A method for measuring hemolysis in whole blood or determining a correction factor for correcting the influence of hemolysis on a hematocrit measurement using the following method steps: Irradiating the whole blood with a radiation that is directed on the whole blood, Detecting an emerging radiation with regard to the incoming radiation from a first direction for taking a first measurement according to a first measuring method, and Detecting an emerging radiation with regard to the incoming radiation from a second direction for taking a second measurement according to a second measuring method, Determining a first hematocrit value based on the intensity of the radiation emerging from the first direction according to the first measuring method, Determining a second value for the hematocrit based on the intensity of the radiation emerging from the second direction according to the second measurement, characterized in that the hemolysis or the correction factor for correcting the influence of the hemolysis on the hematocrit measurement is established on the basis of the value for hematocrit that was determined according to the first and second measuring methods, the hemolysis or the correction factor for correcting the influence of the hemolysis on the hematocrit measurement is determined on the basis of the difference of the hematocrit values determined according to the first and second measuring methods, the radiation emerging from the first direction being the scattered radiation that was scattered in the whole blood and the radiation emerging from the second direction being the transmitted radiation that passes through the whole blood and that is directed in the same direction as the radiation that is directed onto the whole blood. Irradiating the whole blood with a radiation that is directed on the whole blood, Detecting an emerging radiation with regard to the incoming radiation from a first direction for taking a first measurement according to a first measuring method, and Detecting an emerging radiation with regard to the incoming radiation from a second direction for taking a second measurement according to a second measuring method, Determining a first hematocrit value based on the intensity of the radiation emerging from the first direction according to the first measuring method, Determining a second value for the hematocrit based on the intensity of the radiation emerging from the second direction according to the second measurement, characterized in that the hemolysis or the correction factor for correcting the influence of the hemolysis on the hematocrit measurement is established on the basis of the value for hematocrit that was determined according to the first and second measuring methods, the hemolysis or the correction factor for correcting the influence of the hemolysis on the hematocrit measurement is determined on the basis of the difference of the hematocrit values determined according to the first and second measuring methods, the radiation emerging from the first direction being the scattered radiation that was scattered in the whole blood and the radiation emerging from the second direction being the transmitted radiation that passes through the whole blood and that is directed in the same direction as the radiation that is directed onto the whole blood.