Slow Cooker Conversion Chart: Low and High Both Hit 209 °F
October 8, 2026
You have a beef stew recipe that braises for two hours in the oven, and a workday that keeps you out for nine. The slow cooker is the obvious fix, so you look up a conversion chart. One says 8 to 16 hours on Low. Another says 6 to 8. Both look official, they disagree by a factor of two, and neither explains what “Low” actually means.
That last part is the key, and it’s not what most people assume.
The short answer
Match your recipe’s cooking time to a row, cut the liquid to about half, and start checking at the low end of the range. This is the time chart from Montana State University Extension’s slow cooker fact sheet:
| Recipe says | Cook on Low | Cook on High |
|---|---|---|
| 15–30 min | 4–6 hr | 1½–2 hr |
| 35–45 min | 6–10 hr | 3–4 hr |
| 50 min – 3 hr | 8–16 hr | 4–6 hr |
To switch a slow cooker recipe between settings, the same fact sheet’s rule is that one hour on High equals about two hours on Low.
That’s the same table behind our slow cooker converter. Enter your recipe’s time and it gives you both ranges, or flip it to Low ↔ High to move a recipe from one setting to the other.
Low and High are not two temperatures
Most people picture Low as a gentle oven and High as a hot one. Crock-Pot says otherwise. Its help center puts it in one line: “Both low and high stabilizes at 209°F” (98 °C). The difference is how long the pot takes to get there: 7–8 hours on Low, 3–4 hours on High.
So a slow cooker setting is really a heating speed. Both settings head for the same gentle simmer, just below boiling. High gets there in half the time, then holds it.
That explains the two-to-one rule better than any chart does. If Low needs about twice as long to reach the simmer point, a recipe tested at 8 hours on Low and one tested at 4 hours on High have both had roughly the same time to reach temperature and cook through. Our reading is that the rule describes the heat-up, so treat it as a starting point rather than a law. Crock-Pot’s figures are for its manual models. The USDA describes slow cookers in general as working “between 170 °F and 280 °F” (77–138 °C), as reproduced in Clemson Cooperative Extension’s slow cooker food safety fact sheet. That’s a far wider span than one brand’s spec, and your cooker may run hotter or cooler than either.
The takeaway: choose Low or High by your schedule, not by how hard you want the food cooked. Both end up in the same place.
Why the charts disagree
Here are two widely shared charts side by side: Montana State’s, and the one cookbook author Meredith Laurence publishes at Blue Jean Chef:
| Recipe says | Montana State: Low | Blue Jean Chef: Low | Montana State: High | Blue Jean Chef: High |
|---|---|---|---|---|
| 15–30 min | 4–6 hr | 4–6 hr | 1½–2 hr | 1½–2½ hr |
| 35–45 min | 6–10 hr | 5–7 hr (35–40 min) | 3–4 hr | 2–3 hr |
| 1–2 hr | 8–16 hr | 6–8 hr | 4–6 hr | 3–4 hr |
| 2–3 hr | 8–16 hr | 8–10 hr | 4–6 hr | 4–5 hr |
They agree at the short end and drift apart as recipes get longer. Montana State lumps everything from 50 minutes to 3 hours into one row with an eight-hour spread. Blue Jean Chef splits the same span into two narrower rows.
Neither is wrong, because of the 209 °F ceiling. Once a braise is at a gentle simmer, an extra hour or two doesn’t ruin it the way an extra hour in a 350 °F oven would. A tough cut just keeps getting more tender. Montana State’s wide band says this will be done somewhere in here, and you’ll be fine. Blue Jean Chef’s tighter rows say this is when it’s most likely ready. Use the narrow chart to know when to start checking, and the wide one to know how much slack you have.
The two also disagree on liquid. Montana State says to use about half the liquid in the original recipe, because nothing boils away under the lid. Blue Jean Chef says you “may be able to reduce the liquid slightly.” The difference is probably the recipe you start from. An uncovered stovetop simmer loses a lot of water, so it needs a bigger cut than a covered oven braise, which was already holding its steam. Start at half for stovetop recipes and closer to the original for covered braises. Soups are the exception: keep their liquid.
Worked example: the two-hour stew
The oven recipe: beef stew, 2 hours, 1 litre (about 4 US cups) of stock.
- Time: 2 hours falls in Montana State’s top row, so 8–16 hours on Low or 4–6 hours on High. The converter gives you the same ranges.
- When to check: Blue Jean Chef puts a 1–2 hour recipe at 6–8 hours on Low. Start checking at about 7–8 hours. If you’re out all day, the wide band says it will hold.
- Liquid: it was a covered oven braise, so cut the stock modestly, to about 700 ml (3 cups), not all the way to half.
- Done means done: cook the beef until it’s tender and has reached a safe internal temperature, checked with a food thermometer. The clock is only a guide.
The gotchas charts leave out
- Keep the lid on. Montana State notes it can take 20 minutes to win back the heat lost from one peek, and Clemson puts the drop at 10–15 °F each time the lid comes off.
- Fill it half to two-thirds full. Both extension sheets give this range, and the conversion times assume a pot filled that way.
- Thaw meat first. Frozen meat can sit too long between 40 and 140 °F (4–60 °C) as the pot slowly comes up to heat. If you can, start on High for the first hour and then switch to Low or the recipe’s setting, as Clemson’s sheet advises.
- Add dairy late, and pasta last. Montana State says to add milk, cheese and cream in the last hour. Pasta goes in at the end, or gets cooked separately, so it doesn’t turn to mush.
- Short recipes don’t convert well. Anything under about 15 minutes, such as a stir-fry or a seared steak, gains nothing from a slow cooker. The chart starts at 15 minutes for a reason.
- Use a thermometer, not the timer. Slow cookers vary by brand and age. Meat and poultry are done when they reach a safe internal temperature.
Going the other way
There’s no authoritative chart for turning slow cooker hours back into oven time. Reversing Montana State’s table doesn’t work either: 8 hours on Low sits in two of its rows. If you need dinner sooner, a pressure cooker is the better swap than the oven. Our Instant Pot converter turns a conventional time into pressure minutes, including the time to come up to pressure that most recipes leave out.
If the original recipe gives oven temperatures in a system you don’t use, the oven temperature converter sorts out °F, °C and gas marks. If you’re filling a bigger cooker than the recipe was written for, the recipe scaler will resize the ingredients. Then come back to the slow cooker converter for the time.