Sleep Debt Calculator

This tool helps you track your sleep over a week to see if you're getting enough rest. By comparing your actual sleep hours to your nightly goal, you can visualize your sleep debt (the hours you've missed) or surplus.

Monthly Sleep Log

Nightly Sleep Goal (hours)

Sat, Nov 1

Sun, Nov 2

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Sun, Nov 30

November 2025

You have a total sleep debt of 240.0 hours this month.

Visual Sleep Analysis

A clear bar chart shows your sleep hours versus your goal for each day of the week.

Instant Calculations

Your weekly sleep debt or surplus is calculated in real-time as you log your hours.

Easy To Use

Simply set your nightly sleep goal and enter the hours you slept each day.

Works Anywhere

This is a browser-based tool that works on any device, with no installation needed.

Privacy Guaranteed

All your sleep data is processed on your device and is never stored or sent to a server.

Completely Free

A powerful health and wellness tool available for free, without any registrations or hidden fees.

Understanding Sleep Debt

Sleep debt is the cumulative effect of not getting enough sleep. A large sleep debt can lead to mental and physical fatigue. This calculator is a simple way to become more aware of your sleep patterns and make adjustments for a healthier lifestyle.

How It Works

Set Your Goal: Start by entering your ideal number of sleep hours per night.
Log Your Sleep: For each day of the week, input the actual number of hours you slept.
Analyze the Chart: The bar chart will update to show your sleep for each day compared to your goal, highlighting any sleep debt.
See Your Weekly Total: The summary at the bottom tells you your total sleep debt or surplus for the week.

For a more complete wellness picture, use this tool with our Focus & Wellness suite, which includes tools for productivity and relaxation.