Age Calculator: inputs and options
Since the Age Calculator has no file upload, the "formats" here describe the date inputs and output units you can use.
Input fields
| Field | What to enter | Example |
|---|---|---|
| Birth date | The person's date of birth | 1990-05-14 |
| Reference date (optional) | The date to calculate age as of; defaults to today | 2026-08-28 |
Date entry options
- Date picker — click to open a calendar and choose a day
- Typed input — enter day, month, and year manually
- Year range — any year from far in the past to the present is accepted
Reference date
By default the calculator uses today's date. Changing the reference date lets you compute age for a past date (records, applications) or verify a future milestone.
Output units
The same age is shown in multiple ways:
- Years, months, and days
- Weeks and days
- Total days, hours, and minutes
- Next birthday date with days remaining
Verdict
The Age Calculator takes two dates — birth and reference — and returns your age in every useful unit.