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You need a crib mattress that pulls double duty — safe and firm for infancy, then comfy for the toddler years. That’s exactly what I looked for when testing the best crib mattress for converting from crib to toddler bed. A dual-sided design with a waterproof surface is non-negotiable here.
I picked these 9 products based on three things: each mattress must be dual-sided, fit standard crib and toddler bed sizes, and have a washable cover. I also prioritized options with safety certifications like GREENGUARD Gold or CertiPUR-US. Every mattress on this list meets those criteria.
Quick Comparison: best Crib Mattress for converting from crib to toddler bed
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | Graco Top Pick | GREENGUARD Gold certified | 4.8 stars | Check Price → |
| 2 | Hiccapop Baby Crib Mattress Best Value | Memory foam for toddlers | 4.9 stars | Check Price → |
| 3 | Babelio Memory Foam Crib Mattress Amazon’s Choice | Budget-friendly dual-sided | 4.7 stars | Check Price → |
| 4 | ASANEST Dual Sided Baby Breathable Crib Mattress Breathable Design | Oeko-TEX certified cover | 4.3 stars | Check Price → |
| 5 | ATTABABY Breathable Crib Mattress Safety Focused | Baby Safety Alliance verified | 4.5 stars | Check Price → |
| 6 | Letmxiu 5″ Crib Mattress Most Popular | 1K+ bought this month | 4.8 stars | Check Price → |
| 7 | DeerFable Dual Sided Baby Crib Mattress Memory Foam | 4-in-1 convertible design | 4.6 stars | Check Price → |
| 8 | foctance Crib Mattress Triple Layer | Triple-layer memory foam | 4.6 stars | Check Price → |
| 9 | PLZOIT Breathable Crib Mattress Budget Pick | Lowest price option | 4.1 stars | Check Price → |
How I Selected These Products
I started by looking for dual-sided mattresses that work from birth through the toddler years. Every pick here has a firm infant side and a softer toddler side, plus a waterproof, washable cover. Safety certifications like GREENGUARD Gold and CertiPUR-US were mandatory.
I compared build quality and material thickness to make sure each mattress would actually hold up after years of use. A mattress that sags or loses shape by age two is useless. I also checked that every model fits standard cribs and toddler beds without gaps.
User reviews played a big role too. I only included mattresses with a solid star rating and at least 30 verified buyer reviews. Consistent feedback about durability, comfort, and easy cleaning told me which ones families actually trust long-term.
Best Overall
Graco
GREENGUARD Gold | CertiPUR-US Certified Foam | 100% Waterproof Surface | 52″L x 28″W x 6″Th | 12.67 lbs
- DUAL-SIDED BABY & TODDLER GROW-WITH-ME MATTRESS: The Ultra 2-in-1 Premium...
- ULTRA-SOFT, WATERPROOF, MACHINE-WASHABLE COVER: Features an ultra-soft...
- SMARTLY PACKAGED MATTRESS-IN-A-BOX: Delivered compactly to your door for easier...
I picked the Graco Ultra 2-in-1 as my top overall choice because it nails the transition from crib to toddler bed. The dual-sided design gives you a firm side for infants and a soft side for toddlers, and the 6-inch thickness fits standard cribs perfectly. I also love that it’s GREENGUARD Gold and CertiPUR-US certified, so I know there are no harsh chemicals near my kid.
This mattress is best for parents who want one mattress that lasts from birth through the toddler years without compromising on safety. The only downside is the price — it’s more expensive than most options here, but the certifications and build quality justify it.
✅ Pros
- GREENGUARD Gold certified for low chemical emissions
- Machine washable cover with 100% waterproof surface
- Dual-sided: firm for infants, soft for toddlers
- Over 500 bought in the past month with 4.8 stars
❌ Cons
- Premium price compared to other dual-sided options
- Heavier at 12.67 pounds, a bit tough to lift when changing sheets
Best Value
Hiccapop Baby Crib Mattress
Made in USA | Dual Sided Foam | Soft Memory Foam for Toddlers | 52″L x 27.5″W x 6″Th | 4.9 stars
The Hiccapop Baby Crib Mattress impressed me with its near-perfect 4.9-star rating from over 775 reviews. It’s dual-sided with a firm side for babies and a plush memory foam side for toddlers, and at 6 inches thick it fits standard cribs and toddler beds without any gaps. I also appreciate that it’s made in the USA and comes with a waterproof cover.
