Age Calculator Online | Calculate Exact Age in Years, Months & Days
Calculate your exact age in years, months, days, hours, and even minutes with our free online age calculator. This precise time measurement tool is perfect for determining accurate age for legal documents, tracking developmental milestones for children, planning birthday celebrations, and calculating time periods between any two significant dates.
Age Calculator
Typical Use Cases
The Age Calculator serves a variety of practical purposes for both personal and professional use:
- Determining exact age for legal or administrative requirements
- Planning birthday celebrations or anniversary events
- Calculating pregnancy terms and expected delivery dates
- Tracking developmental milestones for children
- Measuring project timelines or contract durations
- Genealogy research and family history documentation
How Age Calculation Works
Age calculation involves precise counting of calendar units between two dates, accounting for:
- Calendar Irregularities: Different months have different numbers of days
- Leap Years: February has 29 days in leap years, affecting calculations
- Time Zones: Can affect the exact time when crossing international date lines
- Rounding: Age may be expressed differently depending on whether rounding occurs
Our calculator handles these complexities automatically, giving you accurate results for any date pair.
Age Milestones
Different societies recognize various age milestones for legal and cultural purposes:
- 13 years: Legal age for social media accounts in many countries
- 16-18 years: Age of majority/consent in many jurisdictions
- 21 years: Legal drinking age in the United States
- 65+ years: Traditional retirement age in many countries
- 100 years: Centennial birthday, often recognized with special honors