Reverse GST Calculator — Extract GST from Price
Calculate the base price before GST from the final price inclusive of GST. Works for all GST slabs — 5%, 12%, 18%, 28%.
💰 Finance & Money
✅ Free
By SwiftCalcTools Editorial Team · Formula verified
Loading Reverse GST Calculator…
Preparing your calculator
How to Use Reverse GST Calculator
- 1Enter the required values in the input fields above.
- 2Click the Calculate button or results update instantly as you type.
- 3View your results in the output panel below the inputs.
- 4Adjust any values to recalculate instantly.
Formula & Method
Original Price = GST-inclusive Amount ÷ (1 + GST Rate / 100)
GST Amount = GST-inclusive Amount − Original Price
Frequently Asked Questions
Reverse GST calculation extracts the original (pre-GST) price from a GST-inclusive amount. It is the reverse of adding GST to a base price.
The main GST rates are 5%, 12%, 18%, and 28%. Some items (essential goods) are exempt (0%). Special rates of 0.25% and 3% apply to diamonds and gold respectively.
For intra-state (within the same state) transactions, GST is split equally between CGST (Central GST) and SGST (State GST). For inter-state transactions, IGST (Integrated GST) applies at the full rate.
Any business or individual registered under GST whose annual turnover exceeds ₹40 lakh (₹20 lakh for service providers) must file GST returns.
No. Exports are zero-rated under GST, meaning no GST is charged. Exporters can claim a refund of GST paid on inputs.
Yes. Businesses registered under GST can claim Input Tax Credit (ITC) for GST paid on business inputs, reducing their overall tax liability.