Age & Date Calculator
Exact age and gaps between dates
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About the Age & Date Calculator
Calculate exact age in years, months, and days from a date of birth — or the precise gap between any two dates. Also shows total days, weeks, hours, days until the next birthday, and which weekday the start date fell on. Useful for forms, anniversaries, project durations, and curiosity.
How to use
- 1Pick the date of birth (or start date).
- 2Pick the as-of date (defaults to today).
- 3Read the exact age and date-gap breakdown.
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Age & Date Calculator is part of DevKit — 100 free, privacy-first tools for developers, students, and everyone, built by Minhazul Ashim. Everything runs in your browser; your data never leaves your machine.