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Productivity Calculators

Habits, decision quality, cognitive load and timing tools.

Best Day to Move Calculator

Drop your city tier, current lease-end month, flexibility window, unit size, and negotiation propensity. Calculator surfaces the optimal mid-month move date in your city — rents drop 6-12% in winter for tier-1 metros (NYC, SF, LA, Boston, DC, Chicago) — and computes annual savings vs the worst-month alternative within your flex window.

Cognitive Load Calculator

Drop your active projects, daily decisions, open todos, weekly meetings, daily notifications, and 7-day average sleep. Calculator computes a 0-100 cognitive-load score against published thresholds (Miller 7-item working memory, Bargh & Vohs 60-decision ceiling, Atlassian 23-min interruption-recovery, Walker sleep literature), identifies your top drag, and recommends the single highest-leverage reclaim.

Compound Habit Calculator

Drop a habit, the daily improvement rate (% compounded), the time horizon, and your current baseline. Calculator computes the compounding multiplier (the famous Atomic Habits 37.8× framing for 1%/day over 1 yr), surfaces 1-yr / 5-yr / 10-yr trajectories, and frames the result in habit-specific cumulative units (reading hours → books, writing words → novels, language minutes → CEFR fluency).

Decision Fatigue Calculator

Drop your daily conscious-decision count, trivial/meaningful split, scheduled-routine %, mental-rest blocks, alcohol/wk, and average sleep. Calculator surfaces effective decisions after routine, rest recovery, alcohol + sleep penalties, and the specific hour of the day your decision quality crashes — calibrated against Bargh & Vohs / Vohs & Heatherton glucose-willpower research and Walker sleep literature.

Probability of Success Calculator

Drop your project type, prior experience, team size, runway, and timeline realism. Calculator anchors against published base rates (cold-start SaaS 4%, restaurants 30%, books 8%, agencies 22%, etc.) and adjusts for your specific personal advantages — surfacing your honest adjusted probability and the single biggest risk in the math.
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