⏰ Time & Date
Calculate ages in years and months, add or subtract dates, measure time durations, find week numbers, and convert Roman numerals. Privacy-focused, all calculations happen locally without storing personal data.
Timezone Converter
Convert time between 594+ IANA time zones. Compare multiple cities and handle daylight saving time automatically.
Date Calculator
Add or subtract days, weeks, months, and years from any date. Calculate business days and date differences.
Days from Today Calculator
Add or subtract days, weeks, or months from today. Calculate target dates and distance metrics instantly.
Time Duration Calculator
Calculate time spans between two times. Add, subtract, multiply, and divide hours, minutes, and seconds.
Work Hours Calculator
Calculate work hours, breaks, overtime, and total time for payroll and time tracking.
Military Time Converter
Convert between 12-hour (AM/PM) and 24-hour military time formats instantly.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds format.
Decimal Time Converter
Convert time to decimal hours for payroll. Convert decimal hours back to hours:minutes format.
World Clock
Display current time in multiple cities worldwide. Compare local times, daylight saving offsets, and time differences across time zones.
Weekday Calculator
Find day of week for any date in history or future. Discover what day you were born or any historical event occurred.
Week Number Calculator
Find ISO week numbers and convert between dates and week numbers for any date.
Age Calculator
Calculate exact age in years, months, days, hours, minutes, and seconds. Track birthdays and anniversaries.
Roman Numeral Converter
Convert between Arabic numbers and Roman numerals. Perfect for years, dates, and historical references.