What Is a Cot Bed? | Toddler Bed Basics

You’ll remove one or both sides, and sometimes an end panel, to turn the crib into a junior bed a toddler can climb into independently.

The term itself causes confusion. In British English, “cot” means the baby bed, so a “cot bed” is the convertible version. In American English, “cot” usually means a folding camp bed, while the baby bed is a crib. If shopping from the US, you’ll mostly see the term on UK-based websites and listings.

What Makes a Cot Bed Different From a Crib?

A standard crib is a fixed frame with four sides that safely contains a baby. A cot bed adds conversion features, with the key difference being removable side rails or panels. Once your child is old enough to climb out, you remove one or both sides to create a low, open toddler bed. Some cot beds convert further into a small single bed by removing an end panel—model-specific, so confirm before buying. Conversion ranges vary; many are rated from birth to around four years, with some editorial sources extending the span to four to six years.

Cot Bed Sizes and Mattress Compatibility

Always check the manufacturer’s specification for your exact model.

Materials range from pine to a mix of oak, MDF, and particle board—design choices, not standards.

How Do You Convert a Cot Bed?

Conversion is usually straightforward but depends on the manufacturer. The general process involves removing one or both side rails, and sometimes an end panel, per product instructions. Only make the change when your child is developmentally ready for a toddler bed and instructions say it’s appropriate.

Always use the correct mattress size: a mattress too small leaves gaps where a child could get trapped. After configuration changes, check that all hardware is secured to prevent instability and pinch hazards. Adjust the base height as your child grows—most offer three positions, with the highest for newborns and lowest for older babies who can stand.

Safety Standards and Practical Buying Notes

These apply to the specific product carrying the marking, so don’t assume every cot bed meets them automatically.

When shopping, match the bed to your child’s size, not just age. Check the manufacturer’s stated weight and height limits—some cot beds comfortably take a child until age five or six, while others are rated for a shorter span. The biggest mistakes to avoid are confusing a cot bed with a US camping cot, buying a standard cot mattress for a cot bed (or the reverse), and assuming every model converts the same way.

A cot bed makes sense if you want one piece of furniture lasting from nursery through toddler years. To compare specific models, our roundup of the best cot bed options on the market covers top-rated choices with key specs and features.