Time

Most used

• Days in a Year CalculatorHow many days a year has — 365 or 366 — under the Gregorian leap rule, century exceptions included.
• Months to Minutes CalculatorConvert months into minutes using the average Gregorian month of 30.436875 days, and back again.
• Time Unit ConverterConvert seconds, minutes, hours, days, weeks, months and years — you pick the year.
• Business Days in a MonthCount the working days in any month, with a Saturday-Sunday or Friday-Saturday weekend.

All, A–Z

• Academic Semester Days CalculatorCount the instructional days in a semester: the full span minus weekends, minus the non-teaching weekdays you enter.
• Age CalculatorWork out your exact age from your date of birth — in completed years, in completed months, or in days lived, on today or any other day.
• Business Days CalculatorCount the working days between two dates. Weekends are removed, and US federal or German nationwide holidays can be deducted too.
• Days Between Dates CalculatorCount days between two dates, including both dates or only Monday to Friday. Choose a counting rule and check examples; holidays are not deducted.
• Days in a Month CalculatorHow many days a month has on average — 30.436875 — and what any number of months adds up to in days.
• Days Until CalculatorCount the days until any date — a birthday, a holiday, a deadline. A date that has already passed comes out as a negative number.
• Days Until You Turn 18Count the days to your 18th birthday. Enter your date of birth — leap days are included, and a 29 February birthday falls on 1 March.
• Decimal Hours ConverterTurn hours and minutes into decimal hours for a timesheet — 8 h 30 min is 8.5, because minutes are sixtieths, not tenths.
• German Maternity Protection PeriodWork out the German Mutterschutz dates under § 3 MuSchG: six weeks before the due date, eight or twelve after, plus the carry-over for an early birth.
• Hours in a Week CalculatorA week is 168 hours. Convert any number of weeks into hours, or a pile of hours back into weeks.
• How Many Weeks Have I Lived?Count your life in weeks against Oliver Burkeman's four thousand. Enter a date of birth and see the weeks lived, or the weeks still to come.
• ISO Week Number CalculatorFind the ISO 8601 week number for any date. Weeks run Monday to Sunday, and week 1 is the week holding the year's first Thursday.
• Months to Time ConverterTurn a number of months into seconds, minutes, hours, days, weeks, or years using the mean Gregorian month of 30.436875 days.
• Quarter of the Year CalculatorFind out which calendar quarter — Q1, Q2, Q3 or Q4 — a date falls in, and see exactly where the quarter boundaries lie.
• Teacher Grading Time CalculatorHow long a stack of exams takes to grade: papers times minutes each. You supply the minutes — no official figure exists.
• Teaching Load Calculator (North Rhine-Westphalia)Your weekly lesson target in North Rhine-Westphalia: the statutory load per school type, cut pro rata and reduced for age or disability.
• Work Hours CalculatorCalculate hours between start and end times, subtract your break and see decimal hours. Select next day for overnight shifts; includes worked examples.