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Age Gap Calculator

Compare two birth dates to find the exact age difference between two people — years, months, days and total days.

First person’s birth date

Second person’s birth date

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How it works

age gap = older birth date to younger birth date, walked as whole years, then months, then leftover days · also shown as total calendar days

The gap between two people is just the distance between their birth dates — it never changes as they age, because both grow older in lockstep. The calculator identifies who is older, then walks the calendar from the earlier birth date to the later one for an exact years-months-days figure, and also gives the total calendar days for a single clean number. Order of entry does not matter; it always reports a positive gap.

Worked example

One person born July 10, 1990 and another born February 25, 1993: the first is older by 2 years, 7 months, 15 days — about 960 days apart.

Frequently asked questions

Does the age gap change over time?

No. Because both people age at the same rate, the difference between their birth dates is fixed for life — the exact same number of days every day.

Does it matter which birth date I enter first?

No. The calculator finds the earlier date automatically and always reports a positive gap, telling you which person is older.

How is this different from the age difference calculator?

Both measure the span between two birth dates. This variant focuses on comparing two people directly — naming who is older and giving the gap in several units — rather than a person’s age at a reference date.

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Age Difference Calculator

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Work out an exact age in years, months and days on any date — plus decimal age, total months, weeks, days and hours lived, the countdown to the next birthday, the weekday you were born and upcoming day-count milestones.

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Count the exact days between two dates — optionally including the end date — and see the gap in years, months and days, weeks, hours and minutes, plus working days with weekends and US, Mexican or Spanish holidays left out.

Days Worked (Tenure) Calculator

Count how long you have worked somewhere — years, months and days of tenure, total days, days on payroll, working days without weekends and public holidays, estimated hours, decimal years, days worked in each calendar year and your next work anniversary.

This calculator is for educational purposes. Double-check important results before acting on them.