First, check the bottom of the pot. Most manufacturers stamp the quart size right there, like a secret message from your appliance. If it says “6 QT,” congratulations—you’ve got 192 ounces of potential.
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No stamp? Look at the side of the crock or the underside of the lid. Still nothing? You can measure it yourself: fill the stoneware container with water, cup by cup (8 ounces per cup), and keep track. It’s a bit like a science experiment, but with fewer explosions. Usually.