Stock Split Calculator
Calculate how a stock split affects your shares and price per share. Supports forward and reverse splits with common ratio presets.
For informational purposes only. Not financial advice. Calculations are estimates and may not reflect your exact situation. Consult a qualified financial adviser for personalised guidance.
About Stock Split Calculator
A stock split changes how many shares you own and the price per share, but your total investment value stays the same. This calculator shows you exactly what happens to your position after any forward or reverse split.
Forward Splits
In a forward split, you get more shares at a lower price. A 4-for-1 split turns 100 shares at $400 into 400 shares at $100. Quick-select presets make it easy to calculate common ratios like 2:1, 3:1, 4:1, 5:1, 10:1, or 20:1. You can also type any custom ratio.
Reverse Splits
A reverse split reduces your share count and raises the price. Toggle to reverse mode and the calculator flips the math. This is useful when companies consolidate shares to boost their stock price. For tracking your profit or loss after a split, the Stock Profit Calculator handles the math using your new share count and price.
Key Takeaway
The side-by-side comparison makes it clear that total value does not change. The split only adjusts the number of shares and price per share in proportion. If you hold dividend-paying stocks and want to see how a split affects your per-share dividends, the Dividend Yield Calculator can help you recalculate. All calculations run entirely in your browser.
Frequently Asked Questions
What is a stock split?
A stock split increases the number of shares you own while proportionally decreasing the price per share. In a 2-for-1 split, 100 shares at $200 become 200 shares at $100. Your total position value stays the same. Companies split stocks to make shares more accessible to smaller investors.
What is a reverse stock split?
A reverse stock split reduces the number of shares while increasing the price per share proportionally. In a 1-for-10 reverse split, 1000 shares at $5 become 100 shares at $50. Companies do this to raise their share price, often to meet exchange listing requirements.
Does a stock split change the value of my investment?
No. A stock split does not change the total value of your position. It simply divides (or consolidates) your shares at a different price. However, splits can affect trading dynamics, as lower-priced shares sometimes attract more retail investors.
What are the most common split ratios?
The most common forward splits are 2-for-1, 3-for-1, and 4-for-1. Large tech companies have sometimes done 20-for-1 splits. Common reverse splits are 1-for-5, 1-for-10, and 1-for-20.
Can I end up with fractional shares after a reverse split?
Yes. If you hold an odd number of shares during a reverse split, you may receive fractional shares or cash in lieu of fractions depending on your broker's policy. The calculator shows the exact fractional result.