How it works
Use this when a price is quoted before tax, or when a bill already includes GST and you need the taxable value. Pick a common rate or type your own. Intra-state supplies are split equally into CGST and SGST. Inter-state supplies are shown as IGST. This does not file a return or look up an HSN code.
GST = base × rate. If the amount already includes GST, base = amount / (1 + rate).