# Stock Split Calculator

Calculate the effect of a stock split on your shares and price. Find your new share count and adjusted price for any split ratio. Free online calculator.

## What this calculates

See exactly how a stock split affects your position with our free calculator. Enter your shares owned, current price, and the split ratio to find your new share count, adjusted price per share, and verify your total position value remains unchanged.

## Inputs

- **Shares Owned** — min 0 — The number of shares you currently own.
- **Current Price per Share** ($) — min 0.01 — The current market price per share before the split.
- **Split Ratio (New Shares)** — min 1, max 100 — The number of new shares for each old share (e.g., 3 in a 3-for-1 split).
- **Split Ratio (Old Shares)** — min 1, max 100 — The number of old shares (e.g., 1 in a 3-for-1 split).

## Outputs

- **New Share Count** — Your total number of shares after the split.
- **New Price per Share** — formatted as currency — The adjusted price per share after the split.
- **Total Position Value** — formatted as currency — Your total position value (unchanged by the split).
- **Additional Shares** — The number of additional shares you received from the split.

## Details

A stock split increases the number of shares outstanding while proportionally reducing the price per share. In a 3-for-1 split, each shareholder receives 3 shares for every 1 share held, and the price per share becomes one-third of the pre-split price. The total value of your position does not change. If you owned 100 shares at $300 ($30,000 total), after a 3-for-1 split you own 300 shares at $100 ($30,000 total).

Companies split their stock to make shares more affordable and accessible to retail investors. High per-share prices can be a psychological barrier, and some brokerages historically did not support fractional shares. Major companies like Apple, Tesla, Amazon, and Google have all executed stock splits when their prices climbed to high levels.

A reverse stock split works in the opposite direction: in a 1-for-10 reverse split, every 10 shares become 1 share at 10 times the price. Reverse splits are often done by companies with very low share prices to avoid being delisted from stock exchanges, which typically require minimum price thresholds. Unlike forward splits, reverse splits are generally viewed negatively by the market.

## Frequently Asked Questions

**Q: Does a stock split change the value of my investment?**

A: No. A stock split does not change the total value of your investment. It increases the number of shares you own while proportionally decreasing the price per share. If you had $30,000 worth of stock before the split, you still have $30,000 after the split. Your ownership percentage of the company also remains the same.

**Q: Why do companies split their stock?**

A: Companies split stock primarily to make shares more affordable and accessible to a wider range of investors. Lower per-share prices can increase trading volume and liquidity. Some companies also split to meet index inclusion requirements. Psychologically, investors may perceive lower-priced shares as having more growth potential, though this is not fundamentally true.

**Q: What is a reverse stock split?**

A: A reverse stock split reduces the number of outstanding shares while increasing the price per share. For example, in a 1-for-5 reverse split, every 5 shares become 1 share at 5 times the price. Companies do this to boost their share price above exchange minimum listing requirements or to improve the stock's perception among institutional investors.

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Source: https://vastcalc.com/calculators/finance/stock-split
Category: Finance
Last updated: 2026-04-21