Chronological Age Calculator
Calculate chronological age in years and months for psychological and educational testing. Enter values for instant results with step-by-step formulas.
Reviewed by Abdullah, Technical Content Specialist
Formula
Age = Current Date - Birth Date (years, months, days)
Calculates exact age in years, months, and days. Also shows total days alive, hours, and minutes.
Worked Examples
Example 1: Born June 15, 1990
Problem:Date of birth: 1990-06-15
Solution:(Depends on current date)
Result:Exact years, months, days
Frequently Asked Questions
How do I calculate my pet's age in human years?
The old rule of multiplying by 7 is inaccurate. Dogs age faster in early years: a 1-year-old dog is roughly equivalent to a 30-year-old human. After age 2, each dog year equals about 4-5 human years, varying by breed size. Cats reach human equivalence of 15 at age 1.
How much sleep do different age groups need?
Newborns need 14-17 hours, infants 12-15, toddlers 11-14, preschoolers 10-13, school-age children 9-11, teens 8-10, adults 7-9, and seniors 7-8 hours. Consistency matters more than exact hours. Going to bed and waking at the same time improves sleep quality significantly.
Reviewed by Abdullah, Technical Content Specialist · Editorial policy