Free Stock Split Adjuster & Share Multiplier Online
Calculate your new share count, adjusted cost basis, and historical price equivalent after a forward or reverse stock split. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Select Split Ratio
Choose forward split (e.g., 2:1, 4:1, 10:1) or reverse split (e.g., 1:5, 1:10).
Input Pre-Split Shares
Enter total number of shares held prior to the corporate action.
Input Original Purchase Price
Enter original cost paid per share.
Inspect Adjusted Position
View new total share count and adjusted cost basis per share (total position value remains unchanged).
Frequently Asked Questions
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