level 303Blood sugar 303 mgdl (16.81mmoll) - is that good or bad? We help you interpret your blood sugar values. You have tested your blood sugar and the result was 303 mgdl. ... To improveWhat does Ferritin level 303 mean? Your Ferritin level of 303 is a Normal Ferritin level. Normal Ferritin levels may indicate underlying health problems. The normal range is typically between