About the Age Calculator
Calculate Your Exact Age
Enter your date of birth and this calculator tells you your age in years, months, weeks, and days. It accounts for leap years and the exact number of days in each month to give a precise result.
What the Result Shows
- Age in complete years (what most people consider their age)
- Additional months and days beyond the last birthday
- Total days lived — a useful figure for medical and legal contexts
- Total weeks lived
Other Uses
Beyond personal age, this calculator works for anything with a start date: how old is a company, how long has a contract been running, or how many days old a baby is.
Common Use Cases
- Finding your exact age in days, weeks and months
- Checking age eligibility (e.g. must be 18 on a specific date)
- Calculating how old a business, product, or relationship is
- Medical age calculations