Goods and services tax GST calculator

India’s Goods and Services Tax (GST) is added to most goods and services, and you often need to work it either way: add GST to a net price, or extract the GST already inside a tax-inclusive price. This calculator does both, and breaks the tax into its CGST, SGST and IGST components with the standard slab tables.

The reverse (extracting GST from an inclusive price) is where hand calculations go wrong — you cannot simply subtract the rate, because it was applied to the smaller net figure, so the amount must be divided out correctly. The CGST/SGST/IGST split matters for invoicing: intra-state sales split the tax into CGST and SGST, while inter-state sales use IGST.

It runs in your browser, so your figures stay private. Use it to price goods with GST, prepare or check an invoice, or recover the net amount from a tax-inclusive total.