정확한 나이 계산: 년, 월, 일

Seems simple — "I'm 30" — but exact age matters in many contexts:

• Legal: Minimum age to drive (16-18), vote (18), drink (18-21), retire (60-67). One day can make the difference.
• Insurance: Life/health premiums change at certain ages. Buying at 29y 11mo can be cheaper than at 30.
• Immigration: Many visas have age limits (Work and Holiday: under 30/35).
• Medicine: Pediatric dosages calculated by exact age in months.
• Sports: Youth categories defined by exact birth date, not year.

Calculate your exact age with the NexTools age calculator.

The NexTools calculator displays:

• Age in years, months, days
• Total days lived
• Total weeks
• Total hours
• Days until next birthday

For date-to-date differences, use the date difference calculator.

Example: Born Oct 5, 1995. Today: Mar 17, 2026.

• Years: 2026 - 1995 = 31... but Oct hasn't come yet.
• Months: Oct→Mar = 5 months
• Days: 5th→17th = 12 days
• Exact age: 30 years, 5 months, 12 days

Complication: If born Jan 31, "one month later" is... Feb 28? Mar 1? Date libraries handle these ambiguities.

Korean age: Born with 1 year, add 1 every Jan 1st. Born Dec 31 = 2 years old next day. South Korea officially abolished this in 2023.

Chinese: Similar. Traditional counting from conception (9 months before birth).

Hebrew calendar: Lunar. Jewish birthdays fall on different Gregorian dates each year.

Islamic calendar: 354-355 days/year. 30 Islamic years ≈ 29 Gregorian years.

To calculate days until you reach a legal age, the date calculator gives the exact result.

Birthday paradox: In a group of 23 people, >50% chance two share a birthday. With 70 people, >99.9%. Verify with the percentage calculator.

Age on other planets: On Mars (687 days/year), a 30-year-old Earthling is ~16 in Martian years.

Most common birthday: September 9 (9 months after New Year's). Least common: February 29.

Born Feb 29: Celebrate every 4 years. Most countries legally consider the birthday March 1 in non-leap years.

Excel: =DATEDIF(A1, TODAY(), "Y") & " years, " & DATEDIF(A1, TODAY(), "YM") & " months"

JavaScript:

const birth = new Date(1995, 9, 5);
const today = new Date();
let age = today.getFullYear() - birth.getFullYear();
if (today < new Date(today.getFullYear(), birth.getMonth(), birth.getDate())) age--;
console.log(age); // 30

Python:

from datetime import date
birth = date(1995, 10, 5)
age = date.today().year - birth.year - ((date.today().month, date.today().day) < (birth.month, birth.day))

Born Oct 5, 1995, as of Mar 17, 2026:

• Days lived: 11,120
• Hours: 266,880
• Minutes: 16,012,800
• Heartbeats: ~1,112,000,000 (100K/day average)
• Breaths: ~266,880,000 (24K/day)
• Full moons: ~377

Popular for birthday social media posts. Calculate your exact numbers with the NexTools age calculator.