Stock Split Value Calculator
New share count and price after stock split.
Calculate new share count and price after stock split (forward or reverse). Enter shares and new shares in ratio for an instant result.
What this tool does
Enter current shares, price, and split ratio. The tool shows new share count and new price.
Enter Values
Formula Used
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Calculations, display, or translation — let us know.
Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
100 shares at 120 in a 4-for-1 split: 400 shares at 30 each. Value unchanged at 12,000. Stock splits adjust float without changing fundamental value. Common to keep share price accessible to retail investors.
Quick example
With current shares of 100 and current price of 120 (plus new shares of 4 and old shares of 1), the result is 400 shares. Change any figure and watch the output shift — it's often more useful to see the pattern than to memorise the formula.
Which inputs matter most
You enter Current Shares, Current Price, New Shares (in ratio), and Old Shares (in ratio). Not every input has equal weight. Flip one at a time toward extreme values to feel which ones move the needle most for your situation.
What's happening under the hood
Standard stock split mechanics. The formula is listed in full below. If the number looks off, you can retrace the calculation by hand — that's the point of showing the working.
Using this well
Treat the output as one point on a wider map. Run it three times — a pessimistic case, a central case, and a stretch case — and plan against the pessimistic one. That habit alone separates people who stick with an investment plan from those who bail at the first wobble.
What this doesn't capture
Steady-rate math ignores real-world volatility. Actual returns are lumpy; sequence-of-returns risk matters most in drawdown; fees and taxes drag on compound growth; and behaviour changes in drawdowns can reduce outcomes below the projection. Treat the number as one scenario, not a forecast.
Where to go next
This calculation rarely sits alone in a planning exercise. If you're running these numbers, you'll probably also want the stock profit and loss calculator, the equity return calculator, and the stock split calculator — each one answers a different question in the same territory. Treating them as a set rather than in isolation usually produces a more honest picture.
Stock split produces new share counts based on the inputs provided.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
Standard stock split mechanics.
References
Frequently Asked Questions
Split changes value?
Reverse splits?
Tax impact?
Fractional shares?
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