Free GST tools
Reverse GST Calculator
Find the original price before GST from a total that already includes it. Useful when you only know the final amount on a bill.
Result
- Price before GST
- ₹8,474.58
- GST @ 18%
- ₹1,525.42
- CGST @ 9%
- ₹762.71
- SGST @ 9%
- ₹762.71
- Total (as entered)
- ₹10,000.00
Formula: ₹10,000.00 × 100 ÷ (100 + 18) = ₹8,474.58 before GST, so GST = ₹1,525.42
GST rates in India
| 0.25% | Rough and semi-precious stones |
|---|---|
| 3% | Gold, silver and jewellery |
| 5% | Merit rate: essentials and many daily-use goods and services |
| 18% | Standard rate: most goods and services |
| 40% | Special rate: luxury and sin goods |
Rates as of FY 2026-27. Results are estimates; check the current CBIC notification for your HSN/SAC code before invoicing.
Frequently asked questions
How do I remove GST from a total?
Base price = total × 100 ÷ (100 + GST rate). The GST amount is the total minus the base price.
Why not just subtract the rate from the total?
Because GST is charged on the base price, not on the total. Taking 18% off a GST-inclusive total removes too much.
Raising GST invoices every month? CoTeamSpace Invoicing applies the right rate and CGST/SGST/IGST split on every invoice automatically.
See GST Invoicing