Date & Time Tools
Age, date differences, countdowns, workdays and time zones.
Dates, deadlines and time zones trip everyone up. Our date and time tools tell you exactly how old you are down to the day, how many days are left until a milestone, whether a deadline falls on a business day, and what time it really is somewhere else in the world.
Every tool is instant, accurate and free. Because the calculations happen in your browser, your dates and personal details never leave your device.
All date & time tools
Age Calculator
Find your exact age in years, months and days — accurate down to the day.
Date & TimeDate Calculator
Add or subtract years, months, weeks and days to any date in one step.
Date & TimeDays Between Dates
Count the exact number of days between any two dates — instantly.
Date & TimeDate Difference Calculator
Get the full duration between two dates in years, months and days.
Date & TimeBirthday Calculator
Your age, the weekday you were born and exactly how long until your next birthday.
Date & TimeCountdown Timer
A live countdown to any date and time — days, hours, minutes and seconds.
Date & TimeDays Until Calculator
How many days until that big date? Count from today in one click.
Date & TimeWorkdays Calculator
Count the number of working days between two dates, excluding weekends and holidays.
Date & TimeBusiness Days Calculator
Add or subtract business days to find the exact working-day deadline date.
Date & TimeTime Duration Calculator
Work out the hours and minutes between two clock times — including breaks and overnight shifts.
Date & TimeTime Zone Converter
Convert any date and time between 45+ world time zones, DST included.
Date & TimeUnix Timestamp Converter
Convert Unix epoch seconds and milliseconds to readable dates — both ways.
Date & TimeTimestamp Converter
Convert between epoch, ISO 8601, RFC 2822 and human-readable dates — any format in.
Date & TimeWeek Number Calculator
Find the ISO week number of any date — plus which days that week covers.
Date & TimeLeap Year Calculator
Check if any year is a leap year and see the next leap years coming up.
Date & TimePregnancy Due Date Calculator
Estimate your due date from your last period, conception date — or reverse it from a due date.
Date & TimeRetirement Age Calculator
Find the exact date you reach any retirement age — and how long you have to wait.
Date & TimeGrade Calculator
Weighted average of your scores with letter grade — or what you need on the final to hit a target.
Date & TimeWork Hours Calculator
Add up a full week of shifts: daily net hours after breaks, weekly total and pay.
Date & TimeTime Difference Calculator
The exact duration between two dates and times — days, hours, minutes and seconds.
Looking for something else? Browse the other free tool collections: Financial Calculators · Unit Converters · Developer Tools · Text Tools · File & Image Tools · Health & Fitness Calculators · Everyday Tools · Fun & Generators · Math & Statistics.