When should I move my baby from bassinet to crib? The signs, the timing, and how to know it's time.

If you keep glancing at the bassinet wondering whether your baby has outgrown it, you are asking exactly the right question at exactly the right time. Knowing when to move your baby from bassinet to crib is less about a number on the calendar and more about a handful of signs that quietly add up. Most of the time, the bassinet tells you before the baby does.

Here is how to read those signs, and how to know the moment has actually arrived.

Here is what is actually going on

A bassinet is built for the newborn weeks. It is small, snug, and close to your bed, which is exactly what a brand new baby needs. But babies grow fast, and bassinets have firm limits. Every bassinet comes with a maximum weight, usually somewhere between 15 and 20 pounds, and a maximum height. It also has a rule about movement: once your baby can push up, roll, or sit, the low sides that felt cozy become something she can lever herself against.

So the transition is really about two clocks running at once. One is her size. The other is her strength. Whichever runs out first is the one that decides the timing, and it is almost always sooner than the calendar would suggest.

When this usually shows up

Most babies make the move somewhere between 4 and 6 months. Some are ready at 3 months because they are long or strong early. Others stay comfortable a little past 4 months. There is no prize for waiting and no penalty for going early.

What most pediatricians will tell you is that safe sleep matters more than the size of the bed. The crib can absolutely stay in your room. Keeping your baby close while she sleeps in her own crib gives you the best of both, the safety of room-sharing and the space her growing body needs. If you are weighing the two beds in general, this comparison of a bassinet versus a crib for newborn sleep walks through it gently.

How to tell this is what is happening

It is time to move your baby to a crib if any one of these is true:

• She has reached the bassinet's stated weight limit, usually 15 to 20 pounds
• She has reached the bassinet's height limit, or simply looks cramped end to end
• She can roll from back to front, or front to back
• She can push up onto her hands and knees, or is starting to sit
• She is bumping the sides, scooting to the edges, or seems to have more room to move than the bassinet allows

You only need one of these to be true. You do not wait for all of them. The first sign that shows up is your green light.

Things that actually help

Start with naps, not bedtime

The crib is a big new space, and the easiest way in is daytime. Begin with one or two naps a day in the crib while keeping nighttime in the bassinet for a few days. Once naps feel ordinary, move bedtime over too. A slow handover is gentler on both of you than an overnight switch.

Keep the crib in your room at first

If your room has space, roll the crib in next to your bed. She gets the larger, safer sleep surface, and you keep her close. Moving her to a crib and moving her to her own room are two separate steps, and there is no rule that says they have to happen on the same night.

Keep the sleep space bare

A safe crib is a boring crib. Firm mattress, fitted sheet, nothing else. No bumpers, no pillows, no loose blankets, no stuffed animals. If she still likes to feel snug, a sleep sack is the safe way to give her that. This guide to what belongs in a crib and what to leave out covers it in full.

Keep the rest of the routine identical

Same bath, same song, same dim light, same sound. When the bed changes, keep everything around it the same so her body still recognises the cue. Familiarity does the heavy lifting here. For the step-by-step of the switch itself, here is how to actually make the bassinet to crib move.

Tonight could be the night it clicks

Willo has 12 sleep sounds built for little ones, a bedtime routine that tracks itself, and a sleep plan matched to your baby's current phase. When nothing's working at 2am, you'll be glad it's on your phone.

Get Willo App

Things that tend not to help

• Waiting until she has clearly outgrown the bassinet. Once she can roll or push up, the bassinet is no longer the safe choice, even if she still fits.
• Making the move on a hard night. Pick a stretch of ordinary days, not the middle of a regression or a cold.
• Switching the bed and the room on the same night. That is two changes at once. Spread them out.
• Assuming she will sleep worse in a crib. Most babies settle within a few nights, and many sleep better with the extra room.

When to stop reading articles and call your pediatrician

This is a normal, everyday transition that rarely needs medical input. Reach out to your pediatrician or family doctor if:

• Your baby can roll or push up but you are unsure her current sleep space is still safe
• She was sleeping well and has suddenly stopped, with no clear reason
• She seems to be in pain when laid flat, or arches and cries every time
• She has any breathing pattern that worries you during sleep
• You have questions about safe sleep that you want answered by someone who knows her history

Trust your gut. If something feels off, a quick call is always worth it.

How Willo App makes this easier

Inside the Willo App, the bassinet to crib moment lines up with where your baby sits across her 35 developmental phases, so you can see the readiness signs coming instead of second-guessing them in the dark. You will find a phase-matched bedtime routine, sleep sounds that move with her to the new bed, and Ask Willo for the 2am question that feels too small to text anyone.

The move to a crib is one of those quiet milestones that feels enormous in the moment and obvious in hindsight. You will know when it is time. And when you do, you will handle it just fine.