1. What is Sleep Efficiency?

Sleep Efficiency (SE) is a measure of sleep quality that represents the percentage of time spent asleep while in bed. It's calculated as the ratio of total sleep time to time spent in bed, multiplied by 100%.

2. How Does the Calculator Work?

The calculator uses the Sleep Efficiency formula:

Where:

• \( SE \) — Sleep Efficiency (%)
• \( TST \) — Total Sleep Time (minutes)
• \( TIB \) — Time In Bed (minutes)

Explanation: This formula calculates the percentage of time you actually slept compared to the total time you spent in bed attempting to sleep.

3. Importance of Sleep Efficiency

Details: Sleep efficiency is a key indicator of sleep quality. Higher efficiency (85% or above) indicates good sleep quality, while lower efficiency may suggest sleep disorders or poor sleep habits.

4. Using the Calculator

Tips: Enter total sleep time and time in bed in minutes. Both values must be positive numbers, and sleep time cannot exceed time in bed.

5. Frequently Asked Questions (FAQ)

Q1: What is considered good sleep efficiency?
A: Sleep efficiency of 85% or higher is generally considered good. Efficiency below 85% may indicate sleep problems.

Q2: How can I improve my sleep efficiency?
A: Maintain consistent sleep schedule, create comfortable sleep environment, avoid caffeine before bed, and limit screen time before sleeping.

Q3: What's the difference between sleep efficiency and sleep quality?
A: Sleep efficiency is a quantitative measure, while sleep quality is more subjective and includes how rested you feel upon waking.

Q4: Can sleep efficiency be too high?
A: While rare, efficiency approaching 100% might indicate insufficient time in bed or potential measurement errors.

Q5: How is this different from sleep latency?
A: Sleep latency measures how long it takes to fall asleep, while sleep efficiency measures the proportion of time asleep while in bed.