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An age calculator computes your exact age in years, months, and days from your birth date to today (or another target date). Useful for official documents, medical records, eligibility verification, and birthday countdowns.

ステップバイステップガイド

1. 1Subtract birth year from current year for years
2. 2Adjust if the birthday hasn't occurred yet this year (subtract 1 year)
3. 3Calculate remaining months and days similarly
4. 4Leap day birthdays (Feb 29): age counted Feb 28 or March 1 in non-leap years (varies by jurisdiction)

解いた例