Bed Size Calculator

The Bed Size Calculator helps you choose the perfect bed size considering number of people, users' height and room dimensions. Ideal for furniture planning, interior design and space optimization. Essential tool for architects, decorators and people who want to better utilize bedroom space ensuring ideal comfort for good sleep.

Updated at: 06/20/2025
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How the Bed Size Calculator Works

The Bed Size Calculator is an essential tool for selecting the ideal bed dimensions based on individual needs. It considers the number of users, their height, sleeping style, and available room space to ensure both comfort and optimal use of bedroom layout.

Ideal for architects, interior designers, furniture sellers, and anyone designing or upgrading a sleeping space, this calculator helps avoid sizing errors, improves room flow, and ensures a restful sleep setup.

Formula and Criteria for Calculating Bed Size

The Bed Size Calculator uses a combination of factors to determine the most appropriate bed:

  • User Height: The bed length should be at least 10–20 cm longer than the tallest person.

  • Room Size: Ensures there’s adequate walking space and furniture placement.

  • Sleep Style: Quiet sleepers need less space, while those who move more at night require additional width.

  • Standard Size Options: Recommends existing mattress sizes (e.g., Single, Queen, King).

In the provided example:

  • 1 person

  • Height: 180 cm

  • Room: 200 × 300 cm

  • Sleep style: Quiet sleeper

The calculator recommends a Single Extra bed: 96 × 203 cm, offering extra length and comfort without overcrowding the room.

Example: Choosing the Right Bed for a 180 cm Tall Person

Let’s break down this specific scenario:

  • User height: 180 cm

  • Minimum bed length required: 180 + 20 = 200 cm

  • Recommended bed size: 96 × 203 cm (Single Extra)

  • Room dimensions: 200 × 300 cm

  • Room area: 6.0 m²

Remaining free space after bed placement:

  • Width: 200 - 96 = 104 cm

  • Length: 300 - 203 = 97 cm

This ensures enough room for walking and placing additional furniture like side tables or dressers.

Can I fit a larger bed in this room?

Yes, but only up to a certain size. The calculator notes that the maximum bed size the room can accommodate while maintaining usability is 140 × 240 cm. Anything larger would compromise free movement and practical space for other furniture.

If you want a double bed, you’d need to:

  • Accept reduced free space

  • Consider minimalist room arrangements

  • Possibly adjust layout or furniture positioning

What’s the best bed size for tall people?

For individuals taller than 180 cm, it’s best to choose beds with a length of at least 200 cm. Options include:

  • Single Extra (96 × 203 cm) – Great for solo sleepers

  • Double Extra (135 × 203 cm) – Comfortable for one or tight for two

  • Queen (152 × 203 cm) – Ideal for taller couples

  • King (193 × 203 cm) – Maximum luxury and space

Some custom beds can go up to 210 or 220 cm in length for very tall sleepers.

Can two people sleep on a Single Extra bed?

Technically possible, but not recommended. A Single Extra bed offers 96 cm width—tight for two people, even if both are quiet sleepers. For two adults, a Double (135 cm) or larger is more comfortable.

Suggested bed sizes for two people:

  • Double – Basic comfort for couples in small rooms

  • Queen – More elbow room

  • King – Maximum space and sleep quality

Reference Table: Bed Sizes and Recommendations

Bed Type Dimensions (cm) Suitable For Minimum Room Size
Single 90 × 190 1 person (avg height) 6 m²
Single Extra 96 × 203 1 tall person 6 m²
Double 135 × 190 2 people (tight fit) 8 m²
Queen 152 × 203 2 people (comfortable) 9–10 m²
King 193 × 203 2 people (luxury fit) 12+ m²

Does sleep style really affect bed choice?

Yes. Sleep style directly impacts how much space a person needs. Here’s how:

  • Quiet sleepers: Stay mostly still, need less width.

  • Active sleepers: Toss and turn more, need wider beds.

  • Side sleepers: Often shift more than back sleepers.

  • Co-sleepers with pets or kids: Require extra room.

By selecting your sleep style in the calculator, it adjusts the bed width suggestion accordingly.

How to maximize comfort without upsizing the bed?

If your room limits the bed size, try these tips:

  • Use a mattress topper for extra softness

  • Choose space-saving bed frames (with storage)

  • Keep bedding minimal to avoid clutter

  • Position bed against walls to free up floor area

  • Use vertical storage instead of bulky furniture

These ideas help create a cozy and efficient bedroom layout, even with smaller beds.