Free online calculator
GST Invoice Calculator
Prepare an indicative GST invoice calculation for one line item.
Free calculator
GST Invoice Calculator
Enter your values to see the result.
Formula explained
Taxable value = quantity × unit price − discount. Intra-state GST splits equally into CGST and SGST; inter-state supply uses IGST.
Worked example
Two units at ₹500 less ₹100 discount create ₹900 taxable value; at 18%, GST is ₹162.
Limitations and assumptions
This is not an invoice generator or tax filing tool.