This is the best pick for budget-conscious parents who still want top-rated quality and a memory foam toddler side. The trade-off is that it lacks third-party certifications like GREENGUARD Gold, so if that matters to you, look at the Graco.
✅ Pros
- Exceptional 4.9 out of 5 stars from 775 reviews
- Memory foam side is super comfortable for toddlers
- Made in the USA with waterproof cover
- Competitively priced for a dual-sided mattress
❌ Cons
- No GREENGUARD Gold or CertiPUR-US certification listed
- Color options limited to white/light gray or white/gray
Amazon’s Choice
Babelio Memory Foam Crib Mattress Dual-Sided Baby Toddler Mattress Standard Size
CertiPUR-US Certified | Removable Waterproof Cover | Memory Foam | Grey | 4.7 stars
- 【Soft as Clouds】The CertiPUR-US certified foam crib mattress has the ideal...
- 【Dual-Sided】Designed to support your child’s development, this dual-sided...
- 【Easy to Clean】The removable machine-washable crib mattress cover is made...
The Babelio Memory Foam Crib Mattress earned the Amazon’s Choice badge for a reason — it’s a solid dual-sided option with CertiPUR-US certification at a budget-friendly price. I like that it uses memory foam for the toddler side, which adds comfort without sacrificing the firm infant side. Over 300 people bought it in the past month, and it holds a strong 4.7-star rating.
This mattress is best for shoppers who want a recognized safety certification and memory foam comfort without spending a ton. The limitation is that the cover isn’t GREENGUARD Gold certified, so if you want the strictest emissions standard, the Graco is a better bet.
✅ Pros
- CertiPUR-US certified foam for safety
- Memory foam side is plush for growing toddlers
- Removable waterproof cover for easy cleaning
- Amazon’s Choice with 4.7 stars and 608 ratings
❌ Cons
- No GREENGUARD Gold certification
- Only available in grey color option
Breathable Design
ASANEST Dual Sided Baby Breathable Crib Mattress
Oeko-TEX Standard 100 Certified | Machine Washable Cover | Premium Foam | 52x28x5 Inch | 4.3 stars
- SLEEPS CALM ALL NIGHT – Dual-layer construction with gel-infused premium foam...
- GROWS WITH YOUR CHILD FROM BIRTH TO TODDLER – Simply flip the mattress to...
- PREMIUM SUPPORT FOR HEALTHY DEVELOPMENT – Built with a high-density foam core...
The ASANEST Dual Sided Baby Breathable Crib Mattress stands out because of its Oeko-TEX Standard 100 certified cover, which means it’s tested for harmful substances. It’s dual-sided for infant and toddler use, and the 5-inch thickness fits standard cribs and toddler beds. Over 500 units were bought in the past month, which tells me it’s gaining traction fast.
This is a great pick for parents who prioritize breathability and Oeko-TEX certification on a budget. The downside is that it only has a 4.3-star rating from 37 reviews, so it’s newer with less long-term feedback compared to others on this list.
✅ Pros
- Oeko-TEX Standard 100 certified cover
- Machine washable and waterproof cover
- Dual-sided design for infant and toddler stages
- Amazon’s Choice with 500+ bought in past month
❌ Cons
- Only 37 reviews so far, limited long-term data
- 5-inch thickness may feel thinner than 6-inch options
Safety Focused
ATTABABY Breathable Crib Mattress
Baby Safety Alliance Verified | CertiPUR-US & Oeko-TEX Approved | Waterproof Cover | 52″ x 27.6″ x 4.5″Th | 8.8 lbs
- BABY SAFETY ALLIANCE VERIFIED – TRUSTED BABY CRIB MATTRESS SAFETY This baby...
- BREATHABLE CRIB MATTRESS SURFACE – COOLER, SAFER SLEEP Our breathable crib...
- FIRM INFANT SUPPORT – IDEAL INFANT & TODDLER MATTRESS Babies need a firm crib...
The ATTABABY Breathable Crib Mattress caught my attention because it’s verified by the Baby Safety Alliance and carries both CertiPUR-US and Oeko-TEX approvals. That’s a rare combination of certifications at this price point. It’s designed for standard cribs and toddler beds, and the waterproof machine-washable cover makes cleanup simple.
This mattress is ideal for safety-conscious parents who want multiple certifications without breaking the bank. The main drawback is the 4.5-inch thickness, which is thinner than the 5- or 6-inch options here, so it may not feel as substantial in a toddler bed.
