Psychology

Fitts' Law Movement Time Calculator

Calculate movement time to a target using Fitts' law. Enter distance, target width, and motor constants a and b to find index of difficulty and movement time.

Hick's Law Reaction Time Calculator

Calculate choice reaction time from number of response alternatives using Hick's law. Enter baseline RT, information processing rate, and number of choices to predict response speed.

IQ Score Percentile Calculator

Calculate the percentile for any IQ score using the normal distribution. Enter an IQ score to see what percentage of people score at or below that level.

Signal Detection Theory Calculator

Calculate d-prime (d'), criterion c, and sensitivity from hit rate and false alarm rate. Used in psychophysics, radiology, and machine learning to separate sensitivity from bias.

Weber-Fechner Sensation Calculator

Calculate just-noticeable differences using Weber's law and perceived sensation magnitude using the Fechner and Stevens power laws. Enter stimulus intensity and Weber fraction.

Yerkes-Dodson Arousal Performance Curve

Model the inverted-U relationship between arousal and performance using Yerkes-Dodson theory. Adjust arousal level and task difficulty to visualize the performance curve.

Social Media Time Cost Calculator

Calculate time spent on social media per year and what you could do instead. Converts scrolling hours into books read, workouts, and skills learned.

Emotional Regulation Difficulty Scale

Assess how difficult it is for you to manage and regulate your emotions with a short self-assessment based on emotional regulation research.

Growth Mindset vs Fixed Mindset Calculator

Assess where you fall on the growth vs fixed mindset spectrum with a short questionnaire based on Carol Dweck's research from Stanford University.

Imposter Syndrome Score Calculator

Assess your level of imposter syndrome with a validated-style questionnaire. Understand your results and find evidence-based strategies to overcome it.

Self-Compassion Score Calculator

Assess your level of self-compassion across three dimensions: self-kindness, common humanity, and mindfulness. Based on Dr. Kristin Neff research.

Digital Detox Planner Calculator

Plan a digital detox that fits your lifestyle. Calculate screen-free hours, set goals, and track how much time you reclaim per week.

Pomodoro Session Planner

Plan your workday with the Pomodoro Technique. Calculate focus sessions, total deep work time, and your optimal break schedule.

Cognitive Bias Awareness Score

Assess your awareness of common cognitive biases. Answer scenario-based questions to see which biases may affect your decisions.

Gratitude Practice Score

Score your daily gratitude practice and mindfulness habits. Get personalized recommendations to deepen your gratitude routine and improve wellbeing.

Screen Addiction Risk Score

Calculate your screen addiction risk score from daily usage patterns, compulsive behaviors, and impact on daily life. Understand your relationship with screens.

Sleep Quality Score Calculator

Rate your sleep quality across key factors and get a score with personalized tips for improvement. Based on sleep health research.

Work-Life Balance Score Calculator

Assess your work-life balance with a structured scoring tool. Identify problem areas and get practical improvement strategies.

Memory Retention Calculator

Estimate memory retention using the Ebbinghaus curve R = e^(-t/S). Returns retention at 1 day, 1 week, and 1 month with optimal spaced repetition schedule.

Procrastination Cost Calculator

Calculate financial and time cost of procrastination from hourly rate and hours wasted per day. Returns daily, weekly, monthly, and annual productivity loss.

Attention Span Estimator

Estimate your optimal focus session length from age, task type, and daily habits. Returns work block duration, break intervals, and daily deep work capacity.

Self-Esteem Assessment

Assess self-esteem with the 10-item Rosenberg Scale. Returns a score from 0-30, a low-to-high category, and evidence-based tips for healthier self-regard.

Sleep Debt Calculator

Calculate accumulated sleep debt from your target sleep need (7-9 hours) and actual nightly sleep over the past week. Returns risk level and recovery time.

Sleep Debt Recovery Calculator

Calculate your accumulated sleep debt and how long it takes to recover. Plan a sleep recovery schedule based on your deficit.

Cognitive Load Calculator

Assess mental workload by rating active tasks, decisions, interruptions, and stress. Returns a score with guidance on reducing tasks or taking a break.

Emotional Intelligence Self-Assessment

Assess your emotional intelligence across five key EQ dimensions. Get personalized insights on self-awareness, self-regulation, empathy, and social skills.

Personality Type Quick Assessment

Discover your personality type across four MBTI-style dimensions — I/E, S/N, T/F, J/P. Returns a 4-letter type code with trait description.

Resilience Score Calculator

Assess psychological resilience with a self-report questionnaire across emotional regulation, social support, and coping style. Returns a low-to-high rating.

Social Battery Calculator

Estimate social battery level and recharge time from recent events and intensity. Returns an energy score and introvert vs extrovert recovery guidance.

Anxiety Self-Check (GAD-7) Calculator

Take the GAD-7 anxiety assessment for a 0-21 severity score. Rates anxiety as minimal, mild, moderate, or severe with when-to-seek-help guidance.

Burnout Assessment Calculator

Assess burnout risk with a 10-question survey covering emotional exhaustion, depersonalization, and reduced accomplishment. Returns score 0-100.

Decision Matrix Calculator

Compare up to four options using weighted criteria in a decision matrix. Assign importance weights to each factor and get a ranked total score for every option.

Life Satisfaction Score (SWLS)

Measure your life satisfaction using the Satisfaction With Life Scale (SWLS). This validated 5-question psychological assessment rates your overall wellbeing.

Work-Life Balance Calculator

Evaluate work-life balance from daily hours for work, sleep, exercise, family, and leisure. Returns a balance score and breakdown of your 168-hour week.

Focus / Pomodoro Calculator

Calculate Pomodoro focus sessions needed to complete any task from estimated hours. Shows total work time, short breaks, long breaks, and daily session count.

Gratitude Journal Streak Calculator

Track your gratitude journaling streak. Enter your start date to see how many days you have been journaling and hit motivational milestones.

Habit Streak Calculator

Enter the start date of your habit and see your current streak in days, weeks, and months, plus motivational milestones you've reached.

Meditation Timer Calculator

Track daily meditation and calculate weekly, monthly, and yearly totals. Set a daily minute goal and see milestones at 10, 100, and 1,000 hours of practice.

Mental Health Self-Check (PHQ-9 Style)

Answer 9 questions about your mood, sleep, and energy over the past two weeks. Get a score with general guidance. This is not a diagnostic tool.

Reaction Time Test

Test your reaction time by clicking when the screen changes color. Measures response time in milliseconds and compares to the average human reaction of 250ms.

Sleep Quality Score Calculator

Rate your sleep quality based on bedtime, wake time, interruptions, and time to fall asleep. Get a score and improvement suggestions.

Stress Level Assessment

Answer 10 lifestyle questions to get a personalized stress score. See which habits contribute most and get targeted advice for reducing your stress level.