Tools & Calculators
Simple, science-backed tools to improve your productivity, health, and wellness. No signup required.
Productivity Tools
Boost your efficiency with time trackers, date calculators, and productivity timers. Perfect for remote workers, students, and professionals.
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
FreePomodoro Timer
Stay focused with the proven 25-minute Pomodoro Technique for maximum productivity
FreeUnit Converter
Convert between length, weight, temperature, volume, and more units instantly
FreeGPA Calculator
Calculate semester or cumulative GPA with support for multiple grading scales
FreeReading Time Estimator
Calculate how long it will take to read your text, article, or book based on word count
FreeEvent Countdown Timer
Count down to weddings, birthdays, vacations, and special occasions with beautiful timers
FreeMeeting Cost Calculator
Calculate the true cost of meetings based on attendees' time and compensation
FreePassword Strength Checker
Test password strength and get security tips - all processing done locally in your browser
FreeHealth & Wellness Tools
Monitor and improve your well-being with sleep calculators, stress assessments, and hydration trackers. Science-backed tools for a healthier lifestyle.
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
FreeIntermittent Fasting Timer
Track your fasting windows with 16:8, 18:6, OMAD and see metabolic stages
FreeDue Date Calculator
Calculate pregnancy due date and track week-by-week milestones
FreeHeart Rate Zone Calculator
Calculate personalized heart rate training zones for optimal cardio and fat burning
FreeFitness Tools
Reach your fitness goals with calorie calculators, macro trackers, and workout planners. From BMI to TDEE, get the data you need.
TDEE Calculator
Calculate your Total Daily Energy Expenditure for fitness goals
FreeBMI Calculator
Calculate your Body Mass Index and check if you're at a healthy weight
FreeMacro Calculator
Calculate optimal daily macros (protein, carbs, fats) for your fitness goals
FreeOne Rep Max Calculator
Estimate your 1RM and get training percentages for strength programs
FreeRunning Pace Calculator
Calculate running pace, predict race times for 5K, 10K, marathon and more
FreeCalories Burned Calculator
Calculate calories burned during exercise using MET values for 100+ activities
FreeFinance Tools
Take control of your money with budget planners, bill splitters, and savings calculators. Smart tools for smarter financial decisions.
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
FreeHourly to Salary Converter
Convert between hourly wage and annual salary with tax estimates
FreeRetirement Calculator
Calculate when you can retire with FIRE projections and savings scenarios
FreeRent vs Buy Calculator
Compare the true costs of renting versus buying a home with detailed financial analysis
FreeLifestyle & Personal Tools
Fun and useful tools for everyday life, from pet age calculators to carbon footprint trackers.
Pet Age Calculator
Calculate your pet's age in human years using scientifically accurate formulas for dogs and cats
FreeCarbon Footprint Calculator
Calculate your environmental impact and get personalized tips to reduce your carbon footprint
FreeLove Language Quiz
Discover your primary love language based on Gary Chapman's 5 Love Languages framework
FreeFrequently Asked Questions
Are these tools really free?
Yes, all tools are 100% free with no hidden fees, subscriptions, or premium tiers. We believe everyone should have access to useful productivity and wellness tools.
Do I need to create an account?
No signup required. All tools work instantly in your browser without any registration or login.
Is my data saved or shared?
No. All calculations happen locally in your browser. We don't store, transmit, or share any of your data with third parties.
Do these tools work on mobile devices?
Yes, all tools are fully responsive and work seamlessly on phones, tablets, and desktop computers.
How accurate are these calculators?
Our calculators use industry-standard formulas and are regularly tested for accuracy. However, they provide estimates and should not replace professional advice.
Can I use these tools offline?
The tools require an internet connection to load initially, but calculations happen in your browser without needing continuous connectivity.
Want More? Try Our Apps
Get advanced features, offline access, and seamless tracking with our iOS and Mac apps.