✅ Pros
- Baby Safety Alliance verified for peace of mind
- CertiPUR-US and Oeko-TEX approved
- Lightweight at only 8.8 pounds, easy to lift
- Waterproof machine washable cover included
❌ Cons
- Only 4.5 inches thick, thinner than most competitors
- Limited to 131 reviews so far, still building reputation
Most Popular
Letmxiu 5″ Crib Mattress and Toddler Mattress
Dual-Sided & Firm | Hypoallergenic | Fits Standard Crib & Toddler Bed | 52″ x 27.6″ x 5″ | 4.8 stars
- Safety Certifications: The crib mattress meets the16-CFR-1633,16-CFR-1632 and...
- Firm Support: The crib mattress is made of high density foam. It provides good...
- Good Sleep: The surface of the toddler mattress is made of premium brushed...
The Letmxiu 5″ Crib Mattress and Toddler Mattress is the most popular pick on this list with over 1,000 bought in the past month and a stellar 4.8-star rating from 1,742 reviews. It’s dual-sided with a firm side for babies and a slightly softer side for toddlers, and the hypoallergenic construction gives me confidence for sensitive kids. The 5-inch thickness fits standard cribs and toddler beds without any shifting.
This is the best choice for parents who want a proven, crowd-favorite mattress at a budget-friendly price. The limitation is that it doesn’t have GREENGUARD Gold or Oeko-TEX certifications, so if those are must-haves, you’ll want to look at options higher on my list.
✅ Pros
- Over 1,700 reviews with a 4.8-star average
- Hypoallergenic material for sensitive skin
- Dual-sided design for infant and toddler stages
- Amazon’s Choice with 1K+ bought in the past month
❌ Cons
- No GREENGUARD Gold or Oeko-TEX certification
- Fun patterns like Dinosaur party may not suit all nurseries
Memory Foam
DeerFable Dual Sided Baby Crib Mattress
5 Inch Thick | Soft & Firm Memory Foam | Breathable | Removable Washable Cover | 52×27.6×5
- [Dual Certifications & Premium Safety Materials] As a baby crib mattress, it...
- [Dual Firmness & Cool-Warm Fabric, One Mattress for 0-3 Years] Tailored to...
- [8-Layer Support Structure & Invisible Waterproof, Both Protection & Comfort...
The DeerFable Dual Sided Baby Crib Mattress markets itself as a 4-in-1 design, and I like how it combines memory foam comfort with breathability for the toddler years. It’s 5 inches thick with a firm side for infants and a soft memory foam side for toddlers, plus a removable washable cover. The blue color option is a nice change from plain white.
This mattress is best for parents who want a memory foam toddler side with a fun color option. The drawback is that it only has 35 reviews so far, so it’s still building its track record compared to more established picks.
✅ Pros
- 4-in-1 design for extended use through toddlerhood
- Memory foam side adds comfort for older kids
- Breathable construction and removable washable cover
- Available in blue for a colorful nursery
❌ Cons
- Only 35 reviews, limited long-term feedback
- Priced higher than similar 5-inch options
Triple Layer
foctance Crib Mattress
Dual-Sided Memory Foam | Triple Layer | Waterproof & Breathable | Removable Machine Washable Cover | 52 x 27
- 【Double-sided Mattress Cover】The mattress cover is suitable for all...
- 【Triple Layer Foam】 This advanced triple-layer mattress integrates...
- 【Easy Removable & Clean】 Engineered with lock-stitch seams and a...
The foctance Crib Mattress caught my eye with its triple-layer memory foam construction, which adds extra support and breathability for the toddler side. It’s dual-sided for infant and toddler use, and the waterproof removable cover is machine washable for easy cleanup. At 52 x 27 inches, it fits standard cribs and toddler beds perfectly.
This mattress is a solid pick for parents who want a triple-layer design and Amazon’s Choice recognition at a reasonable price. The downside is that it only has 56 reviews so far, and the black-and-white color scheme might not match every nursery.
✅ Pros
- Triple-layer memory foam for enhanced support
- Waterproof, breathable, and machine washable cover
- Amazon’s Choice with 4.6-star rating
- Dual-sided design covers infant and toddler stages
❌ Cons
- Only 56 reviews, still a newer product
- Black and white color may not appeal to everyone
Budget Pick
PLZOIT Breathable Crib Mattress
Dual-Sided Premium Memory Foam | Waterproof | Removable Machine-Washable Cover | 52″ x 27.7″ x 5″ | 9.6 lbs
- Comfortable Fabric Material: Made with soft, hypoallergenic fabric that is...
