Stock Split Calculator
See your new share count and adjusted price after a forward or reverse stock split — your total value stays the same.
How it works
For an a-for-b split: new shares = shares × a ÷ b · new price = price × b ÷ a · total value unchanged
A stock split changes how a company divides its value among shares without changing the value itself. In a forward split like 2-for-1, you end up with twice as many shares each worth half as much; in a reverse split like 1-for-10, you get one share for every ten you held, each worth ten times more. Because shares and price move in exactly opposite proportion, your total holding is worth the same the instant the split takes effect.
Worked example
Owning 100 shares at $50 in a 2-for-1 split gives you 200 shares at $25. Both add up to $5,000 — nothing was gained or lost, the position was just re-sliced into smaller, more affordable pieces.
Frequently asked questions
Do I make or lose money in a split?
Not at the moment of the split — your total value is identical before and after. Any later gain or loss comes from the price moving, not from the split itself.
Why do companies split their stock?
Forward splits lower the share price to make the stock more accessible and liquid. Reverse splits raise the price, often to meet an exchange listing requirement or shed a low-price image.
What happens to fractional shares?
Uneven ratios can leave a fraction — a 3-for-2 split of an odd share count, for example. Brokers usually either credit the fractional share or pay out its cash value; policies vary.
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Educational estimate, not investment or tax advice. Returns are never guaranteed and past performance does not predict the future. Confirm with a licensed advisor.