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GST Calculator India
Calculate inclusive or exclusive GST instantly, with CGST and SGST split. Your numbers stay in your browser.
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For planning and estimation only.How this calculator works
Enter a price before tax and the applicable GST rate. The calculator adds GST and shows an equal CGST and SGST split for a typical intra-state supply.
FormulaGST amount = taxable value × GST rate ÷ 100
Worked example
For a taxable value of ₹10,000 at 18%, GST is ₹1,800 and the total is ₹11,800. For an intra-state supply, that is ₹900 CGST plus ₹900 SGST.
Things to know
- For inter-state supplies, IGST generally applies instead of a CGST/SGST split.
- Confirm the correct rate and tax treatment for your product or service before invoicing.
Why use this tool?
- Instant result with Indian number formatting
- No account, upload or personal data required
- Works on phone and desktop
Tax, investment and loan results are estimates—not professional financial or tax advice. Verify important decisions with a qualified adviser or provider.
Content reviewed 21 August 2026