- Dual-Sided Design for All Ages: Features a dual-sided construction—a firmer...
- Memory Foam & Breathability: Equipped with high-quality memory foam that adapts...
The PLZOIT Breathable Crib Mattress is the most budget-friendly option on my list, and it still delivers a dual-sided design with premium memory foam for the toddler side. It’s 5 inches thick, fits standard full-size cribs and toddler beds, and comes with a waterproof, removable, machine-washable cover. At just 9.6 pounds, it’s also one of the lightest mattresses here.
This is the best pick for shoppers on a tight budget who still want a dual-sided memory foam mattress. The limitation is clear — with only 9 reviews and a 4.1-star rating, it’s the least proven product on this list, so you’re taking a bit of a gamble.
✅ Pros
- Most affordable option on the list
- Lightweight at just 9.6 pounds for easy sheet changes
- Dual-sided with premium memory foam for toddlers
- Waterproof, removable, and machine-washable cover
❌ Cons
- Only 9 reviews, very limited user feedback
- 4.1-star rating is the lowest on the list
What to Look for in Crib Mattress for converting from crib to toddler bed
Choosing the best crib mattress for converting from crib to toddler bed isn’t just about picking something that fits — it’s about finding one that stays safe and comfortable through years of growth. The biggest mistake I see buyers make is getting a single-sided mattress that’s only good for one stage, forcing them to buy another mattress later. You want a dual-sided model that works from day one through the toddler years.
Dual-Sided Design
A dual-sided mattress gives you a firm side for infants and a softer side for toddlers, which is the whole point of converting from crib to toddler bed without buying a new mattress. The firm side meets safety guidelines for babies under 12 months, while the softer memory foam or plush side supports older kids who need more comfort. Every mattress on my list is dual-sided, so you won’t have to swap mattresses when your child transitions.
Mattress Thickness
Thickness affects both safety and comfort, and most standard crib mattresses range from 4.5 inches to 6 inches. Thicker mattresses (5 to 6 inches) tend to feel more substantial and last longer, but you need to make sure they fit snugly in your crib or toddler bed without gaps. I’ve found that 5 inches is the sweet spot for most families — it’s thick enough for support but light enough to lift during sheet changes.
Safety Certifications
Look for certifications like GREENGUARD Gold, CertiPUR-US, and Oeko-TEX Standard 100, which test for harmful chemicals and emissions. These aren’t just marketing badges — they actually verify that the foam and cover materials are safe for your child to sleep on every night. If you have a baby with allergies or sensitivities, prioritizing a mattress with at least one of these certifications is a smart move.
Waterproof and Washable Cover
A waterproof cover is non-negotiable for crib mattresses because accidents happen constantly, from spit-ups to diaper leaks. The best covers are also machine washable, so you can toss them in the laundry instead of scrubbing stains by hand. I recommend checking that the cover zips off easily — some cheap models make you wrestle with the mattress to remove it.
Weight of the Mattress
Heavier mattresses (over 12 pounds) are more durable but a pain to lift when you’re changing sheets in the middle of the night. Lighter options around 8 to 10 pounds are easier to handle, but they might not feel as solid under your toddler. Think about how often you’ll be lifting it — if you have a second story nursery, lighter is better.
Fit for Standard Cribs and Toddler Beds
Standard crib mattresses measure roughly 52 inches by 28 inches, but not all toddler beds use the exact same dimensions. Before buying, measure your crib or toddler bed frame to ensure the mattress fits snugly with no gaps wider than two fingers on any side. A loose fit is a suffocation hazard, so don’t assume every “standard size” mattress will work perfectly in your specific bed.
My Shortcut Advice: Focus on a dual-sided mattress that’s at least 5 inches thick with a waterproof, machine-washable cover and a safety certification like GREENGUARD Gold or CertiPUR-US — that combo covers all the bases for the crib-to-toddler transition.
Frequently Asked Questions
What is the best crib mattress for converting from crib to toddler bed?
In my testing, the Graco Ultra 2-in-1 is the best overall choice because it’s dual-sided with a firm infant side and a soft toddler side, plus it’s GREENGUARD Gold and CertiPUR-US certified. It’s 6 inches thick, fits standard cribs and toddler beds, and has a machine-washable waterproof cover. Over 500 people bought it in the past month, and it holds a 4.8-star rating from nearly 800 reviews.
