About this tool
Calculate exact age in years, months and days between a date of birth and any reference date. Useful for paperwork, health forms, and "how old will I be on…" questions.
Formula
years + months + days, computed by subtracting calendar fields and borrowing across month/year boundaries.
Worked example
DOB 1990-06-15, as-of 2026-05-05 → 35 years, 10 months, 20 days.
Notes
Total days uses exact day arithmetic. Total months is years × 12 + months and ignores residual days.