A recipe that is cooked on the low setting in your slow cooker will take about a quarter as long in a Dutch oven in a 325-degree oven (if it cooks for 8 hours on low, it will take two to three hours in the Dutch oven). A recipe that is cooked on high setting will take about half as long. But remember, that's only an estimate, so leave yourself a little extra time.
| Slow Cooker | Dutch Oven |
| 12 hours/Low | 3 hours/325° F |
| 10 hours/Low | 2 1/2 hours/325° F |
| 8 hours/Low | 2 hours/325° F |
| 6 hours/Low | 1 1/2 hours/325° F |
| 5 hours/Low | 1 hour, 15 min./325° F |
| 4 hours/Low | 1 hour/325° F |
| 4 hours/High | 2 hours/325° F |
| 3 hours/Low | 45 min./325° F |
| 3 hours/High | 1 1/2 hours/325° F |
| 2 hours/Low | 30 min./325° F |
| 2 hours/High | 1 hour/325° F |
| 1 hour/Low | 15 min./325° F |
| 1 hour/High | 30 min./325° F |
http://www.cookingincastiron.com/files/20080123_slowcooker_to_dutchoven.html