Time and Date

  • EST to GMT Converter
    Convert Eastern Standard Time (EST, UTC-5) to Greenwich Mean Time (GMT, UTC+0). Enter an EST time and get the exact GMT clock time by adding 5 hours.
  • Social Security Full Retirement Age Calculator
    US Social Security tool: enter your birth year to find your full retirement age (FRA) when you qualify for 100% unreduced retirement benefits.
  • Weeks Pregnant Calculator
    Find out how many weeks pregnant you are today. Calculate gestational age in weeks and days from your last menstrual period (LMP) date.
  • Time Card Calculator with Lunch Break
    Free time card calculator with lunch break. Enter clock-in, clock-out and break minutes to get net worked hours instantly. Handles overnight shifts.
  • How Many Hours Until a Time
    Find out how many hours and minutes are left until a target time of day. Wraps to the next day automatically if the time has already passed.
  • Hours and Minutes to Decimal Calculator
    Convert hours and minutes into decimal hours instantly. Enter time like 8h 30m to get 8.5 decimal hours for payroll, timesheets, and billing.
  • Days Ago Calculator
    Find out what date it was N days ago. Enter the number of days and get the exact past date, weekday, and ISO format instantly.
  • Weeks Between Dates Calculator
    Calculate the exact number of weeks and days between two dates. Enter a start and end date to get total weeks, remainder days, and decimal weeks.
  • Days Until My Exam Calculator
    Count the days until your exam with this free study countdown. Enter your exam date to see days, weeks left, and total planned study hours.
  • Sleep Cycle Calculator
    Free sleep cycle calculator. Find the best bedtime or wake-up time based on 90-minute sleep cycles plus the time it takes you to fall asleep.
  • Rule of 72 Doubling Time Calculator
    Use the Rule of 72 to estimate how many years it takes an investment to double at a given annual rate. Fast, free doubling time calculator.
  • Video Playback Speed Time Calculator
    Find out how long a video takes to watch at 1.25x, 1.5x, 2x or any speed. Enter the length and speed to see your watch time and time saved.
  • Years to Days Calculator
    Convert years to days instantly. Enter any number of years and get the equivalent days using the 365.25-day average year (accounts for leap years).
  • Epoch Milliseconds to Date Converter
    Convert a Unix epoch timestamp in milliseconds to a human-readable UTC date and time (ISO 8601), with year, month, day, hour, minute and second breakdown.
  • 24-Hour to 12-Hour Time Converter
    Convert military 24-hour time to standard 12-hour AM/PM format instantly. Enter the hour and minute to see the equivalent clock time.
  • What Time Will It Be in X Hours?
    Find out what time it will be in X hours from any start time. Enter a start time and number of hours to get the result in 24-hour HH:MM format.
  • EDT to PDT Converter
    Convert Eastern Daylight Time (EDT) to Pacific Daylight Time (PDT) instantly. PDT = EDT − 3 hours. Enter any hour and minute to get the exact PDT time.
  • EST to UTC Converter
    Convert Eastern Standard Time (EST) to Coordinated Universal Time (UTC) instantly. EST is UTC−5, so UTC = EST + 5 hours (mod 24).
  • IST to UTC Converter
    Convert Indian Standard Time (IST) to Coordinated Universal Time (UTC). IST is UTC+5:30, so subtract 5 hours 30 minutes to get the UTC time instantly.
  • PST to UTC Converter
    Convert Pacific Standard Time (PST) to Coordinated Universal Time (UTC). Enter an hour and minute to instantly add the +8 hour offset.
  • Age Difference Between Two People Calculator
    Find the exact age gap between two people in years, months and days. Enter both birthdays to get the precise difference and total days apart.
  • Dog Pregnancy Due Date Calculator
    Estimate your dog's whelping (due) date from the breeding date. Canine gestation averages 63 days, with a normal range of 58–68 days.
  • Gestational Age from Ultrasound Calculator
    Calculate estimated due date (EDD) and current gestational age from an ultrasound scan date and the gestational age measured at that scan.
  • What Time Was It X Hours Ago?
    Find out what time it was a given number of hours ago. Enter the current time and hours to subtract — get the past clock time and how many days back it rolls.

Categories