GST Calculator
Add or remove GST at 5%, 12%, 18%, 28% with CGST and SGST split.
Runs on your device · no upload
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About GST Calculator
GST Calculator adds GST to an amount or works backwards from a GST-inclusive price. Choose 0%, 3%, 5%, 12%, 18%, 28% or any custom rate, and see the base amount, CGST, SGST and total. Copy any figure with one tap.
Enter or add your data
All calculations happen right in your browser.
Use the result
Copy it or download it.
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Save the result. No watermark, no sign-up.
Frequently asked questions
How do I remove GST from a total?
Choose Remove GST, enter the amount that already includes GST and pick the rate. The tool shows the price before tax.
What are CGST and SGST?
For sales within one state, GST splits equally into Central GST and State GST. Between states the full amount is IGST.
Which rates are supported?
Common slabs are provided, and you can type any custom rate.
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