Bassinet or cradle: how long can your baby sleep in one?

A baby can sleep in a bassinet from birth to around 4–6 months (or up to 9 kg, depending on the manufacturer), while a cradle remains suitable a little longer, generally until 6 months. After that, a crib takes over, often from 6 months until age 2 or 3. These age guidelines are no substitute for observing your child: their mobility remains the most reliable sign that it’s time to change sleep spaces.

Bassinet and cradle: two different sleep spaces with different age limits

The bassinet is a lightweight basket with two handles that you can carry from room to room—ideal for keeping your baby close during naps or awake time. 

The cradle, by contrast, is more like a small bed: it is sturdier, sometimes has wheels, and is more often kept in the bedroom.

This difference in design explains why their age limits differ. A bassinet, with its more compact size, is suitable only for the first few months. A cradle is wider and deeper, so your baby can use it a little longer before moving to a crib. Comparing the “bassinet age limit” with the “cradle age limit” without distinguishing between the two doesn’t make much sense: each serves a different purpose in your baby’s room.

Until what age and weight can a baby sleep in a bassinet?

A baby can sleep in a bassinet from birth until about 4 to 6 months, or until they reach a maximum weight generally set at around 9 kg, depending on the manufacturer. A baby who grows quickly may reach that limit well before 6 months, while a smaller baby may be able to use the bassinet a little longer.

Beyond age and weight, your baby’s mobility is the main factor in deciding when to make the switch:

• Rolling over: once your baby rolls over on their own, the sides of the bassinet, often 15 to 25 cm high, are no longer high enough to keep them safely inside.
• Not enough space: if your baby’s head and feet already touch both ends of the sleep space, they no longer have enough room to move freely while sleeping.
• Reaching the weight limit: the frame and handles may start to weaken as your baby approaches the maximum weight.

At Charlie Crane, the KUKO bassinet can be used from birth to around 6 months and converts into a cradle with a wooden stand. This gentle progression supports each stage of your baby's growth without rushing them. To compare the available models, explore this selection of baby cradles and bassinets.

How long is a cradle suitable for your baby?

While a bassinet may become too small by 4 months, a cradle can generally accommodate a baby until around 6 months. The difference comes down to size: wider and deeper than a bassinet, it gives your baby more room to move without becoming unsafe as soon as they first try to roll over.

As with a bassinet, the real guide isn’t just the age listed in the instructions but your baby’s mobility. Once your baby pushes up on their arms or their head and feet touch the ends of the cradle, the space is too small for safe sleep: it’s time to prepare for the move to a crib.

Some cradles, particularly bedside sleeper models attached to the parents' bed, extend this period by making nighttime breastfeeding or bottle-feeding easier during the first few months. Whatever model you choose, it's best to opt for a healthy, durable solid wood cradle and check that the mattress provides firm support—essential for peaceful sleep until your child moves to a bed.

Signs your baby has outgrown their sleep space

Three physical signs deserve your attention, whatever sleep space your baby uses, more than any fixed age guideline:

• Rolling over: as soon as your baby can roll over on their own, from back to tummy or vice versa, the low sides of the bassinet or cradle are no longer enough to keep them inside. The risk of tipping becomes real, especially if the sleep space is on an elevated stand.
• Push-ups: when your baby pushes up on their hands or feet to lift themselves or try to sit, the confined space no longer meets their need to move.
• Baby's body touches the ends: when your baby's head and feet touch opposite ends of the sleeping space, there's no room left to move freely. That can disrupt their sleep—and yours, too!

Every child grows at their own pace. Watching for these signs helps you prepare calmly for the move to a crib, which is better suited to a more mobile baby.

Bassinet, cradle, crib: comparing age ranges and safety criteria

Sleep space	Age range
Bassinet	From birth to around 4–6 months
Cradle	from birth to about 6 months
Crib	From 6 months to 2 or 3 years
Convertible crib	Up to age 6 or 8

This comparison highlights a simple idea: each sleeping space has its own place in your baby's room at a particular stage, rather than replacing the others. The lightweight bassinet is ideal for the earliest months, the cradle extends that cozy feeling with greater stability, and the crib takes over once your child needs room to move. A convertible crib is designed to last, growing with your child over several years. To choose with confidence, always consider these age guidelines alongside your daily observations of your child: this chart is a guide, not a hard-and-fast rule. You know your baby best!

Why shouldn’t you use a bassinet beyond the recommended age?

Using a bassinet for too long is not just about exceeding an age guideline: above all, its stability and space may no longer suit your baby's mobility. A bassinet's sides are low by design, intended for a newborn who is not yet moving much. As soon as your baby begins to roll over independently, push up on their arms or press against the surface with their legs, those same sides become a weak point. There is a real risk of tipping if the bassinet is placed on an elevated surface, even on its stand.

The interior length presents the same problem: a baby who already touches both ends of the sleep space no longer has room to stretch out or move freely while sleeping. A bassinet is designed as a temporary cozy space, not a long-term bed. Its lightweight frame, handles and compact size make it easy to move around the home during the first few months; they aren’t intended for extended use as a growing child’s bed.

After this stage, it’s better to move to a cradle, then a crib. Both are designed to accommodate a bigger, more mobile baby, offering more space and a sturdier base. Watching your baby is the best guide: their mobility, more than their exact age, tells you when it’s time to change sleep spaces.

How do you transition from a bassinet or cradle to a crib?

The transition is something to prepare for, not improvise. Once your baby rolls over on their own, touches both ends of their sleep space, or approaches the manufacturer’s maximum weight limit, it’s time to plan a gentle change:

• Plan ahead without rushing: set up the crib in the room a few days before the big move so your baby can get used to seeing this new space, which is roomier than their bassinet or cradle.
• Keep things familiar: the same sleep sack, the same favorite comfort item and, if possible, a sheet that already smells like your baby can help bridge the gap between their old cozy space and their new bed.
• Check the safety of the crib, whether it has slats or not: slat spacing that meets the NF EN 716 standard (referenced by securidou.fr), a firm mattress that fits the sleeping space exactly, and a mattress base set to its highest position for the first few weeks to make everyday care easier.
• Take it step by step: a few naps in the crib before your baby spends the whole night there can help both baby and parents feel more at ease.
• Pay attention to your baby: age is only a guideline. What matters most is your baby’s comfort and safety in their new sleep space.

A crib with or without slats, made from healthy, durable solid wood, can then serve your baby for several years in a room designed to grow with them.

Frequently Asked Questions

Until what age can a baby sleep in a bassinet? Generally until 4–6 months, or up to 9 kg, depending on the manufacturer. The most reliable sign, however, is when your baby first rolls over.

How long can you use a cradle? A cradle is suitable until about 6 months, sometimes a little longer for certain bedside-sleeper models, thanks to its larger sleep space compared with a bassinet.

When should your baby move from a bassinet or cradle to a crib? At around 6 months, or sooner if your baby rolls over on their own, pushes up on their arms, or already touches the edges of their sleep space.

Can a baby sleep in a bassinet or cradle all night? Yes, provided it is placed on a flat, stable surface, with a firm mattress that fits exactly and nothing else in the sleep space.

Should you replace the mattress in a secondhand bassinet or cradle? It’s recommended that you always replace the mattress, even if it appears to be in good condition, because hidden moisture can encourage mold growth.