The best way to know how much a scoop of your feed holds is to weigh it! You can buy a spring balance or use kitchen scales. Put a scoop of your feed into a plastic bag and place it on the spring balance or the scales and weigh it accurately. As a rule, a scoop of cubes will weigh more than a similar scoop of mix.
On average a round Stubbs scoop of cubes will weigh approximately 2.0kg whereas a scoop of mix will weigh approximately 1.5kg. These weights are only guidelines and will vary with the type of feed and whether you provide a level or heaped scoop. Weighing your scoop of feed is advisable in order to follow the manufacturer’s feeding guidelines correctly.