Key takeaways
- A 200W slow cooker left on low for eight hours uses about 1.6kWh, roughly 42p at the 26.11p per kWh electricity rate in the July to September 2026 price cap.
- Good ones start at about £15 for a 1.8L pot and reach £96 for Ninja’s 8-in-1, which sears and goes in the oven.
- 3.5L feeds three or four people. Only go to 6L or larger if you actually portion and freeze.
- A hob-safe or oven-safe inner pot is the one feature worth paying extra for, because it saves you browning meat in a separate pan.
Slow cooker searches climb every year from late August, and this year there’s an extra push behind them. Ofgem publishes the October to December price cap by 26 August 2026, and the current cap already puts electricity at 26.11p per kWh. A slow cooker is one of the few appliances that genuinely cuts what you spend on cooking, because it draws a fraction of what an electric oven pulls and it turns cheap cuts into something worth eating. Here are six on Amazon UK that we’d actually put money on, from a £15 pot for one to a £96 machine that replaces three appliances.
How we picked these
We’re not a test kitchen, so we’re upfront about the method. We work from live Amazon UK listings, manufacturer specs, and the running-cost maths, then we cut anything that doesn’t earn its place. What we weighted:
- Running cost. Eight hours on low at 26.11p per kWh, the electricity unit rate under the Ofgem cap for July to September 2026. A 150W to 250W pot lands between about 31p and 52p. The same casserole in a 2kW electric oven for two hours is closer to £1.04.
- Capacity that matches real households. A 3.5L bowl covers most UK families. Buying 6.5L because it looks better value is how slow cookers end up in the loft.
- One pot or two. Ceramic bowls hold heat well but you brown meat in a frying pan first. Hob-safe aluminium and oven-safe pots skip that.
- Cleaning. Removable, dishwasher-safe bowl only. Fixed bowls are miserable.
- Ratings and price stability. Everything here sits at 4.6 stars or better on Amazon UK at the time of writing.
At a glance
| Slow cooker | Best for | Capacity | Around |
|---|---|---|---|
| Crock-Pot 1.8L | One or two people | 1.8L | £15 |
| Tower 3.5L | A tight budget | 3.5L | £23 |
| Morphy Richards Accents Sear & Stew | Browning in the same pot | 3.5L | £30 |
| Crock-Pot 6.5L | Batch cooking and freezing | 6.5L | £32 |
| Crock-Pot Digital 3.5L | Setting a timer and leaving | 3.5L | £35 |
| Ninja Foodi PossibleCooker | Replacing several appliances | 6L | £96 |
The six worth buying
Crock-Pot 1.8L Slow Cooker
Best for one or two peopleThe cheapest sensible way in. 1.8L is about two decent portions of curry or chilli, which suits a single household or a couple who don’t want to eat the same stew for five days. The ceramic bowl lifts out and goes in the dishwasher.
The catch: you can’t batch cook in it. A whole chicken won’t fit, and neither will a joint worth roasting, so it’s a supporting appliance rather than the main one.
1.8L removable ceramic bowl · 4.6 stars on Amazon UK · around £15
Check price on Amazon →Tower 3.5L Slow Cooker
Best on a tight budgetThree heat settings, a removable dishwasher-safe pot, and up to four portions for a bit over twenty quid. If you’ve never owned a slow cooker and you’re not sure you’ll use it, this is the one to find out with rather than spending £100 on a maybe.
The catch: it’s a dial and nothing else. No timer, no auto keep-warm, so someone has to be home to turn it off or dinner keeps cooking.
3.5L, up to 4 portions, 3 heat settings · 4.6 stars · around £23
Check price on Amazon →Morphy Richards Accents 3.5L Sear & Stew
Best for browning in the same potThe inner pot is non-stick aluminium and goes straight on the hob, so you brown your beef or soften your onions in it, then drop the whole thing back into the base. That’s one less pan and one less job, which is the difference between using a slow cooker on a Tuesday and not bothering.
The catch: aluminium doesn’t hold heat the way ceramic does, and the non-stick coating scratches if you get a metal spoon anywhere near it.
