Time & Date Calculators
Count the days between two dates, find the date a number of days, weeks or months from today, count down to a holiday, or add hours and minutes — with time zones, holidays and daylight saving handled.
19 calculators
- Age CalculatorExact age in years, months and days on any date, with the next birthday and its weekday.
- Date CalculatorAdd or subtract days, weeks, months or business days from a date, with the weekday and steps.
- Days Between Dates CalculatorDays between two dates both ways of counting, with weeks, months and business days.
- Days to Months ConverterConvert days to months with the exact factor and a printable table.
- Days to Seconds ConverterConvert days to seconds with the exact factor and a printable table.
- Hours CalculatorHours between two times minus unpaid breaks, in h:mm and decimal hours, with pay for the shift.
- Hours to Days ConverterConvert hours to days with the exact factor and a printable table.
- Hours to Minutes ConverterConvert hours to minutes with the exact factor and a printable table.
- Hours to Seconds ConverterConvert hours to seconds with the exact factor and a printable table.
- Military Time ConverterMilitary time to regular time and back in one box, how to say it, and the hours between two times.
- Milliseconds to Seconds ConverterConvert milliseconds to seconds with the exact factor and a printable table.
- Minutes to Days ConverterConvert minutes to days with the exact factor and a printable table.
- Minutes to Hours ConverterConvert minutes to hours with the exact factor and a printable table.
- Minutes to Seconds ConverterConvert minutes to seconds with the exact factor and a printable table.
- Months to Years ConverterConvert months to years with the exact factor and a printable table.
- Online TimerA countdown timer with an alarm: presets from 1 to 60 minutes, pause, +1 minute, and the end time shown.
- Time CalculatorAdd and subtract hours, minutes and seconds in any format, or plan a schedule from a start time.
- Time Duration CalculatorHours and minutes between two dates and times, across midnight, daylight saving and time zones.
- Weeks to Years ConverterConvert weeks to years with the exact factor and a printable table.
Quick answers and popular values
Date Calculator
- 6 months ago
- 90 days ago
- 60 days ago
- What Is Today's Date
- 7 days from today
- 10 days from today
- 2 weeks from today
- 14 days from today
- 21 days from today
- 28 days from today
- 30 days from today
- 6 weeks from today
- 45 days from today
- 8 weeks from today
- 60 days from today
- 12 weeks from today
- 90 days from today
- 3 months from today
- 100 days from today
- 120 days from today
- 180 days from today
- 6 months from today
Date arithmetic is easy to get wrong by one day: whether the end date counts, how long a month is, which day a holiday is observed on, and what a leap year does to February. These calculators handle those details and show the steps so you can check them.
Which calculator to use
- A date a number of days, weeks or months away — the date calculator, with business days that skip U.S. federal holidays. The most common periods have their own pages, such as 90 days from today and 6 months from today.
- How many days between two dates — days between dates, with the count both ways and the business days in between. Holiday countdowns, such as when is Thanksgiving, start it on today and the holiday.
- Adding or subtracting hours and minutes — the time calculator, or the time duration calculator for the time between two clock times across midnight and time zones.
- Hours worked — the hours calculator for shifts with breaks.
Today, in your time zone
Every page that starts from “today” reads the date from your own device, so the answer is right in your time zone even late at night. The pages are generated ahead of time and recount in your browser when they open; what is today’s date shows the date in U.S. and ISO formats with the day of the year and the week number.
Units of time
For conversions between units of time — weeks to years, milliseconds to seconds, how many weeks are in a year — the factors come from the mean Gregorian year of 365.2425 days, and each page explains when the exact figure matters.