LongevityMate Tools

Free health calculators that explain the answer

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2 reviewed tools in Sleep and recovery

Add the caffeine stated on up to six product labels. Exact local arithmetic in milligrams, with no safe-limit, dose or timing advice.

Calculate time in bed from bedtime and wake time. Optionally subtract awake minutes for a clearly labelled sleep estimate, with no cycle claims.

Each calculator must publish its formula, assumptions, eligible population, exclusions, sources, version and review date.

Calculator inputs and results are not placed in URLs or analytics. A tool can be disabled or rolled back without replacing its stable URL.