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MyFocusClock

100% Client-Side Utility

ADHD Time-Blindness, Reverse Deadline & 90-Min Sleep Calculator

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ADHD Task Duration & "Time Tax" Calculator

Enter how long your brain thinks each task takes—we calculate the real clock finish time.

8m
Accounts for notifications & side-quests
Realistic Completion Readout 3 Active Tasks
Your Brain's Guess
1h 05m
Est. finish: 10:35 AM
Realistic ADHD Time
2h 13m
+68m hidden "Time Tax"
True Clock Finish Time
Includes transition & distraction buffers
11:43 AM
Time Breakdown 49% Base • 39% ADHD Tax • 12% Switches
Base Work ADHD Tax + Distraction Task Switching
Recommended Companion System

Stop Losing Hours to Time Blindness: ADHD Brain Dump to Action Digital Planner (v2)

Includes 106 hyperlinked pages across 3 formats designed specifically for neurodivergent minds—turn overwhelming brain dumps into prioritized daily blocks on iPad, tablet, or desktop.

Get ADHD Planner v2 → 2027 Hyperlinked Planner →
✨ Official Crafty Pixel Studio Digital Planners

Ready to Turn Daily Calculations into an Effortless Routine?

Pair this free calculator with our instant-download GoodNotes, Notability, and tablet planners. Choose the 106-page ADHD Brain Dump to Action Digital Planner (v2) or the complete 143-page 2027 Hyperlinked Digital Planner (6,619 links).

ADHD Digital Planner v2 2027 Digital Planner
Transparent Formulas & SEO Reference

How the ADHD Time-Blindness & Sleep Cycle Formulas Work

Updated for 2026–2027
1. The ADHD Time-Tax Formula

Planning fallacy causes people with time blindness to estimate only the "core execution" of a task while ignoring setup, context switching, and dopamine resistance.

Real Time = Σ(Est × Friction × 1.15) + (Tasks − 1) × SwitchBuffer
2. Reverse Deadline Calculation

Instead of asking "How much time do I have left?", reverse planning subtracts every physical transition step from your arrival timestamp to prevent "Waiting Mode."

Hard Stop = Arrival − (Commute + Hyperfocus Buffer + Prep Steps)
3. 90-Minute Sleep Cycle Math

Human sleep cycles average 90 minutes across light, deep, and REM stages. Adding a customizable 22-minute sleep-onset latency prevents mid-cycle alarm grogginess.

Bedtime = WakeTime − (90m × Cycles) − LatencyMins
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Frequently Asked Questions

What is ADHD time blindness?

Time blindness is underestimating how long tasks take. Planning fallacy makes people estimate only the “core execution” of a task while ignoring setup, context switching, and dopamine resistance.

How does the Time Tax calculator work?

Real Time = (Estimate × Friction × 1.15) + (Tasks − 1) × Switch Buffer. Each estimate is multiplied by a friction level (Low 1.25×, Standard 1.50×, High 1.85×, Heavy 2.20×), plus 15% for distraction, plus a switching buffer between tasks.

How long is a sleep cycle?

Human sleep cycles average 90 minutes across light, deep, and REM stages. Waking at the end of a cycle, rather than mid-cycle, prevents alarm grogginess. The calculator adds a customizable fall-asleep latency (default 22 minutes for ADHD) to the 90-minute cycles.

What is a reverse deadline?

Instead of asking how much time is left, reverse planning starts from your arrival time and subtracts every physical transition step — commute, parking, getting dressed, shower, meals, and a hyperfocus buffer — to give you the exact time you must start, so you never sit in waiting mode.

How do the focus sprints work?

Dump every task, then sort them into sprints: 15-minute micro-sprints with 3-minute breaks, classic 25-minute Pomodoro with 5-minute breaks, or 50-minute hyperfocus blocks with 10-minute breaks. A built-in timer runs each sprint.

Last updated: 15 November 2026. This tool is a planning aid, not medical advice — talk to a clinician about ongoing sleep problems.