Stock Split Calculator

How it's calculated

Split ratio = old face value ÷ new face value. New shares = shares held × ratio, and new average = old average ÷ ratio. Your total investment stays the same.

What happens to your shares in a stock split

In a stock split, a company divides each share into several shares of a lower face value. The number of shares you hold goes up and the price per share goes down by the same factor, so the total value of your holding does not change at the moment of the split.

For example, if you hold 40 shares with an average buy price of ₹2,400 and the face value goes from ₹10 to ₹2, the split ratio is 1 : 5. You then hold 200 shares at an adjusted average of ₹480. Your total investment is still ₹96,000.

Frequently asked questions

Does a stock split change the value of my investment?

No. You get more shares at a proportionally lower price, so the total value is the same. Any later change in value comes from the market, not from the split.

How is the split ratio worked out?

Divide the old face value by the new face value. A move from ₹10 to ₹2 gives a ratio of 5, meaning each share becomes five.

Why does my average buy price change?

Your total cost stays the same but is now spread over more shares, so the average price per share falls by the split ratio.

How to use the Stock Split Calculator

Enter shares held, average buy price, old face value, new face value. The calculator updates as you type and shows New share count, along with the figures behind it. It runs in your browser, so nothing you enter is sent anywhere. Use the Reset button to go back to the example values.