Free tool
GST calculator
Add GST on top of an amount, or remove it from a GST-inclusive price — with the CGST/SGST or IGST split for any rate.
The amount is the value before tax; GST is added on top.
Indicative. In Finocket, this split is applied to every invoice line automatically from the place of supply.
GST calculator — FAQ
How do I add GST to an amount?
Enter the pre-tax amount, pick the GST rate (e.g. 18%) and keep 'Add GST'. The calculator shows the GST and the total. For an intra-state supply the GST splits equally into CGST and SGST; for inter-state it's a single IGST.
How do I remove GST from a GST-inclusive price?
Switch to 'Remove GST' and enter the GST-inclusive amount. The calculator backs out the taxable base and the GST portion at the chosen rate.
What's the difference between CGST/SGST and IGST?
Intra-state supplies (buyer and seller in the same state) are taxed as CGST + SGST, each half the total GST. Inter-state supplies are taxed as a single IGST equal to the full rate.