Time

Calculate days remaining until a target date, with weeks, months, and hours breakdown.

Calculate instructional days, class meeting days, and contact hours for any academic semester.

Calculate a future or past date by adding or subtracting business days. Skips weekends and public holidays automatically.

Calculate your exact age in years, months, and days from your date of birth. Find your total days lived and days until your next birthday.

Count working days between dates or add business days to a start date with U.S. and German holiday calendar options.

Calculate the exact number of days between two dates with standard, inclusive, and business day modes.

Calculate how many days in a month. See the length of each month, the average days per month, and convert between days, months, and weeks.

Calculate total days, working days, and weekend days for any year. Includes leap year detection.

Convert hours and minutes into decimal hours for timesheets and payroll, with the total minute count shown alongside.

Work out your dog's due date and whelping window from the breeding date — canine gestation averages 63 days, with a normal range of 58 to 68 days.

Calculate exact grading time and visualize how weekend exam marking pushes your weekly teacher workload past the legal 41-hour limit.

Calculate your statutory teaching load, track actual hours, and instantly determine your weekly overtime or underload balance.

Calculate the exact morning and evening golden hour start and end times for any location and date to perfectly plan your photography or outdoor event.

Convert weeks to hours or hours to weeks instantly.

Calculate exactly how long until you turn 18. Enter your birth date for a precise countdown in days, hours, and weeks.

Calculate your remaining weeks of life based on the 4,000 Weeks philosophy and actuarial data.

Calculate exact legal maternity leave dates (Mutterschutz) in Germany, including post-birth extensions and school holiday overlaps for teachers.

Convert months to minutes using the average month length.

Convert months into nanoseconds, seconds, minutes, days, weeks, and years using the mean Gregorian month.

Find which calendar quarter (Q1–Q4) a date falls in, how many days into the quarter you are, and how many days remain in the quarter.

Convert seconds, minutes, hours, days, weeks, months and years. Free and instant — and it tells you which year length the answer assumes.

Find the ISO 8601 week number (Kalenderwoche / KW) for any date, plus the day of the year and the days remaining.

Calculate weekend days, full weekends, and working days for any month and year.