Can a cot bed be used as a toddler bed straight away?
Short answer: Most cot beds convert into a toddler bed by removing the sides. Follow the maker's instructions and check the mattress still fits snugly.
Here is the detail behind that answer, taken from current UK guidance from the NHS and the Lullaby Trust.
Things to check
- Check the mattress size listed for the frame. 140 x 70cm is common, but not universal.
- Keep every conversion panel, bolt and instruction sheet for the toddler-bed stage.
- Look at adjustable base heights, teething rails and any matching furniture.
What the guidance says
- Use a firm, flat, waterproof mattress in good condition, with no raised or cushioned edges, that fits the cot or Moses basket with no gaps.
Related questions
What is a cot bed?
A cot with removable sides and ends that converts into a toddler bed, most often taking a 140 x 70cm mattress.
Shop at Baby Kingdom
- Misha Cot Bed
- Obaby Grace Inspire Cot Bed & Under Drawer - Hello World Koala Grey
- Stamford Luxe Sleigh Cot Bed - White
- Vox Vintage Fresh Convertible Cot Bed 70 x 140cm
Check each product page for its exact dimensions, mattress size, age and weight limits and safety standards.
More advice
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Sources
- The Lullaby Trust: Baby mattresses and bedding (accessed 2026-10-21)
General information only, not medical advice. Always follow your product's instructions. If you are worried about your baby, contact your GP, health visitor or 111. In an emergency, call 999.