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Time & Date Calculators

87 calculators and 1 tool.

1 Age CalculatorWork out a person's exact age in years, months, and days from a date of birth.2 Age Next Year CalculatorFind age next year from current age.3 Time Age Calculator 2Find time age from birth year and current year.4 Date Difference CalculatorFind how many days lie between two dates, using real calendar dates.5 Birthday Countdown CalculatorCount the days until the next birthday from a birth month and day.6 Countdown Days CalculatorFind days left from total days and days passed.7 Time Countdown Calculator 2Find time countdown from event day and today.8 Countdown CalculatorFind countdown days from target and current day.9 Add Days to Date CalculatorAdd a number of days to a date and get the resulting calendar date.10 Days Since Date CalculatorFind how many days have passed since a past date.11 Days Until Date CalculatorCount how many days remain until a future date, including a countdown in days.12 Hours Between Times CalculatorGet the elapsed time between two clock times as a decimal number of hours.13 Meeting Time Across Time Zones CalculatorConvert a meeting time from one UTC offset to another, for scheduling across zones.14 Minutes to Hours CalculatorConvert a number of minutes into hours and minutes.15 Months to Weeks CalculatorConvert months to weeks approximately, since months vary in length.16 Overtime Hours CalculatorSplit total hours worked into regular hours and overtime hours.17 Project Days Remaining CalculatorCount working-day style calendar days left until a project deadline.18 Seconds to Minutes CalculatorConvert a number of seconds into minutes and seconds.19 Shift Length CalculatorFind the length of a work shift, including an unpaid break, with overnight shifts handled.

Frequently asked questions

What are Time & Date calculators?

Time & Date calculators on BuildCalc are free tools that give instant results from the numbers you enter.

Are Time & Date calculators free?

Yes, all Time & Date calculators are free, with no sign-up and no download.

How do I use a Time & Date calculator?

Open a calculator from the list, enter your numbers, and read the instant result.

20 Sleep Time CalculatorFind what time to go to bed, given a wake-up time and desired hours of sleep.21 Subtract Days from Date CalculatorSubtract a number of days from a date and get the resulting calendar date.22 Time Difference CalculatorFind the difference between two times in hours and minutes.23 Time Zone Offset CalculatorConvert a time between two time zones using offsets you enter — no live lookup.24 Weeks to Days CalculatorConvert a number of weeks into days, and see the equivalent in hours too.25 Working Days Between Dates CalculatorCount Monday-to-Friday working days between two dates, excluding weekends.26 Days Between Dates Calculator 2Find days in a number of weeks.27 Movie Watch Time Calculator 2Find total watch time from movies and length.28 Overtime Hours CalculatorFind overtime hours from total and normal hours.29 Shift Pay CalculatorFind shift pay from hours and rate.30 Sleep Debt Calculator 2Find sleep debt from needed and actual sleep.31 Study Time CalculatorFind study time from days and hours per day.32 Time to Seconds CalculatorConvert hours to seconds.33 Travel Time CalculatorFind travel time from distance and speed.34 Work Hours CalculatorFind work hours from days and hours per day.35 Break Time CalculatorFind total break time from breaks and minutes.36 Meeting Time CalculatorFind total meeting time from meetings and minutes.37 Commute Time CalculatorFind weekly commute time from daily minutes.38 Free Time CalculatorFind free time from total and work hours.39 Overtime Pay CalculatorFind overtime pay from hours and rate.40 Weekly Hours CalculatorFind weekly hours from daily hours and days.41 Monthly Hours CalculatorFind monthly hours from weekly hours.42 Yearly Hours CalculatorFind yearly hours from weekly hours.43 Years Ago CalculatorFind year from years ago.44 Time Hours CalculatorFind time hours from days and hours per day.45 Time Minutes CalculatorFind time minutes from hours and minutes per hour.46 Time Seconds CalculatorFind time seconds from minutes and seconds per minute.47 Time Days CalculatorFind time days from weeks and days per week.48 Time Weeks CalculatorFind time weeks from days and days per week.49 Time Months CalculatorFind time months from years and months per year.50 Time Years CalculatorFind time years from months and months per year.51 Time Schedule CalculatorFind time schedule total from tasks and minutes each.52 Time Clock CalculatorFind time clock minutes from hours.53 Time Calendar CalculatorFind time calendar weeks from days.54 Time Birthday Calculator 2Find time birthday age from birth year and party year.55 Time Anniversary CalculatorFind time anniversary years from start year and current year.56 Time Deadline Calculator 2Find time deadline hours from days and hours per day.57 Time Meeting Calculator 2Find time meeting total from meetings and attendees.58 Time Travel Calculator 3Find time travel days from distance and km per day.59 Time Work Calculator 3Find time work weeks from hours and hours per week.60 Time Study Calculator 3Find time study hours from subjects and hours each.61 Time Sleep Calculator 3Find time sleep percent from sleep hours and total hours.62 Final Time CalculatorFind final time total from weeks and days per week.63 Extra Time CalculatorFind extra time minutes from days and minutes per day.64 Time Week CalculatorFind time week hours from days and hours per day.65 Time Month CalculatorFind time month days from weeks and days per week.66 Time Year CalculatorFind time year weeks from months and weeks per month.67 Time Hour CalculatorFind time hour seconds from hours.68 Time Second CalculatorFind time second total from minutes.69 Time Day CalculatorFind time day hours from days.70 Time Weekend CalculatorFind time weekend days from weeks.71 Time Season CalculatorFind time season months from seasons.72 Time Night CalculatorFind time night hours from nights and hours per night.73 Time Morning CalculatorFind time morning minutes from days and minutes per day.74 Time Afternoon CalculatorFind time afternoon hours from days and hours per day.75 Time Evening CalculatorFind time evening minutes from days and minutes per day.76 Time Workday CalculatorFind time workday hours from days and hours per day.77 Time Schoolday CalculatorFind time schoolday hours from days and hours per day.78 Time Holidayday CalculatorFind time holiday hours from days and hours per day.79 Time Travelday CalculatorFind time travel hours from days and hours per day.80 Time Birthday Day CalculatorFind time birthday days from years and days per year.81 Time Festival Day CalculatorFind time festival days from festivals and days each.

Other tools

82 Time Exam Day CalculatorFind time exam hours from exams and hours each.83 Time Project Day CalculatorFind time project days from projects and days each.84 Time Date PlannerFind a future date from a start date and days.
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Formula shown on the page

Each page shows the formula it uses, so you can check the result yourself.

Works on mobile

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Start with a free calculator

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85 Days Between CalculatorFind days between two day numbers.86 Hours To Days CalculatorFind days from hours.87 Minutes To Seconds CalculatorFind seconds from minutes.88 Years To Days CalculatorFind days from years.