Age Difference Calculator
Calculate the exact age difference between two people or dates. Compare birthdays and anniversaries. Free, instant, and accurate age difference calculation.
Person 1
Person 2
Enter two dates of birth to calculate the age difference
How to Use Age Difference Calculator
Enter First Date
Select the first date of birth using the date picker. You can optionally add a name to personalize the results.
Enter Second Date
Select the second date of birth. The calculator automatically determines which person is older.
View Difference
See the exact age difference in years, months, and days, plus detailed breakdowns in weeks, hours, and minutes.
Why Use Our Age Difference Calculator?
Precise Calculations
Calculate exact age differences down to the minute using accurate date arithmetic that accounts for leap years.
Compare Anyone
Compare ages between siblings, couples, friends, celebrities, or any two people. Perfect for curiosity or relationship insights.
Multiple Units
See age differences in years, months, days, weeks, hours, and minutes simultaneously for comprehensive comparison.
Optional Names
Add names to personalize your results and make them easier to read and share with others.
Private & Secure
All calculations happen in your browser. Birth dates are never sent to any server or stored anywhere.
100% Free
No ads, no hidden costs, no signup required. Unlimited age difference calculations forever.
Frequently Asked Questions
How is the age difference calculated?
The calculator uses precise date arithmetic to find the exact difference between two dates. It accounts for leap years, varying month lengths, and calculates down to the minute for maximum accuracy.
Does the order of dates matter?
No! The calculator automatically determines which date is earlier and calculates the difference accordingly. It will always show who is older regardless of the order you enter the dates.
Can I compare dates other than birthdays?
Absolutely! While designed for comparing ages, you can use this tool to calculate the difference between any two dates - anniversaries, historical events, project timelines, etc.
Why do I need to add names?
Names are completely optional. They just make the results easier to read by showing "John is X years older than Jane" instead of "Person 1 is X years older than Person 2".
What if the dates are very close together?
The calculator works accurately even for dates that are just days or hours apart. It will show 0 years, 0 months, and the exact number of days, hours, and minutes of difference.
Can I use this for twins or people born on the same day?
Yes! If both dates are the same, the calculator will show 0 difference across all units. For twins born hours apart, you'll see the difference in hours and minutes.
How does this handle leap years?
The calculator automatically accounts for leap years (February 29th). If someone was born on a leap day, the calculations remain accurate across all years, whether leap or not.
Is this useful for relationship age gaps?
Many people use this tool to calculate and understand age gaps in relationships. Remember that age difference is just one factor in any relationship, and what matters most is mutual respect and compatibility.