Gap Up / Gap Down Calculator
Size of an opening price gap versus the prior close.
Your numbers
Gap
7.50%
Dollar gap
$6.00
The link and the printed sheet both save your numbers, so anyone who opens them sees the same estimate.
Compare scenarios
Save your current numbers, change them, save again, and see each estimate side by side. Saved in this browser only.
How it works
Gap % = open ÷ prior close − 1.
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Results are estimates for education only and are not investment advice.