Free Online Age Calculators
A free directory of 103+ age calculators — from your exact age in years, months and days to pet years, baby milestones and retirement planning. No registration required.
Popular Age Calculators
Our most-used tools — the full collection is in the directory
Chronological Age Calculator
Calculate your exact age in years, months, and days from your date of birth
Calculate NowAge Difference Calculator
Find the exact age gap between two people in years, months, and days
Calculate NowBaby Age Calculator
Track your baby's age in weeks, months with developmental milestones
Calculate NowPet Age Calculator
Convert dog and cat years to human years based on size and species
Calculate NowBiological Age Explained + Habit Score
What biological age is, plus an educational habit score (not a lab test)
Calculate NowRetirement Age Calculator
Time to retirement, Social Security full retirement age and a savings projection
Calculate NowGestational Age Calculator
Weeks pregnant and due date from LMP or conception (280-day rule)
Calculate NowDog Age Calculator
Convert dog years to human years using a modern size-adjusted formula with life stage and expectancy
Calculate NowCat Age Calculator
Convert cat years to human years using the AAFP feline life-stage formula
Calculate NowKorean Age Calculator
Traditional, counting and international Korean age
Calculate NowBrowse by Category
Every calculator is grouped into a category hub
Health & Body
Biological, metabolic, heart and fitness age estimates
Sports & School
League eligibility, school placement and competition ages
Baby & Child
Baby age, adjusted age for preemies and milestones
Money & Planning
Retirement age, savings timelines and career milestones
Pets & Nature
Dog, cat, horse, bird and plant age conversions
Calculate Age in Excel & SQL
Need to calculate age in spreadsheets or databases? We've got you covered with comprehensive guides and ready-to-use formulas for Excel, Google Sheets, and SQL.
- Excel DATEDIF formulas for age calculation
- Calculate age from DD/MM/YYYY format
- SQL age calculation queries
// Excel Formula Example
=DATEDIF(A1,TODAY(),"Y") & " years, " &
DATEDIF(A1,TODAY(),"YM") & " months, " &
DATEDIF(A1,TODAY(),"MD") & " days"
// SQL Example
SELECT TIMESTAMPDIFF(YEAR,
birth_date, CURDATE()) AS age
FROM users;Can't Find the Calculator You Need?
Suggest a new age calculator or vote on requests from other visitors. We build the most-requested tools first.
Request a CalculatorCareful Date Math
Date-based calculators account for leap years and varying month lengths. Lifestyle and health tools provide estimates, not medical measurements.
Easy to Use
Simple interfaces with instant results. No complicated forms or unnecessary steps.
Privacy First
All calculations happen in your browser. We don't store or transmit your personal data.