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Stock Split and Reverse-Split Scenario — result sheet
Calculate post-split shares, price, dividend per share, and position value for a forward or reverse stock split ratio.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Split factor = new shares in ratio/old shares in ratio; post-split shares = pre-split shares × factor; post-split price and dividend per share = pre-split values/factor.
A forward split increases the number of shares and reduces the per-share price by the same ratio in this mechanical scenario. A reverse split uses a factor below one and does the opposite. The position value is unchanged by the arithmetic when the price is adjusted exactly, although real market prices, rounding, fractional-share treatment, dividends, taxes, and corporate actions can change the outcome around an actual event.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Shares before split — shares; minimum 1.0E-6; maximum 1000000000000
- Price before split — currency units/share; minimum 1.0E-6; maximum 1000000000
- New shares per old share — shares; minimum 1; maximum 1000000
- Old shares in ratio — shares; minimum 1; maximum 1000000
- Dividend per share before split — currency units/share; minimum 0; maximum 1000000
Worked example
| Input | Value |
|---|---|
| Shares before split | 100 |
| Price before split | 100 |
| New shares per old share | 2 |
| Old shares in ratio | 1 |
| Dividend per share before split | 2 |
A 2-for-1 split changes 100 shares at 100 into 200 shares at 50; the illustrative dividend changes from 2 to 1 per share and the position value remains 10,000.
Assumptions and limits
- The ratio is expressed as new shares per the stated number of old shares and both ratio values are positive whole numbers.
- Price and dividend per share are adjusted inversely to the split factor.
- The shareholder keeps the same economic position and no cash-in-lieu or fractional-share rule is applied.
- The calculation describes the mechanical adjustment and does not predict the post-event market price.
- Dividends are adjusted only as a per-share arithmetic illustration; a company’s declaration and eligibility rules are not modeled.
- Broker, exchange, tax, accounting, and corporate-law treatment must be checked for a real transaction.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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