The Short Answer
Most children transition from a crib to a toddler or single bed between 18 months and 3.5 years of age, with the average around 2.5–3 years. There is no single "right" age — the transition should be driven by your child's readiness, not an arbitrary timeline. In fact, keeping children in a crib longer is safer: crib sides prevent falls and make it harder for toddlers to wander at night.
Signs Your Child Is Ready
Physical Signs
- Climbing out of the crib — once a child can climb out consistently, there is a fall risk. This is the most common reason for an early transition (often around 18–24 months)
- Reaching the maximum height limit for the crib (typically 90 cm / 35 inches)
- The crib side lowered to its lowest position no longer adequately contains your child
Behavioural Signs
- Frequently asks to sleep in a "big bed"
- Understands and can follow simple boundaries ("stay in bed until the light changes")
- Consistently naps and sleeps well in the crib (transitions are harder during sleep regressions)
- Is potty training and needs to access the bathroom independently at night
Signs It Is Too Early
- Under 18 months: toddlers this young rarely understand stay-in-bed boundaries
- Going through a major life transition (new sibling, house move, new childcare) — add one change at a time
- Currently in a sleep regression or fighting naps
How to Make the Transition
1. Lower the Crib First
Before buying a toddler bed, try lowering the crib mattress to the lowest position. This may delay the need to transition while still accommodating a growing child.
2. Choose the Right Bed
- Toddler bed: Uses a crib-sized mattress (easier transition, lower to the ground, often has guard rails). Suitable until around age 5
- Single/twin bed with guard rails: Skips the toddler bed stage. More expensive upfront but lasts much longer
- Floor mattress: The safest option — no fall risk at all. Some families simply place the crib mattress on the floor during the transition
3. Involve Your Child
Let them help choose bedding, a new pillow, or a special soft toy for the big bed. Building excitement helps reduce resistance.
4. Keep Everything Else the Same
Maintain the exact same bedtime routine. Change only the sleep surface, not the timing, sequence of activities, or sleep environment. Familiarity is critical during transitions.
5. Use a Visual Cue for Morning
A toddler clock (Gro Clock, Hatch, etc.) teaches children to stay in bed until a visual cue (light colour change, picture) signals morning. This is highly effective for preventing 5 a.m. wake-ups and wandering.
6. Childproof the Room
Before the first night in the big bed, assume your child will get out of bed. Ensure:
- The room or doorway has a safety gate
- Furniture is anchored to the wall (tip-over risk)
- Blind cord and electrical hazards are secured
- Accessible windows have safety locks
What to Expect After the Transition
- Night wandering is common in the first 2–4 weeks. Calmly, consistently return your child to bed with minimal interaction.
- Bedtime resistance may increase temporarily as children test the new boundary of being able to get out of bed.
- Earlier wake-ups — without crib walls, children may get up earlier. A toddler clock and a room-darkening blind can help.
- Most children settle into the new arrangement within 2–4 weeks if parents are consistent.
When NOT to Rush
The AAP does not set a specific age for the crib-to-bed transition. If your child is safe in the crib and sleeping well, there is no developmental or health reason to rush. Many parents transition too early and create sleep problems that would not have existed if they had waited.
Do not transition because:
- A new sibling needs the crib (buy or borrow a second crib, or use a Moses basket/bassinet for the newborn for the first few months)
- You think they "should" be in a big bed by a certain age
- The child occasionally mentions wanting a big bed but is otherwise sleeping well