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Free productivity tools & calculators

Essential calculators and tools to optimize your habits, productivity and performance. Use them instantly, no account needed.

Pomodoro Timer

Online Pomodoro timer with customizable sessions, automatic breaks and sound notifications.

  • Customizable work/break sessions
  • Completed session counter
  • Sound notification at end of session
  • Works in the background
Start timer

Habit Streak Calculator

Calculate your habit streak, visualize progress and discover key milestones in habit formation.

  • Streak calculation with start date
  • Preset goals (21, 30, 66, 100 days)
  • Science-based milestones
  • Visual progress bar
Calculate my streak

Productivity Score

Rate your daily habits and get a personalized productivity score with actionable recommendations.

  • 8 science-based criteria
  • Score out of 100 with color coding
  • Radar chart of your strengths
  • Personalized recommendations
Calculate my score

TDEE Calculator

Calculate your Total Daily Energy Expenditure and calorie needs based on your goals.

  • Mifflin-St Jeor equation (most accurate)
  • 5 physical activity levels
  • Goals: cut, maintain, bulk
  • Macronutrient breakdown
Calculate my TDEE

1RM Calculator

Estimate your one-rep max for any exercise from your working sets.

  • Epley, Brzycki and Lander formulas
  • Percentage table (1-12 reps)
  • Strength standards by level
  • kg/lbs conversion
Calculate my 1RM

Weekly Planner

Plan your week with time blocks, priorities and habit slots. Printable.

  • 7-day grid with time blocks
  • Color-coded categories (work, sport, personal)
  • Preset habit slots
  • Printable export
Plan my week

Water Intake Calculator

Calculate your daily water needs based on weight, physical activity and climate.

  • Formula based on body weight
  • 5 physical activity levels
  • 4 climate types
  • Daily schedule breakdown
Calculate my needs

Body Fat Estimator

Estimate your body fat percentage using the US Navy method from simple body measurements.

  • US Navy method (high accuracy)
  • Measurements: height, neck, waist, hips
  • Body fat categories
  • kg/lbs conversion
Estimate my body fat

Sleep Cycle Calculator

Calculate the ideal bedtime or wake-up time based on 90-minute sleep cycles.

  • 90-minute sleep cycles
  • Wake-up or bedtime mode
  • Includes fall-asleep time
  • Sleep quality by cycle count
Calculate my cycles

BMI Calculator

Calculate your Body Mass Index from your height and weight. Instant result with category.

  • Standard BMI formula (WHO)
  • Metric and imperial support
  • Color-coded categories
  • Ideal weight range
Calculate my BMI

Macro Calculator

Calculate your protein, carbs and fat needs based on your goals. Per-meal breakdown included.

  • Protein based on body weight
  • Optimal fat/carb split
  • Adapted to your goal (cut/maintain/bulk)
  • Per-meal breakdown (3, 4 or 5 meals)
Calculate my macros

Fitness Unit Converter

Easily convert between kg/lbs, cm/inches, km/miles and kcal/kJ. Quick references included.

  • Weight: kg ↔ lbs
  • Length: cm ↔ inches, feet
  • Distance: km ↔ miles
  • Energy: kcal ↔ kJ
Convert

Screen Time Score

Evaluate your screen time by category and get a score with recommendations to reduce it.

  • 6 screen time categories
  • Score out of 100
  • Visual breakdown
  • Personalized recommendations
Evaluate my screen time

Frequently asked questions

Yes, 100% free with no sign-up required. All calculations happen directly in your browser.

No, no registration is needed. You can use all tools immediately.

The tools run entirely in your browser. No data is sent to our servers. To save and track your data over time, you can create a free Productivity Hub account.

Yes, all tools are optimized for mobile, tablet and desktop.

These are one-time calculators. The Productivity Hub app lets you track your habits, tasks and performance over time with a full dashboard, AI coach and detailed analytics.

Free tools

Boost your productivity with free tools

Essential calculators and tools for your habits, nutrition and performance. No sign-up required.

Pomodoro Timer

Online Pomodoro timer with customizable sessions, automatic breaks and sound notifications.

  • Customizable work/break sessions
  • Completed session counter
Start timer

Habit Streak Calculator

Calculate your habit streak, visualize progress and discover key milestones in habit formation.

  • Streak calculation with start date
  • Preset goals (21, 30, 66, 100 days)
Calculate my streak

Productivity Score

Rate your daily habits and get a personalized productivity score with actionable recommendations.

  • 8 science-based criteria
  • Score out of 100 with color coding
Calculate my score

TDEE Calculator

Calculate your Total Daily Energy Expenditure and calorie needs based on your goals.

  • Mifflin-St Jeor equation (most accurate)
  • 5 physical activity levels
Calculate my TDEE
View all tools