Date & Age Calculator

Calculate age from a birth date, days between two dates, or add/subtract days from a date — all in your browser.

Birth date

As of (optional)

Result

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Example

Born 2000-01-15 as of 2026-01-15 → 26 years, 0 months, 0 days. Days between 2026-01-01 and 2026-01-31 → 30 days.

Calendar difference: full years, then remaining months, then remaining days — not a fixed 30-day month average.

“Days between” uses the absolute difference of calendar dates (end − start), so Jan 1 → Jan 31 is 30 days.

Count business days between two dates, skipping weekends and holidays.