How do I calculate GST on an amount?

Enter the amount, choose the GST rate, and select whether the amount is inclusive or exclusive of GST to calculate the tax amount and final total.

Can I calculate inclusive GST using this tool?

Yes. The calculator supports both GST inclusive and GST exclusive calculations.

Calculate GST inclusive and exclusive amounts using common Indian GST slabs such as 5%, 12%, 18%, and 28%.

Amount (₹)

GST Rate (%)

Mode

GST can be calculated on a pre-tax amount or extracted from an all-inclusive amount depending on the billing setup.

GST Amount = Taxable Value × GST Rate ÷ 100

For inclusive bills, the calculator reverse-engineers the taxable value first and then isolates the GST portion.

Exclusive GST adds tax on top of the base value, while inclusive GST means the entered amount already includes the tax portion.

Yes. It works well for quick invoice checks, quote preparation, and basic GST calculations.