Is a Pressure Cooker the Same as a Slow Cooker? Key Differences Explained
No. A pressure cooker and a slow cooker are opposites. A pressure cooker seals in steam to cook hotter and faster: Presto says it reaches 250°F at 15 pounds of pressure. A slow cooker cooks gently over many hours at about 170 to 280°F, according to USDA FSIS.
Many electric multi-cookers, such as the Instant Pot, can do both, but they are still two different cooking methods.
- Pressure cookers trade time for heat: stew beef takes about 25 minutes instead of hours.
- Slow cookers trade heat for time: meals cook unattended for 4 to 10 hours.
- A pressure cooker locks shut and needs a careful pressure release. A slow cooker’s lid simply rests on top.
- You cannot use a regular slow cooker for pressure cooking.
- Multi-cookers combine both, but their slow cook setting may run differently from a classic crock.
Pressure cooker vs slow cooker at a glance
| Pressure cooker | Slow cooker | |
|---|---|---|
| How it cooks | Sealed steam under pressure | Low, steady heat with a loose lid |
| Temperature | About 250°F at 15 psi (Presto) | About 170 to 280°F (USDA FSIS) |
| Typical time | Minutes (stew beef about 25 min) | Hours (often 4 to 10) |
| Lid | Locks and seals | Rests on top |
| Liquid | Must have enough to make steam | Less needed; little evaporates |
| Hands-off? | Mostly; you release pressure at the end | Fully; set it and leave it |
| Best for | Fast stews, beans, rice, tough meats | All-day braises, chili, dips |
How a pressure cooker works
Presto explains that a pressure cooker is like a saucepan with a special locking cover. Air is pushed out, steam is sealed in, and pressure builds. At 15 pounds of pressure, the inside reaches about 250°F, well above water’s normal boiling point of 212°F.
That extra heat, plus moist steam, cooks food fast and tenderizes tough cuts. Instant Pot’s time table, for example, lists 25 minutes for beef stew meat. See how it works for beef and noodles or potatoes.
How a slow cooker works
A slow cooker heats a stoneware crock from the sides and bottom. USDA FSIS says slow cookers cook food at about 170 to 280°F over several hours, and the steam from the tightly covered pot helps destroy bacteria.
Because it never builds pressure, the lid just sits on top. FSIS advises keeping it on as much as possible, because lifting it lets heat escape and slows cooking.
Can you use a pressure cooker as a slow cooker?
Electric multi-cookers usually have a Slow Cook setting, so yes. Use the slow cook or glass lid if one is included, or set the valve to Vent so pressure cannot build.
Some cooks find a multi-cooker’s Low setting runs cooler than a classic slow cooker, so you may need the More or High setting. A stovetop pressure cooker cannot slow cook unattended, as it relies on your burner.
Can you use a slow cooker as a pressure cooker?
No. A slow cooker has no seal, locking lid or pressure valve. It will only ever cook at slow cooker temperatures, no matter how long you leave it.
Which should you buy?
- Choose a pressure cooker if you want dinner fast after work, cook dried beans, or make stock and stews in under an hour.
- Choose a slow cooker if you like to start dinner in the morning, make big batches of chili, or want the simplest controls.
- Choose a multi-cooker if you want both in one appliance and do not mind learning a few settings.
See our guides to the best mini electric cookers, the best 6-quart slow cookers and the Ninja Foodi pressure cooker.
Converting recipes between the two
| Slow cooker recipe | Pressure cooker approach |
|---|---|
| Beef stew, 8 hours on Low | About 25 minutes at high pressure |
| Liquid amount | Keep at least the minimum your cooker requires (often 1 cup) |
| Thickeners (flour, cornstarch) | Add after pressure cooking, so they do not scorch |
| Dairy (milk, cream, cheese) | Stir in at the end |
Frequently asked questions
Is a pressure cooker the same as a slow cooker?
No. A pressure cooker cooks fast at high temperature under pressure. A slow cooker cooks slowly at lower temperature without pressure.
Is an Instant Pot a pressure cooker or a slow cooker?
Both. The Instant Pot Duo, for example, lists pressure cook, slow cook, sauté, steam, rice, yogurt and keep warm among its functions.
Which is healthier?
Both use moist heat and little added fat. Pressure cooking is faster; slow cooking is gentler. The ingredients matter more than the method.
Which uses less energy?
It depends on the appliance and recipe. A pressure cooker runs for a much shorter time, while a slow cooker uses low power for many hours.
The bottom line
A pressure cooker and a slow cooker are not the same: one cooks hot and fast under pressure, the other low and slow without it. A multi-cooker can do both, but choose the method that fits your schedule.
- National Presto Industries, Pressure Cooker Instructions and Recipes.
- USDA Food Safety and Inspection Service, Slow Cookers and Food Safety.
- Instant Pot, Cooking Time Tables.
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