Age Calculator โ Calculate Exact Age from Date of Birth
The most complete free age calculator by JamberTech. Get your exact chronological age, biological age, Korean age, lunar age, dog & cat age, corrected age, school age and more โ down to the millisecond.
Chronological Age Calculator โ Calculate Age from Date of Birth
โ Please enter a valid date of birth.
Precise Age Breakdown โ Years, Months, Days, Hours, Minutes, Seconds & Milliseconds
Fun Life Facts Based on Your Age
Your Astrological & Cultural Profile
Current Year Progress
Next Birthday Countdown
Korean Age Calculator โ Traditional System vs International Age
The Korean age calculator applies the traditional Korean system where a person is considered 1 year old at birth and gains an additional year every January 1st โ not on their birthday. This age calculator Korean method was used across South Korea on official documents and hospital records for centuries.
In June 2023, South Korea officially adopted the international (Western) age standard for all legal and administrative purposes. However, the traditional Korean age system remains deeply embedded in everyday conversation and culture. Many Koreans still use both systems interchangeably.
Formula to calculate Korean age: Korean Age = Current Year โ Birth Year + 1.
Lunar Age Calculator โ Calculate Your Lunar Age & Chinese Lunar Age
Calculating lunar age is based on the traditional Chinese lunar calendar, used for thousands of years across East Asia. Your lunar age is typically 1โ2 years higher than your Gregorian age because the lunar year is roughly 354 days โ about 11 days shorter than the solar year.
To calculate your lunar age (or use a my lunar age calculator): generally, add 1 to your Western age and check whether Chinese New Year has passed in the current year. The Chinese lunar age calculator and lunar calendar age calculator are used in traditional Chinese medicine (TCM) and for astrology compatibility readings.
To calculate lunar age precisely, the exact Chinese New Year date for your birth year is required for comparison against your Gregorian birth date.
Biological Age Calculator โ Free Body Age, Metabolic Age & Exercise Age Estimator
A biological age calculator โ also known as a bio age calculator, body age calculator, or exercise age calculator โ estimates how old your body actually functions compared to your calendar age. Unlike a chronological age calculator, this tool considers lifestyle factors that directly impact cellular aging.
For a deeper assessment like the biological age calculator Yale research model, blood biomarkers and DNA methylation testing would be required. This free biological age calculator uses lifestyle proxies as an estimate.
How to Calculate Metabolic Age
How to calculate metabolic age: Metabolic age compares your Basal Metabolic Rate (BMR) to the average BMR for your age group. How is metabolic age calculated precisely requires body composition data via DEXA scan or bioelectrical impedance analysis. The metabolic age calculator female version also factors in hormonal influences on metabolism. Calculate metabolic age at home using BMR formulas (Mifflin-St Jeor) compared to population averages for your age group.
How to Calculate Your Biological Age
How to calculate biological age with scientific precision requires epigenetic clock testing (e.g. Horvath's clock), telomere length analysis, or the GlycanAge test. How to calculate your biological age at home is an estimation via lifestyle markers. Calculate biological age results serve as useful motivational benchmarks, not clinical diagnoses.
Corrected Age Calculator โ Adjusted Age for Premature Babies, ASQ & Developmental Screening
The corrected age calculator and adjusted age calculator are used for premature infants. A baby's corrected gestational age โ also called the premature corrected age โ subtracts the weeks born early from the baby's chronological age to give the age the baby would be if born on their due date.
The ASQ age calculator, Brigance age calculator, and ages and stages calculator all rely on corrected age for accurate developmental milestone screening. The ages stages age calculator and age calculator ages and stages determine which questionnaire version to administer. Use corrected age for all developmental assessments until the child reaches 2โ3 years old.
Dog Age Calculator & Cat Age Calculator โ Convert Pet Age to Human Years
Use this pet age calculator to convert your pet's age into human years. Supports the dog age calculator, cat age calculator, puppy age calculator weeks to months, and baby age calculator weeks to months.
Dog Age to Human Years โ Accurate Dog Age Calculator
The traditional "multiply by 7" dog age calculator rule is scientifically outdated. The modern dog age to human age calculator uses a logarithmic DNA methylation formula: Dog Age = 16 ร ln(human years) + 31. Dogs age rapidly in early life and slow down as adults. This dog age calculator app-style result reflects true biological aging. The grow a garden age calculator and pet age calculator grow a garden (Roblox game) use simpler multiplier conversions.
Cat Age Calculator โ Cat Years to Human Years
The cat age calculator uses a stage-based conversion: Year 1 = 15 human years, Year 2 = 24 human years, each year after = 4 human years. This math cats age calculator-style formula reflects your cat's actual life stage โ kitten, junior, prime, mature, senior, or geriatric.
Puppy Age Calculator โ Weeks to Months
The puppy age calculator weeks to months is used by breeders and vets for early development milestone tracking. The baby age calculator weeks to months and calculate baby's age tools help parents and pediatricians track newborn growth using both corrected and chronological methods.
School Age Calculator โ Grade Eligibility, LAUSD, USSSA, Little League & Perfect Game Age
The school age calculator determines what grade a child will enter based on their date of birth and the local school district's age cutoff date. The LAUSD age calculator (Los Angeles Unified School District) uses September 1st as its enrollment cutoff. The USSSA age calculator, USSSA baseball age calculator, and USSSA age calculator baseball determine youth sports division eligibility. The Little League age calculator and perfect game age calculator are used for tournament division placement in youth baseball.
