SplitDilutionDesk

1-for-20 Reverse Split Calculator

Worked example: how a 1-for-20 reverse stock split changes share count and price, with a prefilled link to the calculator.

Editorial review required before launchBuild edition: September 2026Sources and limits below

A 1-for-20 reverse split turns 10,000,000 shares at $50 into 500,000 shares at $1,000, an illustrative baseline used across this site, not a specific company's real share count. A 10,000-share position becomes 500 shares, with position value and ownership percentage unchanged by the split alone.

1-for-20 split worked example
MetricBeforeAfter
Shares outstanding10,000,000500,000
Your position (illustrative)10,000500
Price per share (illustrative)$50$1,000

Open a 1-for-20 split in the workspace

How the ratio works

1-for-20 means 1 new share for every 20 old shares. Because the numerator is smaller than the denominator, the share count falls and the mechanical price rises by the same factor. The invariant to check: shares times price should be the same before and after, aside from rounding.

A split changes units, not value. Ownership dilution comes from new share issuance (an offering, warrant exercise, or ATM program), which this calculator models separately.

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