Slow Cooker Time Conversion: Low vs. High and Converting Oven Recipes
October 29, 2026
A slow cooker cooks at a gentle temperature over many hours. Both the low and high settings eventually reach the same simmering temperature (about 209°F); the high setting simply gets there faster. As a rule of thumb, 1 hour on high equals about 2 hours on low. A recipe that says 8 hours on low can be done in 4 hours on high, and one that says 6 hours on high can be done in 10 to 12 hours on low (a recipe over 10 hours on low risks overcooking some foods).
To convert a conventional recipe to a slow cooker, use the guideline that time on low is about 8 to 12 times the oven or stovetop time, and time on high is about 4 to 6 times.
Skip the math and get your answer instantly:
Open the Time Calculator →Conversion Chart
Oven or stovetop 15 to 30 minutes: 4 to 6 hours on low or 1½ to 2½ hours on high. 30 to 45 minutes: 6 to 8 hours on low or 3 to 4 hours on high. 50 minutes to 3 hours: 8 to 10 hours on low or 4 to 6 hours on high. These are guidelines; always cook until the food reaches a safe internal temperature (165°F for poultry, 160°F for ground meats, 145°F plus rest for whole cuts of pork and beef). Tough cuts such as chuck roast, pork shoulder, and brisket benefit from the long cooking, as the collagen turns into gelatin.
| Conventional time | Slow cooker, low | Slow cooker, high |
|---|---|---|
| 15-30 minutes | 4-6 hours | 1.5-2.5 hours |
| 30-45 minutes | 6-8 hours | 3-4 hours |
| 50 minutes - 3 hours | 8-10 hours | 4-6 hours |
| Recipe says 8 h low | 8 hours | About 4 hours |
Liquid and Quantity
A slow cooker traps moisture, so reduce liquid by about one-third to one-half compared to a stovetop recipe, since there's little evaporation. Fill the cooker between half and three-quarters full for even cooking and safety; an underfilled cooker cooks faster, and an overfilled one slowly. Add dairy, fresh herbs, and delicate vegetables near the end (the last 30 to 60 minutes) to avoid curdling or mushiness. Thicken sauces at the end by uncovering on high for 30 minutes or by adding a cornstarch slurry.
Food Safety
Do not use the slow cooker to reheat leftovers, as it may take too long to reach safe temperatures. Thaw meat in the refrigerator before cooking. Don't lift the lid often: each peek adds 15 to 20 minutes of cooking time. If power goes out for a long time with food partially cooked, discard it unless you finish cooking it by another method. Keep cooked food above 140°F, and refrigerate leftovers within two hours.
Examples
A beef stew that takes 2 hours on the stovetop becomes 8 to 10 hours on low or 4 to 6 on high. A chili that simmers for 45 minutes becomes 6 to 8 hours on low. A pot roast of 3 pounds takes about 8 to 10 hours on low or 5 to 6 on high. Slow cookers vary in wattage and heat, so learn how yours behaves.
Frequently Asked Questions
How does low compare with high?
About 2 hours on low equals 1 hour on high.
How long is a 45-minute oven recipe in a slow cooker?
About 6 to 8 hours on low or 3 to 4 on high.
Should I reduce liquid?
Yes, by about a third to a half.
Can I reheat leftovers in a slow cooker?
It's not recommended.
How full should the cooker be?
Between half and three-quarters.