Skip to content
clever mum Smart Parenting UK

Toddler

When should my toddler move from cot to bed?

The two triggers that force the move

  1. Climbing out — once a toddler can get a leg over the rail, the cot has become a falling hazard and the move is immediate, whatever their age.
  2. Outgrowing it — most cots are done by age 3 on size alone; cotbeds buy longer.

Absent either, there's no rush. Toddlers under about 2½ generally don't understand "stay in bed" as a concept, which is why moving early often trades a contained sleeper for a wandering one.

Setting the room up

  • Treat the whole room as the cot: anchor furniture to the wall, clear blind cords, gate the landing or the bedroom doorway, and assume everything reachable will be investigated at 2am.
  • A bed guard (or the cotbed's toddler rail) prevents rolling out during the settling-in weeks.
  • Keep everything else identical — same sleeping bag or bedding transition done separately, same routine, same bedtime.

The novelty phase

Expect a spell of jack-in-the-box bedtimes and midnight appearances. The boring, consistent response — calmly returning them with minimal chat, every time — settles it within a couple of weeks for most families. Big changes (new sibling, potty training) are worth spacing away from the move if you can.

Buying guide: Best cot mattresses UK

Health answers describe NHS guidance and are not medical advice — for anything urgent, call 111 (or 999 in an emergency). Spotted something out of date? Email editors@clevermum.co.uk.