in a total — with the CGST and SGST split.
Free No sign-up Runs in your browser
How it works
How to use the GST Calculator tool
- 1
Choose add or remove
Add GST to a net price, or remove it from a GST-inclusive total.
- 2
Enter amount and rate
Pick a standard slab or type any rate.
- 3
Read the breakdown
Net, CGST, SGST, total GST and gross.
The formulas
Adding GST: GST = amount × rate ÷ 100; total = amount + GST. Removing GST: net = total ÷ (1 + rate ÷ 100); GST = total − net. For intra-state supplies, GST is split equally into CGST and SGST/UTGST; inter-state supplies are charged IGST at the full rate.
Example
₹10,000 + 18% GST = ₹11,800 (CGST ₹900 + SGST ₹900). Removing 18% from ₹11,800 gives a net of ₹10,000.
Limitations
We’d rather be upfront about what this tool can’t do yet:
- Rates change by government notification — confirm the applicable slab for your goods or services.
- Cess and reverse-charge cases aren’t included.
FAQ
Frequently asked questions
Is my data sent anywhere?
No. All processing happens locally in your browser. Nothing you enter is uploaded, stored or logged.
Works for VAT too?
Yes — the maths is identical for VAT and sales tax at any rate.
What is the difference between CGST, SGST and IGST?
CGST and SGST are levied by the central and state governments on sales within a state; IGST applies to sales between states.
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