Pneumatic distribution machine, comprising: - at least one storage hopper for receiving goods to be distributed, having at least one outlet opening; - at least one metering member which is disposed downstream of the outlet opening of the storage hopper, having at least one metering wheel having a plurality of metering cells; - a control and/or regulating device which is connected to the metering member and is configured to control and/or regulate the rotating speed of the metering wheel to a target mass flow of goods to be distributed as a function of at least one parameter from the group of target distribution amount per unit area, travel speed, and working width; - at least one transfer chamber disposed downstream of the metering member, for transferring goods to be distributed which have been metered by means of the metering member into at least one conveying line; - at least one fan for impinging the conveying line with an airstream; - at least one distribution member which is disposed downstream of the conveying line; and - at least one weighing installation having a weighing chamber to which a specimen of a specific type of goods to be distributed is able to be supplied for calibrating the metering member, so as to gravimetrically determine the mass of the specimen of goods to be distributed which has been transferred into the weighing chamber, wherein the weighing chamber of the weighing installation, which is disposed upstream of the metering member, is equipped with at least one sensor for detecting the volume of the specimen of goods to be distributed which has been supplied to said weighing chamber; that the control and/or regulating device is configured to determine the specific weight of the goods to be distributed from the volume of the specimen of goods to be distributed determined by sensor in the weighing chamber on the one hand, and from the mass of the specimen of goods to be distributed which has been transferred into the weighing chamber and gravimetrically determined by means of the weighing installation on the other hand; and that at least one value representative of the storage volume and of the number of metering cells of the metering wheel is stored in the control and/or regulating device, wherein the control and/or regulating device, by way of the mass of goods to be distributed per metering cell or per group of metering cells of the metering wheel determined from the specific weight of the goods to be distributed determined in such a manner, is configured to control and/or regulate the rotating speed of the metering wheel of the metering member to the target mass flow of goods to be distributed. - at least one storage hopper for receiving goods to be distributed, having at least one outlet opening; - at least one metering member which is disposed downstream of the outlet opening of the storage hopper, having at least one metering wheel having a plurality of metering cells; - a control and/or regulating device which is connected to the metering member and is configured to control and/or regulate the rotating speed of the metering wheel to a target mass flow of goods to be distributed as a function of at least one parameter from the group of target distribution amount per unit area, travel speed, and working width; - at least one transfer chamber disposed downstream of the metering member, for transferring goods to be distributed which have been metered by means of the metering member into at least one conveying line; - at least one fan for impinging the conveying line with an airstream; - at least one distribution member which is disposed downstream of the conveying line; and - at least one weighing installation having a weighing chamber to which a specimen of a specific type of goods to be distributed is able to be supplied for calibrating the metering member, so as to gravimetrically determine the mass of the specimen of goods to be distributed which has been transferred into the weighing chamber,