Stock Split Calculator
Calculate stock split from your own entered figures.
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Currency: Amounts are calculated in the currency you select; this site does not convert between currencies and does not use live exchange rates.
What this tool does
Calculate stock split from your own entered figures. A split changes share count and per-share price only; exchanges may round fractional shares to cash in lieu, which this ignores.
How to use the Stock Split Calculator
- Enter or select shares held before the split.
- Enter or select price per share before the split.
- Enter or select split numerator (new shares).
- Enter or select split denominator (old shares).
- Read the calculated result; change any measurement to compare alternatives.
Formula
new shares = shares × numerator/denominator; new price = price × denominator/numerator (a 2-for-1 split is 2/1; a 1-for-5 reverse split is 1/5)
- shares
- Shares held before the split
- price
- Price per share before the split
- num
- Split numerator (new shares)
- den
- Split denominator (old shares)
A split changes share count and per-share price only; exchanges may round fractional shares to cash in lieu, which this ignores.
Worked example
For stock split calculator, the following measurements illustrate the exact method: Shares held before the split: 100; Price per share before the split: 50; Split numerator (new shares): 2; Split denominator (old shares): 1.
Inputs
- Shares held before the split100
- Price per share before the split50
- Split numerator (new shares)2
- Split denominator (old shares)1
Result
- Shares after the split200
- Price per share after the split$25.00
- Total holding value (unchanged by the split)$5,000.00
Results explained
- Shares after the split
- Shares after the split from the formula above. A split changes share count and per-share price only; exchanges may round fractional shares to cash in lieu, which this ignores.
- Price per share after the split
- Price per share after the split from the formula above. A split changes share count and per-share price only; exchanges may round fractional shares to cash in lieu, which this ignores.
- Total holding value (unchanged by the split)
- Total holding value (unchanged by the split) from the formula above. A split changes share count and per-share price only; exchanges may round fractional shares to cash in lieu, which this ignores.
Frequently asked questions
new shares = shares × numerator/denominator; new price = price × denominator/numerator (a 2-for-1 split is 2/1; a 1-for-5 reverse split is 1/5)
A split changes share count and per-share price only; exchanges may round fractional shares to cash in lieu, which this ignores.
No. All numbers are entered by you or come from the dated reference table shown on this page; calculations run locally.
This is an estimate, not financial, tax or legal advice. Verify the inputs and output with official sources and a qualified professional.
Check period consistency, currency, percentage inputs and the assumptions: A split changes share count and per-share price only; exchanges may round fractional shares to cash in lieu, which this ignores.