Time & Date Calculators
9 free time & date calculators — each ready with a live result. Pick one and read your answer straight off the screen.
8 Hour Shift Calculator
Calculate shift start and end times instantly. Perfect for planning your eight hour shift schedule with automatic break time adjustments and flexible duration options.
Age Calculator
Calculate exact age in years, months, and days from a birth date or between two dates, with date-handling tips.
Gestational Age Calculator
Estimate gestational age, pregnancy week, and due date from last menstrual period, conception date, or ultrasound dating.
Julian Date Converter
Convert between Gregorian calendar dates and Julian dates. Essential for astronomy, scientific calculations, and historical date analysis.
Pregnancy Conception Calculator
Calculate your estimated conception date and possible conception range based on due date, last period, or ultrasound information
Reverse Due Date Calculator
Calculate conception date, last menstrual period, and important pregnancy milestones by working backwards from your due date. Get a complete pregnancy timeline with our reverse pregnancy calculator.
Time Card Calculator
Calculate work hours, overtime, and manage lunch breaks with our comprehensive time card calculator. Perfect for tracking employee hours and managing payroll.
Time Duration Calculator
Calculate the duration between times, add or subtract time intervals, and convert between different time formats
Time Zone Calculator
Convert times between different time zones instantly. Easy to use time zone converter with support for daylight saving time and major cities worldwide.