What is the International Age Calculator?
Age is counted differently around the world. The international age calculator shows your exact age in the time zone you choose, your traditional Korean age (where you are 1 at birth and gain a year every 1 January), and your age in Hijri years, which are about 11 days shorter than solar years.
For fun, it also shows your age on other planets, based on how long each takes to orbit the Sun. For a standard age with days to your next birthday, use the Age Calculator; for today's Islamic date, see Islamic Date Today (Hijri Converter).
How to use the International Age Calculator
- Enter your date of birth.
- Choose the time zone you want to measure age in.
- Read your exact, Korean and Hijri age.
- Scroll to see your age on other planets.
Formula
Hijri age ≈ days lived ÷ 354.367 · Planet age = Earth age ÷ planet's orbital period in Earth years
Example
Someone born on 15 March 2000 is 26 in October 2026, 27 in traditional Korean age, about 27 Hijri years old, 13.8 years old on Mars and only 2.2 years on Jupiter.
Why is my Hijri age higher?
A Hijri (lunar) year has about 354 days, 11 fewer than a solar year. Every 33 solar years therefore contain roughly 34 lunar years, so your Islamic age grows slightly faster.
Korean age in 2023 and after
South Korea officially switched to "international age" for legal purposes in June 2023, but the traditional count is still widely used in daily life and is shown here for reference.
You may also need
People who use the International Age Calculator often need these related tools too:
- International Salary Calculator: Turn a salary in dollars, dirhams, riyals, pounds or euros into rupees (or any currency), with monthly, yearly, daily and hourly amounts.
- USD to PKR: Today's US dollar rate in Pakistani rupees with a live converter, swap button and a quick table for common amounts such as $100 and $1,000.
Frequently asked questions
What is Korean age?
A traditional East Asian count where you are 1 at birth and everyone gains a year on 1 January.
How do I calculate my age in Hijri years?
Divide the number of days you have lived by about 354.37.
Why does time zone matter for age?
Near midnight, you may already have had a birthday in one country but not in another.
How is my age on Mars calculated?
Mars takes 1.88 Earth years to orbit the Sun, so divide your Earth age by 1.88.
Is my date of birth stored?
No. Everything is calculated in your browser.
Is the International Age Calculator free to use?
Yes. The International Age Calculator on Custom Converter is completely free, with no sign-up, no daily limit and no watermark.
Does the International Age Calculator work on mobile phones?
Yes. It is built mobile-first and works on Android phones, iPhones, tablets and computers in any modern browser, with no app to install.