Stock Split Calculator
What a split does to your share count and price. Your position value does not change.
Method
How it works
Enter the shares owned, pre-split price and the new-to-old split ratio. The split factor is new shares divided by old shares, which multiplies the share count and divides the price.
Because those two changes offset one another, the calculated position value stays unchanged. This describes the mechanical effect of a split and does not predict the market price after trading resumes.
Common questions
Frequently asked questions
Does a stock split increase the value of my position?
No. Under this calculation, more shares are offset by a proportionally lower price, leaving position value unchanged.
How do I enter a 3-for-2 stock split?
Enter 3 as the new-shares value and 2 as the old-shares value.
Can this calculate a reverse stock split?
Yes. A ratio with fewer new shares than old shares, such as 1 for 10, produces fewer shares at a proportionally higher price.
Not financial advice. This calculator is for general informational purposes only. Check figures independently before making financial decisions.