Time and Date

  • Time Until Calculator
    Calculate the time remaining until a target clock time, including wraps past midnight. Get the countdown in HH:MM:SS, total minutes and total hours.
  • Hours to Seconds Calculator
    Convert hours to seconds instantly. Enter any number of hours and get the exact equivalent in seconds using seconds = hours × 3600.
  • Minutes From Now Calculator
    Add any number of minutes to a starting time and get the result on a 24-hour clock, with automatic day carry past midnight. Fast and free.
  • Hours From Now Calculator
    Find out what time it will be a set number of hours from now. Enter a start time and hours to add — see the clock time and day carry instantly.
  • Days Until School's Out Calculator
    Count down the days until summer break! Enter your last day of school and today's date to see exactly how many days and weeks until school's out.
  • Business Days Until Date Calculator
    Count business days (Mon–Fri) until a target date, excluding weekends. See working days, calendar days, and weekend days between two dates.
  • Days Until Tax Day Calculator
    Count the days until US Tax Day (April 15) from today or any date. See weeks and months remaining until the next IRS filing deadline.
  • Weeks Until Due Date Calculator
    Find how many weeks are left until your due date. Enter your due date and today's date to see weeks and days remaining and your approximate gestational age.
  • Days Until End of Month Calculator
    Find out how many days are left until the end of the month. Enter any date to see days remaining, the last day, and total days in that month.
  • Days Until Black Friday Calculator
    Count the days until the next Black Friday (the Friday after the 4th Thursday of November, US). Leave year blank for the next upcoming date.
  • Days Until Friday Calculator
    Count how many days until Friday. Select today's day of the week and instantly see the countdown to the upcoming Friday.
  • Days Until Mother's Day Calculator
    Count the days until Mother's Day, the 2nd Sunday in May. Pick any year and start date to find the exact date and countdown in days.
  • Days Until Due Date Calculator
    Count the days, weeks, and weeks-and-days remaining until any target date. Free countdown calculator for deadlines, vacations, and events.
  • Days Until Father's Day Calculator
    Count the days until Father's Day, observed on the third Sunday in June (US/UK). Enter a year for an instant countdown to the date.
  • Passport Six-Month Validity Checker
    Check if your passport meets the 6-month validity rule for your trip. Enter travel and expiry dates to see if you can travel and your buffer in days.
  • Schengen 90/180 Day Stay Calculator
    Check your Schengen Area 90/180 rule compliance. Enter trips and a reference date to see days used in the trailing 180-day window and days remaining.
  • Date Difference Calculator
    Find the number of days, weeks, months and years between two dates. Free date difference calculator showing the exact gap between any start and end date.
  • Intermittent Fasting Time Calculator
    Calculate when your fast ends and your eating window opens and closes based on your last meal and chosen fasting schedule like 16:8 or 18:6.
  • Half-Life Time Calculator
    Calculate the time required for a substance to decay from an initial quantity to a remaining amount using its half-life and the decay formula.
  • Time and a Half Calculator
    Calculate time and a half overtime pay. Enter your hourly rate, regular hours, and overtime hours to see your 1.5× overtime rate and total pay.
  • Hours Between Two Times (Overnight) Calculator
    Calculate hours worked between a clock-in and clock-out time, even when the shift crosses midnight. Subtracts unpaid breaks to give paid hours.
  • Jet Lag Recovery Calculator
    Estimate how many days you need to recover from jet lag based on time zones crossed and travel direction (eastward vs westward).
  • Weekly Overtime Calculator
    Calculate regular pay, overtime pay and total weekly earnings using the 40-hour threshold (US FLSA standard). Enter hours, rate and OT multiplier.
  • Local Time to UTC Converter
    Convert a local time to UTC using any timezone offset. Enter the hour, minute, and UTC offset (e.g. -5 or +5.5) to get the equivalent Coordinated Universal Time.

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