GST Calculator

What this tool does

This GST calculator estimates GST and the final amount from a taxable value and selected rate. It is useful for basic price checks, quotations, and invoice preparation in India. It does not determine your legal tax liability or replace accounting advice.

How to use it

1. 1. Enter the original amount and choose the applicable GST rate.
2. 2. Select whether the entered amount is before GST or already includes GST.
3. 3. Review the GST component and total payable amount.
4. 4. Use the result as a check, then verify invoice details, place of supply, and tax treatment before issuing a tax document.

Practical example

For a taxable value of ₹10,000 at 18% GST, the GST is ₹1,800 and the total is ₹11,800. If ₹11,800 is GST-inclusive, the taxable value is ₹10,000 and GST is ₹1,800.

Who it is for

Use this tool when you need a quick, understandable result or document draft. Review the final output carefully before submitting, sharing, or relying on it.