Tools & Calculators
Simple, science-backed tools to improve your productivity, health, and wellness. No signup required.
Productivity Tools
Work Time Calculator
Track your productivity hours and optimize your work schedule
FreeDate & Time Calculator
Calculate date differences, add/subtract time, and plan events
FreeAge Calculator
Calculate your exact age in years, months, days, and hours
FreeTime Zone Converter
Convert times between global time zones instantly for remote work and scheduling
FreeHealth & Wellness Tools
Sleep Debt Calculator
Calculate your sleep debt and get personalized recommendations for better rest
FreeSleep Cycle Calculator
Find the best time to wake up or go to sleep based on 90-minute cycles
FreeEye Strain Test
Quick assessment to check if you're experiencing digital eye strain
FreeStress Score Calculator
Evaluate your stress levels and get actionable wellness tips
FreeGratitude Journal Generator
Create personalized gratitude prompts to boost your mood
FreeBreathing Exercise Timer
Guided breathing exercises for stress relief and relaxation
FreeNap Duration Calculator
Calculate optimal nap times based on sleep science for maximum energy
FreeWater Intake Calculator
Calculate personalized daily hydration needs based on weight and activity
FreeCaffeine Cut-off Calculator
Find the perfect time to stop caffeine for better sleep quality
FreeFitness Tools
Finance Tools
Expense Split Calculator
Split bills and expenses fairly between friends or groups
FreeTip Calculator
Calculate tips and split restaurant bills easily
FreeBudget Calculator
Plan your monthly budget with the 50/30/20 rule
FreeMortgage Calculator
Calculate monthly mortgage payments with taxes and insurance
FreeSavings Goal Calculator
Calculate time to reach savings goals with compound interest
FreeDebt Payoff Calculator
Plan your journey to debt freedom and compare payoff strategies
FreeWant More? Try Our Apps
Get advanced features, offline access, and seamless tracking with our iOS and Mac apps.