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Reverse GST Calculator
Remove GST from a tax-inclusive amount and see the original price. Your numbers stay in your browser.
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For planning and estimation only.How this calculator works
Use this when a bill already includes GST. The calculator works backwards from the final amount to recover the taxable value and included tax.
FormulaTaxable value = GST-inclusive amount ÷ (1 + GST rate ÷ 100)
Worked example
If the final price is ₹11,800 including 18% GST, the taxable value is ₹10,000 and the included GST is ₹1,800.
Things to know
- This is different from simply subtracting 18% from the inclusive price.
- The CGST/SGST display assumes an intra-state supply.
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