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Slow Cooker, Pressure Cooker or Air Fryer: Which Suits Your Week?

Three countertop cookers, three very different jobs. Answer three questions about how you actually cook and the right one becomes obvious.

By Eleanor Hale

A slow cooker, pressure cooker and air fryer side by side on a kitchen worktop

Our pick

Instant Pot Duo 5.7L multi-cooker

Why we picked it

  • Pressure cooks and slow cooks in one pot
  • 5.7 litres feeds a family or a batch for the freezer
  • Sauté function means browning without another pan

Worth knowing

  • Pressure cooking has a learning curve and a release step
  • It’s bulky on a small worktop

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Sunday’s shopping is in the fridge, Thursday will be chaos as usual, and you’re wondering which gadget would actually make the week easier. The honest answer depends less on the gadget and more on how you cook.

Three questions first

  1. When do you have time? In the morning, or only at 6pm when everyone’s hungry?
  2. What do you cook most? Stews, curries and pulled meat, or chips, chicken and crispy things?
  3. How many are you feeding? Two, four, or a freezer full of portions?

What each one is actually for

Slow cookerPressure cookerAir fryer
Best atStews, curries, tough cutsStews and beans in a fraction of the timeCrispy food, reheating, small portions
Time6 to 8 hours, unattendedUnder an hour for most stews15 to 30 minutes
SuitsPeople who prep in the morningThe 6pm scrambleSmall households, quick meals
TextureSoft and tenderSoft and tenderCrisp and browned
Diagram: which countertop cooker suits your week, by time available and what you cook

What each one does badly

  • Slow cooker: anything you want crisp. Dairy, fresh herbs and pasta also suffer if they go in at the start, so add them in the last half hour.
  • Pressure cooker: delicate fish and green vegetables overcook in seconds, and you can’t taste and adjust halfway through without releasing the pressure.
  • Air fryer: wet batters drip through the basket, and big batches have to be cooked in rounds.

Sizing it to your household

HouseholdSlow cookerPressure or multi-cooker
One or twoAbout 3.5L3L to 5.7L
Three or four3.5L to 5L5.7L
Batch cooking for the freezer6L or more6L or more

Remember that a slow cooker works best between half and two-thirds full, and a pressure cooker must never be filled past its maximum line. Buying slightly bigger than you think gives you room for a batch.

A note on batch cooking

If you cook once and eat three times, the big pot matters more than the method. Cool food quickly, portion it into freezer bags and label them. Reheat thoroughly until piping hot all the way through.

Running costs

All three use far less energy than heating a full oven for a small meal. A slow cooker runs at low power for a long time, a pressure cooker at higher power for much less time. The Energy Saving Trust compares cooking appliances and finds the small ones generally cheaper than the oven for the same meal. For the air fryer maths, see when an air fryer actually beats the oven.

Matching the cooker to the household

A slow cooker of beef stew on a kitchen worktop with bowls ready

The morning prepper

If you can spend ten minutes before work, a slow cooker is the calmest option. It’s cheap, simple, and dinner is ready when you walk in.

Slow cooker

Crock-Pot digital slow cooker (3.5L)

Best for: three or four portions with a countdown timer that switches to keep-warm.

Think twice if: you batch cook for the freezer; go bigger.

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The 6pm scramble

If you only start thinking about dinner when you get home, a pressure cooker turns a three-hour stew into a weeknight meal. A multi-cooker like our pick does slow cooking too, so you don’t need both.

Want crispy as well as stews?

All-in-one

Ninja Foodi MAX multi-cooker (7.5L)

Best for: pressure cooking and air frying in one appliance, with a lid for each job.

Think twice if: worktop space is tight. It’s large and heavy.

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If you mostly want crispy food for one or two, a dedicated air fryer is simpler and cheaper than an all-in-one. Our air fryer guide covers sizing.

Leaning towards an air fryer? Compare layouts in single basket or dual drawer. Batch cooking for the freezer? Read freezing food properly.

Quick answers

Can a pressure cooker replace a slow cooker?

Many multi-cookers have a slow-cook setting, so one appliance can cover both. Dedicated slow cookers are cheaper and simpler if that’s all you need.

Is it safe to leave a slow cooker on while I'm out?

They’re designed to run unattended. Follow the manual, keep it clear of anything that could catch, and don’t overfill it.

Eleanor Hale

Eleanor Hale is the pen name of the Home Lifes editorial team. We research how kitchen kit works, read the manufacturers’ specs and independent tests, and tell you plainly what we’d buy and what we’d skip. How we work.