You are 21 years old if you were born on March 16, 2003.
You are 21 years 1 month, 1 week, and 1 day old or 253 months old or 1,101 weeks old or 7,710 days old or 185,040 hours old or 11,102,400 minutes old or 666,144,000 seconds old You were born on a Sunday.