Procedure to compensate for a measuring error caused by a flow profile during flow measurement using an electromagnetic flowmeter with a measuring tube, said tube having a measuring tube axis, and a first and a second measuring electrode (4, 5), wherein said measuring electrodes are arranged diametrically opposed to one another on the measuring tube and wherein at said measuring electrodes a signal is measured to determine an uncompensated flow and/or a flow velocity, wherein the flowmeter has a coil arrangement, which is supplied with a current via an evaluation unit in such a way that a resulting magnetic field periodically changes its direction; wherein the first and the second measuring electrode (4, 5) define a first electrode axis, which has a point of intersection with the measuring tube axis and wherein the first electrode axis extends over a first cross-sectional plane, which is perpendicular to the measuring tube axis; wherein the flowmeter has a first, a second, a third and a fourth electrode (8a - 11a); wherein the first and second electrode (8a, 10a) are arranged in a diametrically opposite manner on the measuring tube and form a second electrode axis; wherein the third and fourth electrode (9a, 11a) are arranged in a diametrically opposite manner on the measuring tube and form a third electrode axis; wherein the second and third electrode axis (C, F) have a point of intersection with the measuring tube axis; wherein the second and third electrode axis (C, F) are located on a second cross-sectional plane; wherein both the second and the third electrode axis (C or F) cut the measuring tube axis; wherein the second cross-sectional plane is perpendicular to the measuring tube axis, wherein the second electrode axis is arranged on the second cross-sectional plane offset by an angular dimension in the clockwise direction of less than or equal to π/2 rad in relation to a parallel projection of the first electrode axis, wherein the third electrode axis is arranged on the second cross-sectional plane offset by an angular dimension in the counter-clockwise direction of less than or equal to π/2 rad in relation to a parallel projection of the first electrode axis, said procedure comprising the following steps: A Tapping of potentials at the four electrodes (8a-11a), wherein E 2 represents a potential at the second electrode, E 3 represents a potential at the fourth electrode, E4 represents a potential at the first electrode and E5 represents a potential at the third electrode; B Determination of multiple potential differences between the potentials of two adjacent electrodes in relation to the circumference of the measuring tube; C Weighting of the potential differences from step B and of a potential difference between the potentials E0 and E1 at the measuring electrodes (4, 5) with a empirical weighting factor, taking into consideration CALF nominal, CALF tb and U nom, wherein U nom is defined by a nominal sensitivity of the flowmeter or of the sensor, specified by the manufacturer under reference conditions, wherein CALF nominal is defined by the nominal sensitivity of the flowmeter divided by the actual sensitivity determined by the measured potential difference (E 0 - E1) at the first and the second measuring electrode (4, 5) under the reference conditions specified for the nominal sensitivity, wherein CALF tb is defined by the nominal sensitivity of the electromagnetic flowmeter divided by the actual sensitivity determined by the measured potential difference ( E3 - E4) or ( E5 - E2) under the reference conditions specified for the nominal sensitivity; D Determination of one or more calibration factors from the weighted potential differences; and E Compensation of the uncompensated flow and/or of the uncompensated flow velocity using one of more calibration factors. A Tapping of potentials at the four electrodes (8a-11a), wherein E 2 represents a potential at the second electrode, E 3 represents a potential at the fourth electrode, E4 represents a potential at the first electrode and E5 represents a potential at the third electrode; B Determination of multiple potential differences between the potentials of two adjacent electrodes in relation to the circumference of the measuring tube; C Weighting of the potential differences from step B and of a potential difference between the potentials E0 and E1 at the measuring electrodes (4, 5) with a empirical weighting factor, taking into consideration CALF nominal, CALF tb and U nom, wherein U nom is defined by a nominal sensitivity of the flowmeter or of the sensor, specified by the manufacturer under reference conditions, wherein CALF nominal is defined by the nominal sensitivity of the flowmeter divided by the actual sensitivity determined by the measured potential difference (E 0 - E1) at the first and the second measuring electrode (4, 5) under the reference conditions specified for the nominal sensitivity, wherein CALF tb is defined by the nominal sensitivity of the electromagnetic flowmeter divided by the actual sensitivity determined by the measured potential difference ( E3 - E4) or ( E5 - E2) under the reference conditions specified for the nominal sensitivity; D Determination of one or more calibration factors from the weighted potential differences; and E Compensation of the uncompensated flow and/or of the uncompensated flow velocity using one of more calibration factors.