Dating Age Calculator โ Half Your Age Plus 7 Rule & Acceptable Age Gap
The dating age calculator uses the popular half age 7 and minus 7 double calculator โ the "half your age plus seven" rule. This acceptable age gap calculator and online age difference calculator gives the socially accepted minimum and maximum partner age range. It is a social guideline only โ not a legal standard.
Tree Age Calculator โ Estimate the Age of a Tree Without Cutting It
The tree age calculator and age of tree calculator estimate how old a tree is without felling it. Calculating tree age non-destructively involves measuring the trunk circumference (cm), dividing by ฯ for the diameter, then dividing by the species' average annual radial growth rate. This calculate the age of a tree method is used by arborists, ecologists, and conservation researchers.
Bone Age, Menopause, Age Grade, CSPA, Accelerated Aging & More Special Age Calculators
Bone Age Calculator
A bone age calculator assesses skeletal maturity in pediatric radiology by comparing a hand/wrist X-ray against the Greulich-Pyle or Tanner-Whitehouse reference charts. Bone age is used to diagnose growth disorders, predict adult height, and guide endocrinology treatment. A medical radiologist is always required โ no online tool replaces a clinical assessment.
Menopause Age Calculator
The menopause age calculator estimates perimenopause and menopause onset based on maternal menopause age, smoking history, BMI, and reproductive history. The average natural menopause age is 51 (range 40โ58). This is informational only โ always consult a healthcare provider for personalised guidance.
Age Grade Calculator & Age Graded Running Calculator
The age grade calculator, age grading calculator, age graded running calculator, and age graded calculator are used in competitive athletics. An age-graded score adjusts your race time against the world record for your age and gender, producing a percentage score. Higher is better. Used by World Masters Athletics and USATF.
CSPA Age Calculator
The CSPA age calculator (Canadian Sport Parachuting Association) determines skydiving licence requirements and jump currency by age and activity date. Requirements vary by licence level (A, B, C, D).
ASQ Age Calculator โ Ages & Stages Questionnaire
The ASQ age calculator and age calculator ASQ compute a child's corrected age to select the correct Ages & Stages Questionnaire form (ASQ-3 or ASQ:SE-2). The ages and stages age calculator is widely used by Head Start, Sure Start, and early childhood programmes globally.
Accelerated Aging Calculator
The accelerated aging calculator is used in pharmaceutical, food, and medical device manufacturing. Based on the Arrhenius equation, it converts short high-temperature lab tests into equivalent real-world shelf-life years for product stability testing.
Farmers Carry by Age & FTP Calculator by Age and Gender
The farmers carry by age calculator provides age-adjusted strength benchmarks for the farmer's carry exercise. The FTP calculator by age and gender estimates your Functional Threshold Power in cycling โ the highest power output sustained for ~1 hour โ adjusted for age and sex norms.
Blood Pressure by Age & 529 Calculator by Age
The blood pressure calculator by age shows normal systolic and diastolic ranges across age groups. The 529 calculator by age helps parents estimate required savings in a 529 college fund based on the child's current age and projected enrolment costs.
Super Duper Age Calculator & Test Age Calculator
The super duper age calculator refers to a comprehensive all-in-one tool โ exactly what this page provides. The test age calculator, calculate test age, and testing age calculator verify student age eligibility for standardised tests where age must fall within a defined range on the test date.
Retirement Age Calculator โ How Many Years, Days & Hours Until You Retire?
Calculate Age from Date of Birth in Excel โ Formulas, Methods & Examples
Common searches include excel calculate age from dob, formula to calculate age in excel, calculating ages in excel, how to calculate age in excel using date of birth, and age calculator in excel. Here are the most accurate methods for calculating age from date of birth in excel.
Basic Age in Complete Years
=DATEDIF(A2, TODAY(), "Y")Returns complete years. A2 = date of birth cell.
Covers: calculate age from dob in excel, age calculation from birth date in excel.
Years, Months & Days Combined
=DATEDIF(A2,TODAY(),"Y")&" Yrs, "&DATEDIF(A2,TODAY(),"YM")&" Mo, "&DATEDIF(A2,TODAY(),"MD")&" Days"
DD/MM/YYYY Text Input
=DATEDIF(DATE(RIGHT(A2,4),MID(A2,4,2),LEFT(A2,2)),TODAY(),"Y")For how to calculate age in excel in dd/mm/yyyy when stored as text string.
Simple Division
=INT((TODAY()-A2)/365.25)Quick estimate. For calculating age from dob in excel where precision is not critical.
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Frequently Asked Questions โ Age Calculator
About This Age Calculator by JamberTech
This age calculator by JamberTech is designed to be the most comprehensive free online age tool available. Whether you need a standard chronological age calculator, a professional calculate chronological age tool, or a super duper age calculator that handles everything โ this single page covers it all.
We cover how to calculate chronological age manually, the age adjusted calculator methodology for medical use, the USSSA baseball age calculator for youth sports, the LAUSD age calculator for school enrollment, and the age grade calculator for competitive runners. Our Excel section answers every spreadsheet age formula question, including calculate age 26/11/1988-style date parsing.
All calculations are for informational and educational purposes only. For medical, legal, or official use, verify with a qualified professional.