Age and Sleep

Calculate exact chronological age from a date of birth to today or any as-of date, with years, months, days and total-day breakdowns.

Calculate how many full days you have lived from a birth date or event date, with weeks, hours, seconds and day-milestone dates.

Convert cat years to human years, see your cat's life stage, and compare common age milestones using the standard first-year, second-year, then four-years-per-year model.

Convert dog years to human years using a size-aware age model, with life-stage guidance and a chart for toy, small, medium, large and giant dogs.

Find your Western tropical sun sign from your birth date, with date ranges, element, modality, ruling planet, decan, cusp note and an entertainment-only astrology caveat.

Find your Chinese zodiac animal, element, yin-yang polarity and stem-branch year from a birth date, with Chinese New Year boundary handling for January and February birthdays.

Calculate live exact age from date and optional time of birth, with years, months, days, hours, minutes, seconds and total time lived.

Calculate age in full calendar months and remaining days from a date of birth to today or any target date.

Find the next birthday date, days until birthday, birth weekday, upcoming birthdays and live time-lived milestones.

Calculate bedtime or wake-up time options from 90-minute sleep cycles, fall-asleep time and age-based sleep-duration ranges.

Pick alarm time options from your bedtime, fall-asleep estimate and 90-minute sleep cycles, with age-based sleep-duration guidance.