Exact age in years, months, days, plus days until your next birthday.
Enter a date of birth to get the precise age in years, months and days, along with total days alive and a countdown to the next birthday.
100% client-side — zero uploads, maximum privacy
Instant results — no waiting for server processing
Secure — your data never leaves your browser
Free to use — no sign-up required
Real-time calculation as you type — no submit button needed
Step-by-step breakdowns for full transparency
Amortization schedules, unit conversions, and health formulas
Bookmarkable results for quick reference
Works offline after initial page load
Calculate exact age in years, months, and days
Determine eligibility dates for age-restricted services
Compute age differences between two dates
Verify date-of-birth entries in registration forms
Generate age-based reports for demographic analysis
It uses your local timezone for 'today', which is what you want for birthdays.
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Days between dates, add/subtract days from a date, weekday lookup.
Convert between decimal, hex, binary and octal with ASCII view.
Body Mass Index with healthy-range guidance.