Free Sleep Calculators

Every tool uses peer-reviewed sleep science. Every calculation stays in your browser. Pick one and start sleeping better tonight.

Why These Tools Work

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Peer-Reviewed Science

Every formula is based on published research from sleep medicine journals.

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100% Private

No accounts. No servers. No data collection. Everything runs in your browser.

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Real Charts

Every tool generates live Canvas/SVG charts. Save, export, or screenshot them.

Latest From the Sleep Lab

Real experiments, real data, no BS.

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