Use our fast, mobile-friendly date and time calculators to find date differences, calculate your age in years, months, and days, work out business days, track menstrual cycles, and even try the traditional Chinese gender predictor. All tools run instantly in your browser with secure PHP processing.
Find your exact age in years, months, days, and total days lived, plus days until your next birthday.
Measure the span between two dates in years, months, days, and total days. Optionally exclude weekends for working days.
Count business days between two dates while skipping weekends and custom holidays.
Estimate upcoming periods, ovulation days, and fertile windows based on your average cycle.
Folklore-based tool predicting baby gender from mother’s age and month of conception.
Count down the days, weeks, and months until any future date.
See when your next birthday is, what weekday it falls on, and how old you will turn.
Add or subtract days, months, and years from a base date to find the resulting day.
Find the ISO week number and year for any date.
Compare two birthdays to see who is older and by how much.
Calculate duration between two date-time points in days, hours, and minutes.
Find out what weekday a given date is, was, or will be.
See which day of the year a date is and how many days remain.
Check what your age will be on any chosen date in the future or past.
Discover the weekday you were born, days since birth, and fun milestones like 10,000 days.
Track relationship or event length, and see when the next anniversary occurs.