Time & Dates
Free time calculators: exact age, date difference, work hours, time zones, sleep cycles, and countdowns. Precise tools to manage your time.
Age Calculator
Calculate your exact age in years, months, days, hours, and minutes from your birth date.
Date Calculator
Calculate the difference between dates or add/subtract days, weeks, months, or years from a date.
Time Calculator
Add, subtract and convert time units. Perfect for calculations with hours, minutes and seconds.
Work Hours Calculator
Calculate total work hours by adding multiple shifts and subtracting breaks. Get decimal format for payroll and visual breakdown by day of the week.
Duration Calculator
Calculate the exact duration between two dates and times in days, hours, minutes, and seconds.
Day Counter
Count the days remaining or elapsed since a specific date.
Day of the Week Calculator
Discover what day of the week any calendar date was or will be.
Time Zone Calculator
Convert times between different world time zones and compare multiple cities.
Time Card Calculator
Calculate hours worked, overtime, and weekly pay from your clock punches. Ideal for payroll tracking with automatic regular and overtime pay calculation.
Sleep Calculator
Calculate the best times to sleep or wake up based on 90-minute sleep cycles. Wake up refreshed by completing 4-6 cycles with personalized recommendations.