Calculator Inputs
Enter typical values for the past 24 hours. Use decimals where needed.
Example Data Table
Use these sample rows to understand typical inputs and outcomes.
| Study Hours | Sleep Hours | Break Minutes | Stress | Focus | Caffeine (mg) | Days | Activity | Hydration | Screen-off | Typical Outcome |
|---|---|---|---|---|---|---|---|---|---|---|
| 5 | 8 | 70 | 3 | 8 | 80 | 2 | 35 | 2.2 | 70 | Low (steady recovery) |
| 7.5 | 7 | 45 | 6 | 6 | 150 | 5 | 20 | 1.8 | 30 | Moderate (tighten sleep and breaks) |
| 11 | 5.5 | 20 | 8 | 4 | 320 | 12 | 10 | 1.1 | 10 | High/Severe (recovery day recommended) |
Formula Used
The calculator produces a 0–100 score by summing weighted components. Each component is clamped to its range.
| Component | Weight | Definition (scaled) |
|---|---|---|
| Workload | 0–25 | 25 × clamp((StudyHours − 4) ÷ 8, 0, 1) |
| Sleep deficit | 0–20 | 20 × clamp((8 − SleepHours) ÷ 4, 0, 1) |
| Break deficit | 0–10 | 10 × clamp((60 − BreakMinutes) ÷ 60, 0, 1) |
| Stress load | 0–20 | 20 × clamp((Stress − 1) ÷ 9, 0, 1) |
| Focus penalty | 0–10 | 10 × clamp((7 − Focus) ÷ 6, 0, 1) |
| Caffeine load | 0–5 | 5 × clamp((CaffeineMg − 100) ÷ 400, 0, 1) |
| Streak load | 0–5 | 5 × clamp((ConsecutiveDays − 3) ÷ 17, 0, 1) |
| Activity deficit | 0–3 | 3 × clamp((30 − ActivityMinutes) ÷ 30, 0, 1) |
| Hydration deficit | 0–1 | 1 × clamp((2 − HydrationLiters) ÷ 2, 0, 1) |
| Screen deficit | 0–1 | 1 × clamp((60 − ScreenOffMinutes) ÷ 60, 0, 1) |
Interpretation bands: 0–24 Low, 25–49 Moderate, 50–74 High, 75–100 Severe.
How to Use This Calculator
- Enter your typical daily values from the last 24 hours.
- Click Calculate Score to see results above the form.
- Review the component breakdown to find the biggest strain driver.
- Apply one or two adjustments today, then re-check tomorrow.
- Use CSV/PDF exports to track trends weekly.
Daily load distribution
Many students cycle between 4 and 12 study hours on busy days. In this calculator, workload points start rising after 4 hours and approach the 25‑point cap near 12 hours. For example, moving from 6 to 10 hours increases workload points from about 6.25 to about 18.75, which often shifts the overall band.
Sleep gap impact
Sleep is scored against an 8‑hour target because recovery scales strongly with time in bed. Dropping from 8 to 6 hours adds about 10 points, while 5 hours pushes near the 20‑point ceiling. If your workload is steady, a one‑hour sleep gain can reduce the total score by roughly 5 points, which is a meaningful weekly trend change.
Breaks and recovery minutes
Break time is compared to a 60‑minute daily recovery target, counting short resets and longer pauses. If breaks fall to 30 minutes, the break deficit is about 5 points. At 0 minutes, the deficit reaches 10 points. A practical benchmark is 5–10 minutes per hour, which typically maintains moderate scores even during long blocks.
Stress and focus signals
Stress is scaled from 1 to 10 and can contribute up to 20 points, reflecting the compounding effect of deadlines and uncertainty. Focus quality below 7 adds up to 10 points, capturing inefficient sessions, repeated rereads, and slower recall. A stress value of 8 with focus 4 can add roughly 20 points combined, equivalent to several hours of extra workload.
Streak, caffeine, and lifestyle
Consecutive study days above 3 add streak load up to 5 points, which becomes visible during exam preparation sprints. Caffeine above 100 mg adds up to 5 points, flagging reliance instead of recovery. Activity below 30 minutes adds up to 3 points, hydration under 2 liters adds 1 point, and low screen‑off time adds 1 point. Small penalties stack, so improving two micro‑habits can lower the score by 3–5 points.
Interpreting the score bands
Scores 0–24 indicate stable pacing with recovery. At 25–49, adjust one lever first, usually sleep or breaks, and recheck the next day. At 50–74, plan a lighter workload block and protect bedtime, because deficits accumulate. At 75–100, schedule recovery blocks, reduce daily hours, and aim for a score under 60 within 48 hours.
FAQs
1) What does the exhaustion score represent?
It’s a 0–100 indicator of short-term study strain based on workload, recovery, and stress signals. Higher scores suggest a stronger need to adjust sleep, breaks, or hours soon.
2) How often should I calculate this score?
Daily during busy weeks is ideal. If your routine is stable, checking two to three times weekly is enough to catch drift before it becomes severe.
3) Why do sleep and stress carry high weights?
Sleep deficit and stress scale fatigue quickly. In the model, each can contribute up to 20 points, which matches how reduced recovery and pressure can degrade focus and endurance.
4) Can I use the score to plan a recovery day?
Yes. If you’re in the 50–74 range, lower intensity and protect bedtime. If you’re 75+, prioritize rest blocks, reduce study hours, and aim to return below 60 within 48 hours.
5) Does caffeine always increase the score?
Only after about 100 mg per day. The model adds a small penalty up to 5 points to reflect reliance. Moderate intake can still fit a low or moderate score if recovery is strong.
6) What should I export with CSV or PDF?
Export after each calculation when tracking change over time. The file captures inputs, score, and category so you can compare patterns across exam weeks and lighter weeks.