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Everyday Tools
Free online tool
Calculate an age from two dates and see the result in years, months and days.
Tool workspace
Enter the details the tool needs, then review the result before using it.
Checking ages for forms, planning milestones, or understanding the exact time between a birth date and another date.
Use the date on which you want the age measured as the end date rather than assuming today's date.
Results follow calendar dates; they are not a substitute for an authority's legal definition of age.
How to use it
Use the controls above, check the result, then copy or download it when available.
Yes. The calculator can compare any valid start and end dates.
Use this tool whenever you need: Checking ages for forms, planning milestones, or understanding the exact time between a birth date and another date. It offers a fast, client-side workflow without sign-ups, installation or complex software.
Yes. All processing executes locally in your browser using client-side JavaScript. Your inputs, files and calculations remain private and are never uploaded to our servers.
Use the date on which you want the age measured as the end date rather than assuming today's date. Important note: Results follow calendar dates; they are not a substitute for an authority's legal definition of age.
Related
Date utility
Compare a date of birth with any date to get an exact age in years, months, and days.
1. Your dates
Pick a birth date and the date you want to measure against.
2. Your result
Age on selected date
26 years, 8 months, 15 days
From 1 Jan 2000 to 16 Sept 2026.
Total days
9,755
Calendar days between the two dates.
Date range
2000-01-01 to 2026-09-16
Calculated age: 26 years, 8 months, 15 days.
Age uses calendar years, months and days. Total days is calculated from calendar dates.