GST Calculator

Start with the amount on your bill and choose whether it already includes GST. A tax-inclusive amount needs division by one plus the rate, rather than simply subtracting the rate.

Extract inclusive tax
Split intra-state GST
Keep paise totals consistent

How it works

Start with the amount on your bill and choose whether it already includes GST. A tax-inclusive amount needs division by one plus the rate, rather than simply subtracting the rate.

Choose the right inputs

For an intra-state supply, the calculated tax is divided into central and state components. An odd paise goes to the second component so both components still add to the total.

Understand the output

Select inter-state supply to show the same calculated tax as IGST. The place-of-supply classification is an operator input, not a decision made from a postal address.

Use the result carefully

A rate of zero produces no tax. Keep the taxable value, tax and gross amount alongside your bill when checking arithmetic; applicable rates depend on the actual supply.

GST Calculator FAQs

What are the limits of GST Calculator?

Enter the applicable rate yourself. This calculates tax; it does not identify HSN codes or file a GST return.

What does the GST Calculator example show?

At 18% exclusive GST, INR 1,000 becomes INR 1,180 with INR 90 CGST and INR 90 SGST.

How do I use GST Calculator for a real task?

For an intra-state supply, the calculated tax is divided into central and state components. An odd paise goes to the second component so both components still add to the total. At 18% exclusive GST, INR 1,000 becomes INR 1,180 with INR 90 CGST and INR 90 SGST.