=IF(MONTH(NOW())<MONTH(G4),INT(YEAR(NOW())-YEAR(G4))-1,IF(MONTH(NOW())>MONTH(G4),YEAR(NOW())-YEAR(G4),IF(DAY(NOW())>=DAY(G4),YEAR(NOW())-YEAR(G4),YEAR(NOW())-YEAR(G4)-1)))

此公式用于根据出生的年、月、日精确的计算年龄，G4单元格填写的是出生日期