Date & Time Calculators
Date math, exact age, work hours, and day counter.
Exact Age Calculator (Years, Months, Days & Hours)
Calculate your exact age in years, months, days, hours, and minutes from your birth date and a target date.
Business Working Days & Billable Hours Calculator (Excludes Weekends)
Calculate effective business working days (Monday-Friday/Saturday) and total billable work hours excluding weekends and public holidays.
Chronological & Prematurity Corrected Age Calculator (Pediatric & School)
Calculate chronological age and prematurity corrected age (gestational weeks at birth) in total months and days.
Add or Subtract Days, Weeks, Months or Years From Date Calculator
Add or subtract days, weeks, months, or years to any start date to find exact future or past target date.
Date Calculator (Add, Subtract & Date Difference)
Add or subtract days, weeks, or months to a start date, or compute exact day difference between two calendar dates.
Advanced Date Difference Calculator (Business Days, Weeks & Weekends)
Calculate exact difference in days, weeks, months, business working days, and weekends between any two dates.
Day Counter (Calendar Days & Business Days)
Count total days between two dates, estimating Business / Working Days (excluding weekends).
Day of the Week Calculator for Any Date
Find out what day of the week (Monday, Tuesday, Wednesday, etc.) any past or future date falls on.
Day of the Week, Zodiac Sign & Birthstone Calculator (Zeller's Rule)
Find out which day of the week (Monday, Tuesday, etc.) you were born on, your zodiac sign, and birthstone using Zeller's Congruence.
Exact Age & Personal Chronology Calculator (Years, Months, Days, Seconds)
Calculate your exact age in years, months, days, hours, minutes, and heartbeats on any target comparison date.
Hours Worked Calculator (Clock In, Clock Out & Break)
Compute total net hours worked between clock-in and clock-out time, deducting break or lunch time.
Pregnancy Due Date (EDD), Conception & Gestational Age Calculator
Calculate Estimated Due Date (EDD) from Last Menstrual Period (LMP), Conception Date, or IVF Embryo Transfer Date.
Time Calculator (Add & Subtract Hours & Minutes)
Add or subtract accumulated hours, minutes, and seconds, converting totals to decimal hours and days.
Weekly Time Card & Overtime Pay Calculator
Calculate total weekly hours worked, overtime breakdown (1.5x rate), and total gross pay.
Multi-Segment Time Duration Addition & Subtraction Calculator
Add or subtract up to 3 time durations in sexagesimal hours, minutes, and seconds (HH:MM:SS) computing average lap time.
Time Duration Calculator (Between Dates & Times)
Compute exact elapsed time span in days, hours, and minutes between a start moment and an end moment.
Time Zone Converter & Difference Calculator (All 24 Global UTC / GMT Zones & World Capitals)
Calculate exact hour difference across all 24 global UTC time zones (UTC-12 to UTC+14) and world capital cities (Point A to Point B).
Time Zone Converter & Difference Calculator (All 24 Global UTC / GMT Zones & World Capitals)
Calculate exact hour difference across all 24 global UTC time zones (UTC-12 to UTC+14) and world capital cities (Point A to Point B).
Work Hours, Timesheet & Weekly/Monthly Paycheck Calculator
Calculate total worked hours disaggregated into regular and overtime (>40h), estimating weekly, monthly, and annual gross paycheck.