Fatigue and Energy Level Calculator
The Fatigue and Energy Level Calculator estimates your readiness score using sleep hours, stress, and activity levels. This tool helps drivers and shift workers determine if they are safe for duty. Whether you are planning a long drive, starting a night shift, or managing sleep debt, this tool provides a clear risk assessment. Optimize your performance and safety by understanding your body’s current energy capacity.
How Fatigue/Energy Readiness Score Is Calculated
The Fatigue/Energy Readiness Score quantifies your ability to perform tasks safely by analyzing your sleep and physical state. We use a weighted formula that adds points for rest and activity while subtracting for stress and caffeine use.
Energy Score = (Hours of Sleep × 8.3) + (Physical Activity × 5) + (Sleep Quality × 10) - (Stress Level × 0.3) - Caffeine Penalty
Where:
- Hours of Sleep = Total sleep obtained
- Physical Activity = Intensity rating (0-10)
- Sleep Quality = Rated 1 (Poor) to 5 (Excellent)
- Stress Level = Rated 0 (Relaxed) to 100 (Stressed)
- Caffeine Penalty = 15 points if consumed recently
First, we calculate a base score from your sleep duration and quality. Then, we add points for physical activity to account for your current engagement level. Finally, we reduce the score based on stress levels and recent caffeine use to ensure a realistic safety estimate. This method provides a general estimate of your alertness but assumes honest self-reporting.
What Your Fatigue/Energy Readiness Score Means
Your score indicates your current ability to handle demanding tasks safely. Use this number to decide if you should proceed with work, driving, or physical exertion.
Driving Long Distances: Aim for a score of 90 or higher to ensure safety on the road. A score below 60 suggests you are too tired to drive safely, and you should rest for at least an hour before getting behind the wheel.
Shift Work: Scores above 120 mean high readiness for safety-critical duties. If you fall between 60 and 89, take frequent breaks and avoid complex tasks to prevent errors during your shift.
Recovery Planning: Use the "Recommended Sleep" result to plan your recovery for the next day. Prioritize getting at least 7 hours of sleep to improve your future scores and overall health.
Important: High caffeine intake might mask your true fatigue level, so do not rely solely on stimulants to boost your score or stay alert.
This tool is for informational purposes only and is not a substitute for professional medical advice or diagnosis. Always consult a qualified healthcare provider regarding fatigue or sleep disorders.
Recalculate your score daily or after major sleep periods to track trends and adjust your routine.