Your exact age is calculated by finding the difference between the current date and your date of birth. Our algorithm accounts for leap years, varying days in different months, and precise date math to give you the exact years, months, and days.

The biological facts, such as heartbeats and breaths, are estimates based on global human averages (e.g., an average resting heart rate of 72 beats per minute). These are fun metrics meant for entertainment rather than precise medical tracking.

Different planets take varying amounts of time to orbit the sun. For instance, Mercury completes an orbit in just 88 Earth days, meaning your "Mercury Age" is significantly higher. We use the orbital period of each celestial body relative to Earth to calculate these fun figures.