MATTRESS/CHART

TRUE-SCALE SIZE & ROOM PLANNER

See what fits before you buy.

Choose a mattress, enter your room, and see the real clearance—not a generic “minimum room size.”

Units

01

Choose a mattress

Nominal North American sizes. Exact branded products and frames can vary by roughly an inch.

02

Enter the room

Measure finished wall to finished wall.

Quick rooms

03

Who is sleeping here?

Sleepers
Tallest sleeper
Planning preferences Clearance, furniture, and recommendation style
Walking-clearance target

Planning presets—not building-code or accessibility guarantees.

Recommendation preference

LIVE PLAN

Your room, drawn to scale

Queen mattress in a ten by twelve foot room A Queen mattress is centered on the headboard wall with thirty inches of space on both sides and sixty-four inches at the foot. Queen 60 × 80 in
Drag the mattress to test placement. 10 ft × 12 ft room

Current result

Queen fits comfortably.

Centered in a 10 × 12 ft room, it leaves about 30 in on each side and 64 in at the foot.

Mattress
60 × 80 in
Per sleeper
30 in wide
Length margin
10 in
Surface area
33.3 sq ft
BEST BALANCED FIT
QueenGood circulation, enough length, and 30 in per sleeper.
Compare sizes

Your measurements stay in this browser. No account or signup.

TRUE-SCALE COMPARISON

The difference, without the guesswork.

Align up to three mattresses at the headboard and compare width, length, area, personal space, and fit in your current room.

Common matchups
Queen and King mattress comparison A Queen mattress is sixty inches wide and a King is seventy-six inches wide. Both are eighty inches long. Queen King
Footprints are proportional and aligned at the headboard.

King is 16 in wider and the same length as Queen. It provides 26.7% more surface area.

MetricQueenKing
Dimensions60 × 80 in76 × 80 in
Surface area33.3 sq ft42.2 sq ft
Width / sleeper30 in38 in
In your roomComfortableTight
Side clearance30 in22 in
Use in planner

In your current 10 × 12 ft room, Queen meets the 30 in target; King fits physically but leaves 22 in on each side.

DIMENSION REFERENCE

Mattress size chart

Standard US and Canadian nominal dimensions. Select another sizing region in the planner to update this chart.

US / Canada6 standard sizes

Saves the current region, units, and size filter as a print-ready image.

Size Dimensions Metric Area Useful for Action
TwinSingle38 × 75 in96.5 × 190.5 cm19.8 sq ftChildren, bunks, compact rooms
Twin XLExtra Long Twin38 × 80 in96.5 × 203.2 cm21.1 sq ftTall singles and dorms
Full / DoubleFull54 × 75 in137.2 × 190.5 cm28.1 sq ftSpacious singles, guest rooms
Queen60 × 80 in152.4 × 203.2 cm33.3 sq ftMost couples and guest rooms
KingEastern King76 × 80 in193 × 203.2 cm42.2 sq ftCouples wanting maximum width
California KingCal King72 × 84 in182.9 × 213.4 cm42 sq ftTall sleepers and long rooms

Measure the product, not just the name. These are planning standards. Foam expansion, upholstery, rounding, and manufacturer tolerances can change an actual mattress by roughly an inch. Frames and bedding can require additional clearance.

MEASURE ONCE, BUY BETTER

How to measure a mattress and room

A room can physically hold a bed and still feel awkward. Measure the footprint, circulation, and the things that open into the space.

  1. 1

    Measure the mattress itself

    Measure edge to edge at the widest and longest points, without compressing the sides. Use the exact product dimensions when a manufacturer supplies them.

  2. 2

    Measure finished wall to finished wall

    Record the usable room width and length—not a listing’s rounded room size. Note baseboards, radiators, sloped ceilings, columns, and built-ins.

  3. 3

    Reserve the path you need

    Check doors, drawers, closets, and the side you actually use to get into bed. The planner’s 24, 30, and 36 inch targets are practical presets, not code guarantees.

WHAT THE CALCULATOR DOES

Geometry first. Recommendations second.

MattressChart subtracts the selected mattress footprint from your room, then calculates the remaining clearance on each side and at the foot. Placement, rotation, and optional furniture change that result immediately.

