GST Inclusive to Exclusive Calculator (and Back)

Inclusive and exclusive prices

Retail prices and quotes are often given including GST, while invoices show the taxable value and the tax separately. This tool lets you move between the two using the same rate and type of supply for both panels.

Formulas

Inclusive → exclusive: Taxable value = Inclusive price × 100 ÷ (100 + Rate)
Exclusive → inclusive: Inclusive price = Taxable value × (100 + Rate) ÷ 100

Example (illustrative)

A Morbi tile trader quotes ₹5,250 per box including GST at 5%. Taxable value = ₹5,250 × 100 ÷ 105 = ₹5,000, and GST = ₹250 (CGST ₹125 + SGST ₹125 within the state, or IGST ₹250 for an inter-state buyer). Going the other way, ₹5,000 plus 5% GST is ₹5,250.

Common mistake

Taking the rate percentage of the inclusive price (for example, 5% of ₹5,250 = ₹262.50) overstates the tax. Always divide by (100 + rate).

Frequently asked questions

Why is removing 18% from ₹118 not ₹96.76?

Because GST is charged on the taxable value, not on the inclusive price. ₹118 includes 18% of ₹100, so the taxable value is ₹118 × 100 ÷ 118 = ₹100. Subtracting 18% of ₹118 gives the wrong answer.

What does “GST inclusive” mean?

The price already contains the GST. A GST-exclusive price is the taxable value, and GST is added on top when the invoice is raised.

Can rounding make the numbers differ by a paisa?

Yes. When you back out GST from an inclusive price, the taxable value may not be a whole number of paise. This calculator keeps your inclusive amount unchanged and absorbs any one-paisa difference into the taxable value.

Does the calculator know my product’s rate?

No. Select the rate yourself after confirming it for your HSN or SAC code on CBIC.

GST Inclusive / Exclusive Calculator

Remove GST from a price

Add GST to a price