Due date calculator
Calculate your estimated due date (EDD) from your last menstrual period (LMP) using Naegele's rule. See gestational age in weeks and days until delivery — free.
Current for 2026Methodology →
Age calculator
Enter your date of birth and a calculation date — the calculator returns your exact age in years, months and days, plus days until your birthday.
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How we calculate age
We subtract the birth date from the calculation date, accounting for leap years and different month lengths. Days to birthday — from today to the next anniversary.
Example: born 15 January 1990
For a birth date of 15 Jan 1990 and 9 Jun 2026: age is 36 years, 4 months and 25 days — about 13,294 days in total.
Frequently asked questions
How do I calculate age in years and months?
Subtract the birth date from today. Our calculator returns exact years, months and days.
How old am I if I was born in 1990?
In 2026 — about 36 years (depending on month). Enter the exact date for a precise result.
How do I count days until my birthday?
The calculator automatically shows how many days are left until the next birthday.
Does the calculator account for leap years?
Yes — calculations are based on exact dates and account for leap years.
What date format should I use?
YYYY-MM-DD or via the date picker. E.g. 1990-06-15 is 15 June 1990.
How many days is 10,000 days from birth?
10,000 days ≈ 27.38 years. The calculator shows the total number of days.
When do I turn 18?
Exactly 18 years after your birth date — enter it and the calculator will show the result.
What is metabolic age?
Metabolic age is the biological age of your body based on BMR — see the BMR calculator.
Can I calculate age in the future?
Yes — enter a future date as the calculation date to see how old you will be.
Does the calculator show hours and minutes?
In this version — years, months and days. Hours require the exact time of birth.
Result based on the Gregorian calendar. Accurate to the day.