Date & Time
Age Calculator: Calculate Exact Age
Calculate exact age in years, months, and days.
Exact age requires accounting for month lengths and leap years.
How It Works
Years first, then months, then days.
Leap Years
Every 4 years (century ÷400). Feb 29: celebrate Feb 28 or Mar 1.
Why Age Matters
- Legal: voting, driving, retirement
- Medical: dosage, milestones
- Financial: insurance, retirement
Frequently Asked Questions
Age in months?
Years×12 + remaining months.
Leap year?
Divisible by 4, centuries by 400.
Feb 29 birthday?
Feb 28 or Mar 1 in non-leap years.