Mattress and Bed Frame Size Compatibility

When choosing a mattress, width and length are not the only factors — height and frame type are equally important.

Why should the frame be slightly larger than the mattress?

The inner dimensions of the frame should always be at least 1–2 cm larger than the mattress size in both length and width.
This small difference ensures the mattress can be placed easily, flipped when needed, and prevents damage to the edges.
A frame that is too tight will damage the mattress prematurely, while one that is too loose will cause the mattress to “float” and lack proper fixation.

The importance of height

Modern orthopedic mattresses typically range from 20 cm to 36 cm in height.
If your bed frame is deep (for example, with side boards), the mattress height should be chosen carefully so it does not sink too much.
Taller mattresses (30–36 cm) provide more stability and comfort, while shorter ones (20–24 cm) are ideal for compact beds.

Tips for storage/lift-up beds

If the bed is lift-up (with storage), mattress weight and height are especially important.
A maximum mattress height of 25–28 cm is recommended to ensure the lift mechanism works smoothly without excessive strain.
Very tall or heavy mattresses may hinder the opening/closing process and reduce the lifespan of the mechanism.

Practical measuring tips

Measure the inner length, width, and depth of the frame.
Compare these dimensions with your mattress size.
Ensure there is a 1–2 cm gap between the mattress and the frame for easy placement.
For lift-up beds, always consider both mattress weight and height for safe use.

Lift-up Bed Mechanisms and Mattress Weight

When choosing a mattress for a lift-up bed, it’s important to consider not only its size but also its weight and the type of mechanism used in your bed frame.

1. Mechanism Types

Gas lift (gas strut mechanism): The most common option. Ensures easy lifting and holding of the bed frame. Suitable for both medium and heavy mattresses.
Spring mechanism: More affordable but less durable. Recommended for lightweight mattresses. Heavy mattresses may quickly weaken the springs.
Electronic mechanism: Premium option. Lifting is done with the push of a button. Very durable but requires technical maintenance and is more expensive.

2. Mattress Weight

Lightweight (15–25 kg): Works with almost any mechanism, ideal for spring or gas struts.
Medium weight (25–35 kg): The most common category. Requires a strong gas lift to ensure effortless lifting.
Heavy (35 kg+): Typically double or premium mattresses. Requires a durable gas lift or electronic mechanism. Spring systems are not recommended for this weight.

3. Mechanism Strength

Lift-up mechanisms are usually rated in Newtons (N), which shows their strength:

800N–1000N: For light and medium mattresses.
1200N: Strong gas lifts, perfect for medium to heavy orthopedic mattresses.
1600N+: For very heavy mattresses and large, massive beds.

4. Recommendations

Always check the technical specifications of your bed’s mechanism — ensure it supports your mattress weight.
For tall and heavy orthopedic mattresses, it’s best to choose strong gas lifts or an electronic system.
Keep in mind that mattress weight + bed frame weight together must not exceed the maximum load of the mechanism.
The higher and heavier the mattress, the stronger the mechanism should be.

Lift-Up Bed Mechanisms and Mattress Weight

The power of lift-up bed mechanisms is always expressed in Newtons (N), which indicates how much weight a specific gas lift or mechanism can withstand. For example: “1200” or 1200 N means that each gas lift is designed for approximately 120 kg of force (in practice, this equals lifting around ≈ 12 kg of mattress weight in direct motion).

Mechanism Power Levels

800 N: Suitable for lightweight mattresses (20–25 kg). Perfect for thin or medium-height orthopedic models.
1000 N: A more universal option. Handles medium mattresses (25–30 kg) comfortably.
1200 N: Ideal for heavier mattresses (30–40 kg). Commonly used for double or premium orthopedic mattresses.
1400 N and above: Designed for very heavy mattresses (40–50 kg+), including hybrid, deluxe, or extra-thick orthopedic models.

How to Choose?

If your mattress weighs 20–25 kg, choose 800–1000 N.
If your mattress weighs 30–40 kg, go for 1200 N.
If your mattress is 35–50 kg+ and extra tall (30 cm+), you’ll need 1200 N or 1400 N.

Important Tips

The mechanism’s strength must always match the combined weight of the mattress + bed frame.
An overly strong gas lift for a light mattress may feel “too stiff,” making it hard to open.
A weak gas lift will not support a heavy mattress and will wear out quickly.