3.5L hob-safe aluminium pot, 3 heat settings · 4.7 stars · around £30
Check price on Amazon →Crock-Pot 6.5L Slow Cooker (SCV655B)
Best for batch cookingCrock-Pot rates this one for eight people or more, which in practice means a Sunday cook-up you portion into tubs and freeze. Fill it once and you’ve covered a week of lunches for the price of one bag of shin beef and a few onions.
The catch: it’s heavy. A 6.5L ceramic bowl full of stew is genuinely awkward to lift out, and the unit takes up a serious chunk of worktop or cupboard.
6.5L removable ceramic bowl, serves 8+ · 4.6 stars · around £32
Check price on Amazon →Crock-Pot Digital 3.5L Slow Cooker
Best for setting a timer and leavingYou set anything from 30 minutes to 20 hours and it drops to Auto Keep Warm when the time’s up. That’s what makes a slow cooker work around a shift pattern, because a nine-hour day doesn’t turn your casserole to paste. The bowl is oven-safe and dishwasher-safe.
The catch: the bowl is the same 3.5L as the £23 dial models, so you’re paying about £12 purely for the electronics. If you’re home in the afternoon, you don’t need them.
3.5L oven-safe bowl, 30 min to 20 hour timer, auto keep warm · 4.6 stars · around £35
Check price on Amazon →Ninja Foodi PossibleCooker 6L (MC1101UK)
Best for replacing several appliancesEight functions in one pot: sear and saute, slow cook, white and brown rice, pasta, braise, steam, keep warm. The pot is oven-safe to 240C, so you can brown a joint, slow cook it all afternoon, then finish a pastry lid under heat without washing anything else up. It handles a 1.8kg meat joint or 800g of rice.
The catch: it’s 42cm wide and weighs 5.5kg, so it lives on the worktop whether you like it or not. It also costs more than three basic 3.5L cookers put together, which only makes sense if you’ll use the other seven functions.
6L, 8 functions, oven-safe pot to 240C · 4.7 stars · around £96
Check price on Amazon →What size do you actually need?
Slow cookers work best between half and three quarters full, so the usable volume is smaller than the number on the box. As a rough guide: 1.5L to 2L for one or two people, 3.5L for three or four, 5L to 6.5L if you’re feeding five or more or you cook once and freeze the rest. Going too big is the more common mistake. A half-empty 6.5L pot cooks faster and drier than the recipe expects.
Questions people ask
Is it cheaper to use a slow cooker than an oven?
Usually yes, though not by as much as people assume. A 200W slow cooker on low for eight hours uses about 1.6kWh, which is roughly 42p at 26.11p per kWh. An electric oven pulling 2kW for two hours uses 4kWh, about £1.04. The saving is real but it’s pennies per meal, so the bigger win is that slow cooking makes cheap cuts like shin, brisket and shoulder worth buying.
Can you leave a slow cooker on all day when you’re out?
They’re designed for it, and that’s the whole point of the appliance. Sensible precautions still apply: put it on a heatproof surface with clearance around it, don’t run it under a wall cupboard, and don’t leave it plugged into an extension lead buried behind other appliances. A model with an auto keep-warm setting removes the worry about overcooking.
Do you have to brown the meat first?
You don’t have to, but browning adds a depth of flavour you can’t get any other way, and it renders off some fat that would otherwise sit on top of the sauce. If you know you’ll skip it on a weeknight, buy a sear-and-stew model with a hob-safe pot so the step takes one extra minute rather than an extra pan.
Can you put frozen meat straight in?
No. Defrost it fully in the fridge first. Frozen meat sits in the bacterial danger zone for too long as a slow cooker warms up. The Food Standards Agency’s general advice is that food should reach 70C for two minutes in the middle, and starting from frozen in a low-temperature appliance makes that hard to guarantee.
Ceramic or aluminium pot?
Ceramic holds heat more evenly and won’t scratch, which is why most traditional models use it. Aluminium is lighter, heats faster and can go on the hob for searing, at the cost of a non-stick coating that eventually wears. If you cook a lot of meat dishes, take the aluminium. If you mostly do soups and puddings, ceramic.
Sources
- Ofgem, Energy price cap
- Ofgem, Changes to the energy price cap between 1 July and 30 September 2026
- Food Standards Agency, Cooking your food
Prices checked on 20 August 2026 and change often. Look Into earns a commission from Amazon links at no extra cost to you.