Energy Peak Finder Calculator

Formula used

This calculator converts your 1–10 log into a 0–100 score and adjusts it using recovery and habit multipliers.

Peak window is the longest contiguous set of entries where SmoothedScore ≥ PeakThreshold. Trough window uses SmoothedScore ≤ 1.10 × MinSmoothed.

How to use this calculator

1. Pick your chronotype and set your workday start and end.
2. Enter sleep, stress, exercise, caffeine, hydration, and meals.
3. Log energy ratings at several times across the day.
4. Click Find my peaks to generate peak and trough windows.
5. Schedule deep work in the peak window and lighter tasks in the trough.
6. Download CSV or PDF to track trends across days.

Energy logging cadence and coverage

Reliable peak finding needs consistent sampling. Capture 6–12 energy ratings across your workday, spaced 60–120 minutes apart. Add extra points before and after demanding events, such as presentations or long meetings. If your day runs 06:00–22:00, eight entries usually covers wake-up, mid‑morning, post‑lunch, late afternoon, and evening decline. Notes help explain outliers, like travel, illness, or deadline pressure. Aim for at least three points inside your expected peak to reduce false positives and improve window stability.

Signal weighting and normalization

Each rating is normalized into a 0–100 scale using a simple multiplier, then adjusted by factors that represent recovery and load. Sleep hours and sleep quality nudge the baseline upward or downward, while stress reduces the adjusted score as it rises above a neutral midpoint. Exercise, hydration, meal regularity, and caffeine apply smaller bounded changes. A chronotype factor shifts strength toward the hours you report as easiest.

Peak detection and smoothing

Energy ratings are noisy, so the calculator smooths adjusted scores with a moving average window you choose (1–7). Peak detection uses the highest smoothed value as a reference, then marks the longest contiguous window above a percentage threshold (70–99%). This approach favors stable high‑energy blocks over short spikes. Trough detection highlights the lowest sustained region, helping you protect recovery time and avoid scheduling high‑stakes work.

Interpreting variability for workload design

Average energy describes your typical capacity, but variability matters for planning. A high standard deviation indicates sharp swings, where strict time‑boxing and breaks prevent burnout. The calculator proposes a focus block length between 25 and 90 minutes by combining average level and variability. When the suggested block increases, pair it with structured pauses, such as 40/8 or 55/10 cycles, to maintain cognitive quality.

Operationalizing results across weeks

Use the peak window to schedule deep work, learning, and complex decisions. Keep steady windows for meetings and collaboration, and reserve trough windows for admin tasks, routine replies, or recovery. Export CSV daily to build a simple history. After 10–14 days, compare peak timing shifts against sleep changes, travel, or stress. If peaks drift later, adjust morning commitments and move creative tasks into the new high‑energy band.

FAQs

1) How many energy entries should I record?

Record 6–12 entries across your workday. A minimum of 3 works, but more points improve smoothing, reduce noise, and produce a clearer peak window.

2) What if my day shows two strong peaks?

The calculator highlights the longest sustained window above your threshold. If you want shorter peaks to appear, lower the threshold or reduce the smoothing window.

3) Should I change the peak threshold percentage?

Use 90% for strict peak identification. Drop to 80–85% if your energy is flatter, or raise to 95% when you only want the most elite focus minutes.

4) How do I use the trough window effectively?

Treat trough time as a protective buffer. Schedule admin, routine messages, simple reviews, and breaks. Avoid complex decisions, heavy writing, or negotiations when the trough repeats.

5) Can this work for shift schedules or late nights?

Yes. Set your workday start and end to match your shift, then log entries inside that window. The chronotype setting still helps, but your actual logs drive the results.

6) What happens to my data after I calculate?

The most recent calculation is kept in your session so downloads work. Closing the session or resetting clears it. Use CSV exports if you want a longer history.