The Sleep Debt Calculator helps you track how much sleep you’re getting versus a chosen nightly target. Enter your desired sleep hours per night, the number of days you want to evaluate, and the actual hours slept each night (comma-separated). The tool sums slept hours, compares them to the target, reports total sleep debt (or surplus), shows per-night differences, and offers a simple recovery suggestion (how many nights it would take to repay the debt by adding 15–30 minutes/night). It’s a practical way to visualize cumulative sleep shortfall and plan gentle recovery — if you have ongoing sleep issues or severe daytime sleepiness, talk with a sleep specialist or healthcare provider.