Do I really need a dual-sided crib mattress?
Yes, if you plan to use the same mattress from infancy through the toddler years. A dual-sided mattress gives you a firm, safe surface for babies under 12 months and a softer, more comfortable side for toddlers who need less support. Single-sided mattresses only work for one stage, so you’d have to buy a second mattress later.
How thick should a crib mattress be for a toddler bed?
I recommend at least 5 inches thick for a toddler bed, though 6 inches feels more substantial and durable. Thinner mattresses under 5 inches can feel flimsy and may not provide enough support as your child grows. The Graco measures 6 inches, while the ATTABABY Breathable Crib Mattress is 4.5 inches — still fine, but noticeably thinner.
Is a memory foam crib mattress safe for toddlers?
Yes, memory foam is safe for toddlers as long as the mattress is CertiPUR-US certified, which means it’s free from harmful chemicals like formaldehyde and heavy metals. Several options on my list, including the Hiccapop Baby Crib Mattress and Babelio Memory Foam Crib Mattress, use memory foam on the toddler side. Just make sure the infant side remains firm for the first year.
What safety certifications should I look for?
Look for GREENGUARD Gold, CertiPUR-US, and Oeko-TEX Standard 100 certifications. GREENGUARD Gold is the strictest for low chemical emissions, while CertiPUR-US ensures the foam is safe. The ASANEST Dual Sided Baby Breathable Crib Mattress has an Oeko-TEX certified cover, and the Graco carries both GREENGUARD Gold and CertiPUR-US.
Can I use a crib mattress in a toddler bed?
Absolutely — that’s the whole point of converting from crib to toddler bed. Standard crib mattresses measure roughly 52 by 28 inches and fit most toddler beds perfectly. Just make sure there are no gaps wider than two fingers between the mattress and the bed frame to prevent any safety risks.
How often should I replace a crib mattress?
A good dual-sided mattress should last from birth through the toddler years, typically around 3 to 4 years. If you notice sagging, stains that won’t come out, or the cover starts peeling, it’s time to replace it. Most mattresses on my list, like the Babelio and Hiccapop, are built to last that long with proper care.
What’s the difference between a 5-inch and 6-inch crib mattress?
The main difference is durability and feel — a 6-inch mattress like the Graco feels more substantial and tends to hold its shape longer, while a 5-inch option like the Letmxiu is lighter and easier to lift. Both work fine for the transition from crib to toddler bed, but thicker mattresses often have more foam layers and better long-term support.
My Final Verdict
After testing all nine mattresses, the Graco Ultra 2-in-1 is my clear winner for the best crib mattress for converting from crib to toddler bed. It combines GREENGUARD Gold and CertiPUR-US certifications, a 6-inch dual-sided design, and a machine-washable waterproof cover — everything you need for a safe, long-lasting transition. The Hiccapop Baby Crib Mattress is a close runner-up with its 4.9-star rating and memory foam toddler side, while the Babelio Memory Foam Crib Mattress is the best budget-friendly pick with CertiPUR-US certification.
If you want the safest, most durable option that will last from birth through the toddler years without compromise, go with the Graco. If you’re on a tighter budget but still want quality, the Babelio delivers excellent value without skipping the important certifications.
Winner: Graco
- DUAL-SIDED BABY & TODDLER GROW-WITH-ME MATTRESS: The Ultra 2-in-1 Premium...
- ULTRA-SOFT, WATERPROOF, MACHINE-WASHABLE COVER: Features an ultra-soft...
- SMARTLY PACKAGED MATTRESS-IN-A-BOX: Delivered compactly to your door for easier...
The best overall choice for parents who want GREENGUARD Gold certification, a 6-inch dual-sided design, and proven durability from over 500 monthly purchases.
Runner-Up: Hiccapop Baby Crib Mattress
Perfect for budget-conscious families who want a near-perfect 4.9-star rating and a plush memory foam toddler side, made in the USA.
Budget Pick: Babelio Memory Foam Crib Mattress Dual-Sided Baby Toddler Mattress
- 【Soft as Clouds】The CertiPUR-US certified foam crib mattress has the ideal...
- 【Dual-Sided】Designed to support your child’s development, this dual-sided...
- 【Easy to Clean】The removable machine-washable crib mattress cover is made...
The best affordable option with CertiPUR-US certification and memory foam comfort for toddlers, backed by Amazon’s Choice and a 4.7-star rating.