Hi Rob, we measure a cup of water or sourdough starter as weighing 227g, so you are correct that the water and starter amount will be 1/2 cup. However, our Unbleached All-Purpose flour weighs 120g per cup, so a "scant" cup is 113g. A regular maintenance feeding should look like this 1/2 cup (113g) starter + 1/2 cup (113g) water + 1 scant cup (113g) flour. This feeding routine is 1:1:1 (starter:water:flour, by weight). If you prefer to measure by ounces, remember that this is a weight measurement, not a volume measurement, so the weight of each component in your feeding should be 4 ounces, or 113g. 

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