Rheumatoid factor normal value quantitative test is usually 0 to 20IU/ml, different hospitals normal value varies. 1. The normal value of rheumatoid factor quantitative testing is in the range of 0~20IU/ml, some hospital laboratory tests normal value is below 30IU/mL or below 15IU/mL. 2. It is generally necessary to determine the normal range value of rheumatoid factor according to the normal reference value behind the test results. 3. The more the rheumatoid factor exceeds the normal maximum limit, the greater the likelihood of rheumatoid arthritis. In addition to this, other autoimmune diseases, infectious diseases and tumor diseases can lead to a positive rheumatoid factor. If the rheumatoid factor is abnormal, it is recommended to go to the hospital in time for regular treatment.