Date & Time Calculators

Age calculators, date duration, business days, and time zone conversion tools

Age & Birthday (1)
Duration (1)
Business (2)
Time Zones (1)
Calendar (2)
Time Math (2)

Most Popular Date & Time Tools

Age Calculator
Age & Birthday
Popular
Calculate your exact age in years, months, days, hours, and even seconds with zodiac signs.
Exact age calculation
Zodiac signs
Birthday countdown
Date Duration Calculator
Duration
Popular
Calculate the exact time difference between two dates including days, months, and years.
Date difference
Working days
Excluding weekends
Business Days Calculator
Business
Popular
Calculate working days between dates, excluding weekends and holidays.
Working days
Holiday exclusion
Custom weekends

All Date & Time Calculators

Time Zone Converter
Time Zones
Convert time between different time zones around the world.
World time zones
Meeting planner
Countdown Timer
Timers
Create countdown timers for events, deadlines, and special occasions.
Event countdown
Multiple formats
Time Calculator
Time Math
Add, subtract, and calculate time durations in hours, minutes, and seconds.
Time addition
Time subtraction
Hours Calculator
Time Math
Calculate total hours between times, including overnight periods and breaks.
Total hours
Overnight shifts
Date Calculator
Date Math
Add or subtract days, weeks, months, or years from any date.
Date arithmetic
Future dates
Week Number Calculator
Calendar
Find the week number for any date or find dates for specific week numbers.
ISO week numbers
Week to date
Day of Week Calculator
Calendar
Find what day of the week any date falls on, past or future.
Historical dates
Future planning
Sunrise Sunset Calculator
Astronomy
Calculate sunrise and sunset times for any location and date.
Solar times
Location-based
Time Card Calculator
Payroll
Calculate total work hours and overtime from time card entries.
Punch in/out
Overtime calculation
Unix Timestamp Converter
Programming
Convert between Unix timestamps and human-readable dates.
Unix time
Timestamp conversion
Meeting Time Finder
Business
Find the best meeting time across multiple time zones.
Multi-timezone
Best time slots
Retirement Date Calculator
Planning
Calculate your retirement date based on age, service years, or target date.
Retirement planning
Service calculation

Date & Time Topics

Age & Life Events

Calculate ages, birthdays, anniversaries, and important life milestones

Business & Work

Working days, payroll hours, project timelines, and business scheduling

International Coordination

Time zones, global meetings, travel planning, and worldwide scheduling

Programming & Technical

Unix timestamps, API dates, and developer time tools

Calculator Categories

Age & Birthday
1 tools

Age calculations and birthday-related tools

Duration
1 tools

Time periods and date differences

Business
2 tools

Work-related time and scheduling tools

Time Zones
1 tools

World time and timezone conversions

Calendar
2 tools

Calendar calculations and date lookups

Time Math
2 tools

Time arithmetic and duration calculations

Master Time with Precision

Whether you're planning projects, calculating ages, scheduling international meetings, or managing payroll, our comprehensive date and time tools provide accurate calculations for all your temporal needs.