Age Calculator
Enter a birth date and a reference date to calculate exact age, total days lived, and days until the next birthday.
Runs locally in your browser. Your data never leaves your device.
Inputs
Results
- Years
- 26
- Months
- 6
- Days
- 12
- Total days
- 9,690
- Days until next birthday
- 172
How to calculate exact age
Calculate age from a birth date to any reference date in years, months, days, total days, and days until the next birthday.
How to use it
- Enter the birth date.
- Choose the date you want to calculate age on.
- Read the exact age breakdown and total days.
Common uses
Age calculators are useful for forms, eligibility checks, birthday planning, school records, and quick date-of-birth calculations.
Reference date
Changing the reference date lets you answer questions such as age on an event date, age at the end of a school year, or age on a future deadline.
Local calculation
Dates are calculated in your browser and are not sent to a server.
Age calculator FAQ
- Can I calculate age on a past date?
- Yes. Change the reference date to calculate age on that exact day.
- Does it count total days lived?
- Yes. The result includes total days between the birth date and reference date.
- Can the birth date be in the future?
- No. Future birth dates are treated as invalid input.