You are 21 years old if you were born on March 15, 2003.
You are 21 years 1 month, 1 week, and 4 days old or 253 months old or 1,101 weeks old or 7,713 days old or 185,112 hours old or 11,106,720 minutes old or 666,403,200 seconds old You were born on a Saturday.