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IPO Lot Size Calculator

Companies sell shares in groups called lots. If you want to know how many lots you can buy with your budget, you need IPO lot size calculator.

Enter Details
Total amount you can block for IPO application.
Upper price band of the IPO (cut-off price).
Number of shares per lot as defined in the IPO prospectus.

Your Application Summary

One lot costs ₹15,000. You can apply for lots.
Total Application
₹1,95,000
Minimum (1 lot)
₹15,000
Budget Remaining
₹5,000
Shares at Max
390
Your CategoryRetail (RII)
Max Retail Lots13
You are within the Retail limit of ₹2 lakh. Your application will be considered in the Retail (RII) category.

What is an IPO Lot Size?

When a company comes out with an IPO, it fixes a specific number of shares for one lot. A lot is the minimum number of shares you must buy to apply for that IPO. For example, a company might set its lot size at 15 shares. This means you must buy shares in multiples of 15, such as 15, 30, 45, or 60 shares. You cannot apply for 10 shares or 20 shares. You cannot buy just one share in an IPO (initial public offering). An IPO Lot Size Calculator helps you find how many lots you can buy in seconds.

This IPO Calculator simplifies your bidding process and helps you plan your investment money. The IPO Lot Size Calculator uses this specific lot size to calculate your total application capability.

The IPO Lot Size Calculator

To use the IPO Calculator, you need to provide three simple values. The tool uses these numbers to give you accurate results.

  • Your Budget (₹): This is the total amount of money you want to block for the IPO application.
  • Issue Price per Share (₹): This is the upper price band of the IPO. Investors usually bid at this cut-off price to increase their chances of getting allotment.
  • Lot Size (Shares per Lot): This is the fixed number of shares in one single lot. You can find this information in the IPO prospectus.

Formula for IPO Lot Size Calculations

The IPO Lot Size Calculator uses basic calculation to find your results. You can also calculate these values manually using these copy-paste formulas:

  • Cost of One Lot = Issue Price per Share * Lot Size
  • Maximum Lots You Can Apply = Total Budget / Cost of One Lot
  • Total Allowed Budget for Retail = Maximum Retail Lots * Cost of One Lot

How the Calculator Works with an Example

Let us look at a practical example to understand the calculation clearly. Suppose you want to apply for a new IPO. You have a budget of ₹2,00,000 in your bank account. The company sets the upper price band at ₹500 per share. The lot size for this IPO is 30 shares.

  1. Calculate the Cost of One Lot

First, the IPO Calculator finds the price of a single lot.

Cost of One Lot = ₹500 * 30 = ₹15,000.

  1. Calculate the Maximum Number of Lots

Next, the tool divides your budget by the cost of one lot.

Maximum Lots = ₹2,00,000 / ₹15,000 = 13.33 lots.

Since you can only buy full lots, the tool rounds the number down to 13 lots.

  1. Calculate the Final Summary
  • Total Application Amount: 13 lots * ₹15,000 = ₹1,95,000.
  • Budget Remaining: ₹2,00,000 – ₹1,95,000 = ₹5,000.
  • Total Shares Allotted at Maximum: 13 lots * 30 shares = 390 shares.

Investment Categories in an IPO

The IPO Lot Size Calculator also tells you your investor category based on your application amount. The Indian stock market divides investors into different categories.

Retail Individual Investors (RII) – Retail investors can apply for a maximum of ₹2,00,000 in an IPO. The total cost of your lots must stay below or equal to ₹2,00,000.

Non-Institutional Investors (NII / HNI) – If your application amount is more than ₹2,00,000, you enter the High Networth Individual (HNI) category. This category has two divisions:

  • Small HNI (sNII): Your application amount stays between ₹2,00,000 and ₹10,00,000.
  • Big HNI (bNII): Your application amount is strictly above ₹10,00,000.

Qualified Institutional Buyers (QIB) – This category belongs to large institutions like banks, mutual funds, and foreign investors. They follow a completely different application process.

Benefits of Using an IPO Lot Size Calculator

Using an IPO Lot Size Calculator saves you from complex manual calculations before an IPO closes.

  • Saves Your Time: You do not need to do manual multiplication and division. The IPO Calculator gives instant results.
  • Prevents Rejection: If you apply for a wrong number of shares, the exchange rejects your application. This tool ensures you apply for the exact multiple.
  • Manages Your Funds: The tool tells you exactly how much money will get blocked in your bank account. You can plan your finances for other IPOs accordingly.
  • Identifies Your Category: You get clear clarity on whether you are applying as a Retail investor or an HNI investor.

Frequently Asked Questions

What is an IPO Lot Size Calculator?

An IPO Lot Size Calculator is an online financial tool. It helps you find out how many lots of an IPO you can buy within your specific budget.

Why do companies set a lot size in an IPO?

Companies set a lot size to manage the large number of investors efficiently. It standardizes the application process and makes share allotment easier for the registrar.

What is the maximum limit for a retail investor in an IPO?

A retail investor can apply for shares worth up to ₹2,00,000 in a single IPO. If your application cross this amount, you become an HNI investor.

How does the IPO Calculator find the maximum lots?

The IPO Calculator divides your total budget by the cost of one single lot. It then rounds down the answer to the nearest whole number.

Can I enter any custom budget in the lot size calculator?

Yes, you can enter any budget amount in the tool. The calculator will analyze your budget and tell you the exact number of eligible lots.

What happens to the remaining budget after the calculation?

The remaining budget is the cash that is left over because it was not enough to buy another full lot. This money stays free in your bank account.

What is the cut-off price in an IPO?

The cut-off price is the highest price in the IPO price band. Retail investors use this price to ensure their application gets accepted during high demand.

Can I use this IPO Calculator for SME IPOs?

Yes, you can use this tool for SME IPOs. SME IPOs usually have much larger lot sizes and require higher minimum investments.

What is the difference between sNII and bNII categories?

The sNII category covers applications between ₹2 lakh and ₹10 lakh. The bNII category covers large applications that are worth more than ₹10 lakh.

Does the calculator guarantee IPO allotment?

No, the calculator only helps you plan your application size. Share allotment depends on the total subscription level and a lucky draw process.

Can I apply for fractional lots in an IPO?

No, you cannot apply for fractional lots like 1.5 lots or 2.3 lots. You can only apply for whole numbers like 1, 2, or 3 lots.

Is the IPO Lot Size Calculator free to use?

Yes, this online calculator is completely free for all investors. You can use it multiple times for different IPOs.

What is the minimum lot application size?

The minimum application size for any investor is always 1 lot. You cannot apply for less than one full lot.

Where can I find the official lot size of an IPO?

You can find the official lot size in the Red Herring Prospectus (RHP) of the company. It is also available on stock exchange websites and IPO INDEX.

Why should I use the upper price band in the calculator?

You should use the upper price band because companies generally allot shares at the highest price due to high investor demand.

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