Sleep Debt Calculator

Calculate your cumulative physiological deficit over a 14-day rolling period.

JavaScript is required to run the interactive calculator. Below is the manual formula:

Debt = (Target Nightly Hours × Days) - (Actual Total Hours Slept). If Debt > 0, you are operating in a deficit.

Target Nightly Sleep (Hours)

Actual Average Sleep (Hours)

Timeframe (Days)

Accumulated Deficit:

You cannot repay this in one weekend. Extend your nightly sleep by 30-60 minutes consistently until the debt clears.

Baseline maintained. You are fully recovered.

Methodology & Assumptions

The Mathematics of Debt

Sleep debt is cumulative. The brain tracks this deficit (likely via adenosine accumulation in the basal forebrain) for up to 14 days. A deficit of 8 hours spread over a week impairs reaction time and executive function as severely as a blood alcohol concentration of 0.10%.