Date & Time

Age Calculator

Calculate exact age from a birth date.

Age in Days

Calculate your exact age in days.

Age in Minutes

Calculate age in minutes.

Century Calculator

Find the century of a year.

Countdown

Calculate time remaining to a target date.

Add to Date

Add days, months or years to a date.

Date Difference

Calculate days between two dates.

Day of Week

Find the weekday of any date.

Day of Year

Find the day number within the year.

Decade Calculator

Find the decade of a year.

Leap Year Check

Check if a year is a leap year.

Milliseconds to Date

Convert epoch milliseconds to a date.

Minutes to Seconds

Convert minutes to seconds.

Time to Seconds

Convert HH:MM:SS to total seconds.

Time Zone Converter

Convert a time between time zones.

Week Number

Get the ISO week number of a date.

World Clock

Show current time in major time zones.

Zodiac Sign

Find the zodiac sign from a birth date.

Age in Hours

Calculate your exact age in hours.

Age in Months

Calculate age in months.

Age in Seconds

Calculate age in seconds.

Age in Weeks

Calculate age in weeks.

Add Business Days

Add business days to a date.

Calendar Generator

Generate a monthly calendar for any year/month.

Chinese Zodiac

Find the Chinese zodiac from a year.

Cron Next Runs

Show the next dates matching a cron expression.

Date Format Converter

Convert a date to multiple common formats.

Week to Date

Get the date of an ISO week.

Date Minus Days

Subtract days from a date.

Date Plus Days

Add days to a date.

Date to Milliseconds

Convert a date to epoch milliseconds.

Ordinal Date

Format a date as "1st January 2024".

Date to Words

Spell a date out in English words.

Day Name from Number

Get the day name from a number (1-7).

Days in Month

Get the number of days in a month.

Days Left in Year

Count days remaining in the year.

Days Since

Count days since a past date.

Days to Hours

Convert days to hours.

Days Until

Count days until a future date.

Decimal to Time

Convert decimal hours to HH:MM.

Pregnancy Due Date

Estimate due date from last period.

Hours Between

Calculate hours between two times.

Hours to Minutes

Convert hours to minutes.

Work Hours Calculator

Calculate worked hours with break time.

ISO Week Date

Convert a date to ISO 8601 week format.

Julian Date

Convert a date to a Julian day number.

Julian Date to Calendar

Convert a Julian day number to a date.

Meeting Time Planner

Find a time across multiple time zones.

Military Time Converter

Convert between 12h and 24h time.

Minutes Between

Calculate minutes between two times.

Month Name

Get the name of a month number.

Month Start & End

Find the first and last day of a month.

Next Birthday Countdown

Count days until your next birthday.

Quarter of Year

Find the quarter of a date.

Season Finder

Find the season of a date.

Seconds to Time

Convert seconds to hours, minutes and seconds.

Semester Finder

Find the semester of a month.

Sleep Calculator

Find ideal wake-up times based on sleep cycles.

Add Time

Add hours and minutes to a time.

Time Between Dates

Calculate the full breakdown between two datetimes.

Time Difference

Calculate the difference between two times.

Time in Words

Convert a time to English words.

Time to Decimal Hours

Convert HH:MM to decimal hours.

Timezone Offset

Get the UTC offset of a timezone.

Week Start Date

Find the Monday of a given week.

Birthday Weekday

Find the weekday you were born on.

Weekdays Between Dates

Count weekdays between two dates, skipping Saturdays and Sundays.

Weekdays in Month

Count weekdays in a month.

Weekends in Month

Count weekend days in a month.