How does the age calculator work?

Enter a date of birth and the calculator shows the exact age in years, months and days, plus the total number of days lived and how many days remain until the next birthday. Everything is computed on your device — nothing is sent anywhere.

How is age in years, months and days calculated?

The calculator counts complete years from the birth date, then complete months, then the remaining days — the same way ages are stated officially. Leap years are handled automatically, and February 29 birthdays roll to March 1 in non-leap years.

How do I keep a birthday countdown on my iPhone?

Add the birthday to Kounts, a free countdown app for iPhone and Apple Watch. It counts down to the day, shows the age they're turning, repeats automatically every year, and can sit on your Home Screen as a widget.

Age Calculator: How Old Am I in Years, Months & Days?

Date of birth

Never miss the next birthday

Add birthdays to Kounts and get an auto-repeating countdown with the age they're turning, a Home Screen widget and a reminder — free, no ads.

Calculate an age

Never miss the next birthday