Hepatitis B surface antigen 0.03ng/ml is normal. Hepatitis B surface antigen <0.05ng/ml is normal. Hepatitis B surface antigen 0.03ng/ml, which is within the normal reference value, indicates that one is not infected by the hepatitis B virus and is a normal test result. However, if hepatitis B surface antibody is also negative or weakly positive, it is necessary to take hepatitis B vaccination immediately to promote the production of hepatitis B protective antibody. If the hepatitis B surface antigen test result is greater than normal and positive, further tests should be done, including liver function tests, liver and gallbladder ultrasound and other tests. Hepatitis B surface antigen 0.03ng/ml belongs to normal people, usually pay attention to protect the liver, if there are symptoms of pain in the upper right abdomen and jaundice, it is recommended to actively consult a doctor.