Stock split calculator: new shares, price & cost basis

Multiply your shares by the split ratio and divide the price by the same ratio. For an A-for-B split, new shares = old shares × A ÷ B and new price = old price × B ÷ A. A 2-for-1 split turns 100 shares at $50 into 200 shares at $25, and the $5,000 position value doesn't change.

Every 2 shares you own become 3, which is a factor of 1.5. 75 shares at $90 become 112.5 shares at $60. Because you can't always hold half a share, your broker may give you 112 shares and pay cash for the remaining 0.5 share.

In the US, a regular stock split generally isn't a taxable event. Your total cost basis stays the same and is spread over the new number of shares, and your holding period carries over. Cash received for a fractional share is usually treated as a sale of that fraction. See IRS Publication 550 or a tax professional for your situation.

The dividend per share is usually divided by the split ratio, so the total dividend you receive stays the same. For example, a $1.00 quarterly dividend becomes $0.50 per share after a 2-for-1 split, paid on twice as many shares.

Multiply the ratios together. NVIDIA split 2-for-1 three times, 3-for-2 once, 4-for-1 and then 10-for-1 between 2000 and 2024, which combines to 480-for-1. One share bought before June 2000 is 480 shares today. Search a ticker above and choose your purchase date to apply every split since then at once.

Shares outstanding are multiplied by the split ratio, and par value per share is divided by it. A company with 150,000 shares outstanding that does a 4-for-2 split ends up with 300,000 shares. Total par value, total equity and market value don't change, so a stock split doesn't need a journal entry that moves money between equity accounts.

Use the same formula with the smaller number first. In a 1-for-10 reverse split, divide your shares by 10 and multiply the price by 10, so 250 shares at $0.80 become 25 shares at $8.00. If your share count doesn't divide evenly, the leftover fraction is usually paid out in cash.

It depends on the company and your broker. Some brokers keep fractional shares in your account. Others sell the fraction and pay you cash in lieu, based on the market price around the split. This calculator shows the whole and fractional shares separately and estimates that payout.

No. A split changes the number of shares and the price per share, not the company's market capitalization or your percentage ownership. Your position is worth the same immediately after the split. The price can still move afterwards like on any other day.

Listed options are adjusted so their total value is preserved. For whole-number splits you typically get more contracts at a proportionally lower strike. For odd ratios, contracts usually change to deliver a non-standard number of shares. Brokers may cancel or adjust open limit and stop orders, so check them after the split.

A share consolidation is another name for a reverse stock split, common in the UK, Canada, Australia and Hong Kong. Several existing shares are combined into one, which reduces the share count and raises the price per share by the same factor.

Forward splits usually make a high share price easier to trade in round lots and can improve liquidity. Reverse splits usually lift a low price, often to stay above an exchange's minimum bid requirement. Neither changes the company's underlying value.