Accurate, Instant & Private Age Calculator

Calculate Your Age

How old are you, exactly?

Instant, precise age calculations — in years, months, days, hours, and beyond.

Your Date of Birth

calculated as of

Reference Date

Dedicated calculators for precise chronological, comparative, and milestone lookups

Compare two birthdates side-by-side — partners, friends, or family members. See the exact gap in days.

Find out the exact total number of days you have been alive since birth, plus milestone day counts.

View your lifespan calculated purely in weeks, complete with developmental and life phase insights.

Accurate chronological months breakdown — ideal for developmental records and milestone tracking.

Detailed decimal and fractional years lived, complete with exact leap year adjustments.

Test your birthdate against any cutoff date and minimum/maximum age requirements with 100% precision.

Calculate your Western astrological sun sign, ruling element, planet, birthstone, and compatible matches.

Find your Lunar Year animal (Rat to Pig), celestial element, Yin/Yang polarity, and lucky numbers.

Convert dog years to human years with modern veterinary breed-weight science, debunking the 7-year myth.

Calculate accurate human age equivalents for cats, rabbits, hamsters, horses, and birds.

Printable birthday certificates for children and classroom celebrations with 5 themes and custom signatures.

Organize and print a 12-month calendar poster of student birthdays for bulletin boards and classroom doors.