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How we test cot beds

By Lisa Galliers

Good looks aren't enough. We test each cot bed for safety and durability, and include expert assessments and parent testing to find the best.

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A cot bed isn't a cheap purchase, but get it right and yours could last for years. That's where we can help. 

Our extensive independent testing combines lab-based strength, safety and durability tests with an expert assessment of how easy each cot bed is to assemble and use. 

Our tests also include convenience ratings from parents to reveal exactly how simple it'll be to adjust the cot and convert it into a bed. 

Our reviews answer the most crucial questions about cot beds, including:

  • Is the cot bed safe and durable?
  • Is it easy to assemble?
  • Is it easy to use?
  • Is it easy to turn the cot into a bed?
  • Is there anything I should watch out for?
  • Should I buy it?

Find out which cot beds are the best buys by reading our cot bed reviews

Is the cot bed safe and durable? 

Which? cot bed reviews are based on tough safety, durability and construction tests according to the relevant British Standards.

  • Jumping toddler test To test the bed base, we pound it with a 10kg weight 1,000 times in the middle and at the end of  the bed to test how strong the base slats are. If the slats survive, we also pound them 1,500 times with a 20kg weight to simulate being jumped on by a bigger child.
  • Angry toddler test To simulate an angry toddler grabbing the top of the side-rail and shaking it violently, we shake the side rails of all cots up to 30 times per minute until each cot has been shaken 5,000 times.
  • Safety tests We run through a huge list of checks to ensure that each cot is well made and safe to use. We make sure it is the correct dimensions, as well as checking for potentially dangerous features and testing the durability of the components.
  • Checking for traps We stick probes that simulate children’s heads, fingers and limbs into all parts of the cot to check they won’t get trapped, helping to keep your baby safe and secure.

Best buy cot bedsfind out which cot beds passed our tests with flying colours.

Not a Which? member? Sign up for a £1 Which? trial to access these and thousands of our other independent reviews. 

Is the cot easy to put together? 

Getting the cot home is the easy part – putting it together is another matter. This is why we rate all the key aspects of assembling the cot, so you have less to worry about. 

  • Instructions We rate the quality of the instructions and how easy they are to follow in order to assemble each cot safely, checking that they accurately describe what you need to do.
  • Assembly Our cot bed reviews also tell you if we found an easier way to assemble the bed than the instructions describe.
  • Safety issues Incorrect assembly was one of the root causes of the problems leading to the recall of drop-side cot beds in the USA. So in our tests, three lab experts put each cot together. They rate how easy it is to do and note any possibilities for assembling the cot incorrectly, which could lead to safety issues.
  • Bolts and barrel nuts We found that the hardest part of assembling a cot bed is lining up the barrel nuts and bolts so you can screw the bed together. We also found that the bolts were generally poorer quality than those you could buy in a DIY store. 
  • Construction and workmanship We check for poorly constructed parts and assess how well the cot is constructed, before and after testing, as a cot and a bed – wobbly joints, bent bolts and flaky paint all come under our beady eyes.

There's no way of telling how good a cot bed will be just by admiring the stylish looks. Our Best Buys are all easy to assemble and pass our safety and durability tests. 

Is the cot bed easy to use?

We ask parent testers to rate different key aspects of each cot bed for ease of use:

  • Access – how easy it is to place a child into the cot and take them out with the base in various positions.
  • Drop side – how easy it is to lower and raise the drop side of the cot if it has one.
  • Adjusting the base position – how easy it is to change the height of the base and how much of the cot has to be disassembled to do it. 

Is it easy to turn the cot into a bed?

One of the key reasons for buying a cot bed is to turn it into a bed when your baby turns into a toddler. Our tests find out how easy this is to do. 

Our parent testers gets hands on with the cots and have a go at converting them into a children's bed. We get them to rate how easy it is to remove the sides, reposition the base and turn the cot into a bed. 

We'll tell you how many people you need to do this, and how sturdy the bed is, so you can have the best idea of what's to come.

We also check how loose the bolts and fittings are when swapping to a bed, and whether the fixings become too loose to be effective.

Is there anything else I should look out for? 

Our experts and parent testers work hard to uncover the negative points on all the cot beds we test, including: 

  • Will it last as long as it should? Our ergonomics experts check the size of the cots against the size of an average child
  • Features From teething rails to drop sides, are these features useful, and do they really do their job?
  • Getting your baby in and out Is this easy to do? We reveal whether a beer belly or a baby bump will get in the way

Should I buy it?

We analyse the data from our safety and durability tests, parent trials and expert assessments to give each cot bed a total test score. This means you can easily see the best and worst, and compare different models. 

The score we give each cot bed is made up of a combination of the elements of our tests, ignoring price, and broken down as follows: 

  • Ease of use – 30%
  • Build quality – 25%
  • Assembling the cot bed for the first time – 20%
  • Adjusting the base and turning into a junior bed  – 15%
  • Quality of the instructions – 10%

To become a Which? Best Buy, a cot bed must score at least 83% overall in our tests.

Find a cot bed that will last – head straight to our Best Buy cot beds.

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