Second Brain Load Calculator

How much is living in your head costing you?

Productivity

Focus

Calculator

Mental Load Inputs

Open Tasks in Your Head (not written down)

Average Mental Check-ins per Day per Item

Hours of Broken Sleep per Week

About This Tool

Keeping unresolved tasks in your head creates hidden switching overhead. This calculator estimates the weekly cost of mental check-ins and sleep-related attention leakage from unclosed loops.

How calculation works: Weekly mental-loop time = open tasks × check-ins per day × 35 seconds × 7 days, converted to hours. Sleep penalty hours are added from broken sleep input. Mental RAM percentage is a capped weighted score from open tasks, check-in frequency, and sleep disruption. Productivity loss estimate is derived from that RAM score plus sleep impact. Reclaimable hours assumes a recoverable fraction when tasks are externalized.

The core goal is operational: externalize commitments, then protect review and execution windows. Use the Time Card Calculator to reserve those windows and the Meeting Cost Calculator to reduce avoidable interruptions.

If recovery is collapsing attention stability, check the Sleep Debt Calculator and Caffeine Half-Life Calculator.

See more Productivity tools for knowledge-work systems.

All calculations happen locally in your browser.

Frequently Asked Questions (FAQ)

What does mental RAM mean here?

Mental RAM is a practical metaphor for how much working attention is occupied by open loops. As more unfinished items stay in your head, less cognitive capacity remains for high-quality execution.

Is this a clinical assessment?

No. This is a productivity heuristic, not a medical diagnostic tool. It estimates planning overhead and attention friction so you can prioritize externalizing tasks into trusted systems.

How do I reclaim the estimated hours?

Capture open loops into a task system, schedule review blocks, and remove low-value calendar load. Use the Time Card Calculator to reserve weekly review slots.

Can sleep quality change this result?

Yes. Broken sleep amplifies cognitive drag. Track recovery with the Sleep Debt Calculator and stimulant timing with the Caffeine Half-Life Calculator.

Is my information private?

Yes. Calculations run fully in your browser and no personal data is transmitted.

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