There is no set age determining when you should convert your convertible crib to a toddler bed. While most children are ready for a toddler bed anywhere from 18 months to 3 years of age, you'll want to make sure you don't make the move too early or too late. If your child won't sleep through the night in her new toddler bed, you may want to go back to a crib until she's ready. On the other hand, if your child is becoming very active, it's a good idea to change your convertible crib to a toddler bed to keep your little one from climbing out of the convertible crib and risking a fall.
The clearest sign that my toddler is growing up way faster than I would like is his transition from his crib to a toddler bed. We lowered the base of his crib when he was 8 months old, but then he started pulling himself up to standing position. When he turned 16 months, we finally moved him out of the master bedroom to his older brother’s room. He has tried to climb out of the crib several times, so we decided it was time to take the rails off of one side and put a spare mattress we had lying around next to his now-open crib.
My baby girl, on the other hand (21 months old), is always anxious to move to the next stage. She is so determined to keep up with her big brother ( age 6) and her older cousins that she doesn’t want anything to do with “baby” things. So a few months ago she decided that she was completely done using her crib. If we put her in it she would just climb right out, which was not only unproductive, but also unsafe. We thought she might be ready for a toddler bed, but she rolls around in her sleep a lot, and I worried that she would roll right off. So, taking inspiration from the many “reading nooks” found on Pinterest, my husband and I decided to transform her crib into a toddler bed.