Stock Split Calculator
Calculate new share count, adjusted price, and cost basis after a stock split or reverse split.
Calculation Inputs
Calculation Results
📊
Enter inputs on the left and click Calculate to view results.
Formula & Methodology
New Shares = Old Shares × (For/Of); New Price = Old Price × (Of/For)
Stock splits don't change portfolio value — they divide existing shares into more pieces at proportionally lower prices.
Frequently Asked Questions
Do stock splits affect my taxes?
No. A stock split is not a taxable event. Your original cost basis is adjusted proportionally among the new shares.