It uses Naegele's rule and provides a statistical estimate – the actual due date can vary depending on cycle length.
Date & Time
How many days until the due date, which calendar week does a date fall in, or how many working days lie between two dates? Calculators around date and time answer these questions for everyday life, pregnancy and working life.
From the pregnancy week and ovulation to a working time account with break deductions: all calculations take current public holidays and state (Bundesland) rules into account where relevant.
14 calculators in this category
Pregnancy
Due date, week of pregnancy and ovulation
Due Date Calculator
Enter the start of your last period – get your calculated due date instantly
Pregnancy Week Calculator
Enter the first day of your last period – see your current week instantly
Ovulation Calculator
Enter cycle start and length – get your ovulation date and fertile window instantly
Maternity Protection Calculator
Enter the expected date – calculate the pre-birth and post-birth period instantly
Baby Week Calculator
Enter the birth date – instantly see age in weeks, days and months plus upcoming checkups
Date & Age
Days between dates, age, calendar week and more
Date Calculator
Days, weeks, months between two dates – or shift a date forward/backward
Age Calculator
Enter birth date and reference date – instantly get years, months, days and total days
Calendar Week Calculator
Calendar week for any date – Thursday rule, ISO year and quarter
Day of the Week Calculator
Find the day of the week for any date in seconds
Countdown Calculator
Calculate days, weeks and months until any date
Time & Work
Working hours, time spans, working days and holidays
Working Days Calculator
Count Mon–Fri and subtract public holidays by state – for project planning, notice periods and vacation planning
Hours Calculator
Work hours minus break – get net hours instantly and for free
Time Span Calculator
Add up time spans in HH:MM format – get the total duration instantly
Public Holidays Calculator
All nationwide and state-specific public holidays for any year – including Easter & Whitsun
Frequently asked questions about Date & Time
Yes, statutory public holidays are automatically deducted depending on the selected federal state (Bundesland).