Split a brick invoice into taxable value and tax, or work backwards from an all-inclusive price, and net off the credit you hold on inputs. You enter the rate that applies to your invoice — the tool does not carry rate tables.
How this calculator works
The GST rate is an input. Statutory rates change and are not hardcoded here — take the rate from your invoice or your accountant.
Intra-state supply splits the tax into equal CGST and SGST halves; inter-state supply is a single IGST line. That is invoice mechanics, not a rate.
Reverse mode takes an inclusive amount and separates the tax already inside it.
Runs entirely in your browser. Nothing you type is sent anywhere or saved. This is arithmetic, not tax advice.