IPO GMP Calculator

Estimate listing price and profit per lot from the grey market premium.

How the IPO GMP Calculator works

The Grey Market Premium (GMP) is the premium at which IPO shares trade unofficially before listing. Add it to the issue price to get an indicative listing price, and multiply by lot size to see the expected gain per lot.

IPO GMP Calculator formula

Expected listing price = Issue price + GMP · Gain per lot = GMP × Lot size × Lots

Results are estimates for illustration only and not financial advice.

How to use the IPO GMP Calculator

Enter the IPO's upper price band and the latest GMP from the IPO GMP page.
Add the lot size and the number of lots you expect to get.
Read the expected listing price, gain per share and estimated profit per lot.

Need live numbers? Check IPO GMP today, current IPOs or the IPO allotment guide.

IPO GMP Calculator: FAQs

Is GMP a guarantee of listing gains?

No. GMP is an unofficial, unregulated indicator that can change quickly. Actual listing prices are decided by demand on listing day.

Why can GMP be negative?

A negative GMP means grey-market participants expect the stock to list below its issue price.

Is the IPO GMP Calculator free to use?

Yes. The IPO GMP Calculator on IPO Darbaar is free, needs no sign-up and works on mobile and desktop.

Is my data saved anywhere?

No. All calculations run in your browser; the numbers you enter are not sent to or stored on our servers.

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