Age Calculator Widget

How it works

An age calculator converts a date of birth into a precise age breakdown: years, months, days and the total number of days lived. It does this by comparing the date of birth to today's date and calculating the exact difference.

The calculation accounts for months with different lengths and handles year boundaries correctly — for example, someone born on 31 January will correctly show age 1 month on 28 February in a non-leap year.

Common uses:

• Age verification pages: membership sites, adult content, gambling — show a visitor their exact age based on DOB entry
• Healthcare and wellness: BMI calculators, health risk assessments, fitness programmes — age is often a required input
• Education: school enrollment checks, university course eligibility, childcare age group verification
• Legal and admin: driving licence applications, pension eligibility, insurance underwriting

Age in days: the total days count is particularly useful for children (how many days old is my baby?), legal processes that count from birth, or anyone tracking a precise age milestone.

Age vs age in months: babies and young children are often described in months ("she's 18 months old"), while adults typically use years. This calculator shows both, giving visitors the format that's most useful to them.

How to add it