Method for determining the stamping quality of profiled bar material, in particular of steel concrete-reinforcing bars, which is advanced in a rolling train, with the following steps: a) upstream of the rolling stand performing the shaping, the initial speed V A of the starting product provided with a stamping by shaping is determined and, if not yet known, the initial diameter D A and/or the initial cross-sectional area F A are determined contactlessly, b) after the rolling stand performing the shaping, the final speed V E of the end product is measured and the diameter D E and/or the cross-sectional area F E of a virtual enveloping shell for the end product is/are determined contactlessly, c) of the end product, the diameter D N of a virtual, round end product is determined contactlessly as D N = square root of D A 2 × V A / V E and/or the average cross-sectional area F NE of the end product is determined contactlessly as F NE = F A × V A / V E, d1) the characteristic stamping variable PKG is calculated on the basis of D E and D N and/or on the basis of F E and F NE, or d2) the values determined and calculated in steps a), b) and c) are used for calculating variables derived from them, if said derived variables are not yet known, the derived variables being: i) the initial volume and/or the initial weight per unit of length of the starting product, ii) the volume and/or the weight of the virtual enveloping shell per unit of length and iii) the volume of the end product per unit of length and/or the weight of this volume of the end product, and e) the characteristic stamping variable PKG calculated according to step d1) or d2) is compared with a pre-set setpoint value PKG set. a) upstream of the rolling stand performing the shaping, the initial speed V A of the starting product provided with a stamping by shaping is determined and, if not yet known, the initial diameter D A and/or the initial cross-sectional area F A are determined contactlessly, b) after the rolling stand performing the shaping, the final speed V E of the end product is measured and the diameter D E and/or the cross-sectional area F E of a virtual enveloping shell for the end product is/are determined contactlessly, c) of the end product, the diameter D N of a virtual, round end product is determined contactlessly as D N = square root of D A 2 × V A / V E and/or the average cross-sectional area F NE of the end product is determined contactlessly as F NE = F A × V A / V E, d1) the characteristic stamping variable PKG is calculated on the basis of D E and D N and/or on the basis of F E and F NE, or d2) the values determined and calculated in steps a), b) and c) are used for calculating variables derived from them, if said derived variables are not yet known, the derived variables being: i) the initial volume and/or the initial weight per unit of length of the starting product, ii) the volume and/or the weight of the virtual enveloping shell per unit of length and iii) the volume of the end product per unit of length and/or the weight of this volume of the end product, and i) the initial volume and/or the initial weight per unit of length of the starting product, ii) the volume and/or the weight of the virtual enveloping shell per unit of length and iii) the volume of the end product per unit of length and/or the weight of this volume of the end product, and e) the characteristic stamping variable PKG calculated according to step d1) or d2) is compared with a pre-set setpoint value PKG set.