How much dry oatmeal equals 1/2 cup cooked?
                                
                                
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                                    5 min read                                
                            
                                A typical single serving of hot cereal like oatmeal is about 1/2 cup cooked. The amount of dry oatmeal needed to achieve 1/2 cup cooked, however, varies significantly depending on the type of oat and your desired consistency, but a reliable baseline can be determined with simple ratios.