The recommendation layer ranks only sizes that make geometric sense, then considers tallest-sleeper length, nominal width per sleeper, your clearance target, and whether you prefer a compact or spacious layout.

Read the full method and assumptions
Canonical calculation unit
Inches
Metric conversion
1 in = 2.54 cm
Default room
10 × 12 ft
Default planning target
30 in / 76 cm
Recommendation type
Advisory, explainable, non-medical
Personal data storage
None on our server

COMMON QUESTIONS

A few useful caveats

Why does one brand list a Full as 53 inches and another as 54?

Mattress names describe nominal categories, not a perfectly enforced manufacturing standard. Cover materials, foam expansion, rounding, and brand tolerances produce small differences. Enter the exact product as a custom size when fit is close.

Is a California King bigger than a King?

It is longer but narrower. A nominal US California King is 72 × 84 inches; a standard King is 76 × 80 inches. The California King has slightly less total surface area, but four extra inches of length.

What clearance should I leave around a bed?

It depends on how the room is used. MattressChart offers 24 inches as a tight planning target, 30 inches as comfortable, and 36 inches as generous. Door swings, mobility needs, furniture, and local requirements may call for more.

Do mattress names mean the same thing worldwide?

No. A UK King, Australian King, New Zealand King, and US King have different footprints. Switch the sizing region rather than translating the name alone.

Can this guarantee a mattress will be delivered into the room?

No. The tool checks the final room footprint. Delivery also depends on package dimensions, hallways, stairs, lifts, doorway width, bends, and whether the mattress can flex.

LEGAL

Privacy

MattressChart is intentionally small-data. The calculator runs in your browser and does not require an account.

Measurements and shared links

Room dimensions, sleeper settings, custom mattress dimensions, and placement are processed locally in your browser. When you choose “Copy share link,” those settings are encoded in the URL you copy. Anyone who receives that URL can read the included settings.

Cookies and analytics

The application does not set cookies and launches without advertising, affiliate, analytics, or third-party font scripts. Cloudflare, our hosting and security provider, processes ordinary request metadata and may retain security or operational logs under its own policies.

External links

Source links lead to other websites with their own privacy practices. MattressChart does not receive your measurements when you follow those links.

Contact and changes

Material changes to this policy will be reflected on this page. This launch policy was reviewed July 22, 2026.

LEGAL

Terms of use

Use MattressChart as a planning aid, not as a substitute for measuring the room, product, frame, delivery path, or applicable requirements.

Nominal dimensions

Published mattress dimensions are common nominal values. Actual products, frames, foundations, toppers, and bedding can differ. Verify the manufacturer specification and your own measurements before buying or modifying a space.

Clearance and recommendations

Clearance presets and size recommendations are general geometric guidance. They are not architectural, accessibility, safety, medical, or legal advice and do not guarantee comfort, sleep quality, delivery access, or code compliance.

Availability

The service is provided as available without a promise of uninterrupted operation. You remain responsible for decisions made using the output.

TRANSPARENT LOGIC

Method and assumptions

Every displayed result comes from explicit dimensions and simple geometry. There is no hidden AI model deciding which bed you should buy.

Fit calculation

The selected mattress width and length are oriented inside the entered room. The tool calculates left, right, head, and foot clearances from the current placement. A mattress “physically fits” when its footprint does not exceed either room dimension.

Clearance status

For a centered bed, the selected target is checked on both sides and at the foot. For a bed intentionally placed against one side wall, the flush side is excluded and the open side plus foot are checked. Head clearance is shown but is not required because beds commonly sit against the headboard wall.

Recommendation ranking

Recommendable standard sizes receive a large penalty when they do not physically fit. Remaining sizes are ranked using the selected clearance target, length beyond the tallest sleeper, nominal width per sleeper, and the compact/balanced/maximum-space preference. The result always includes reasons and warnings.

Units and precision

Calculations use inches internally. Metric displays use the exact conversion 1 inch = 2.54 centimeters. Regional metric sizes retain their supplied metric dimensions and are converted to inches for geometry.

Furniture overlay

The optional overlay uses two 20 × 20 inch nightstands and a nominal 60 × 18 inch dresser. It is a quick stress test, not a substitute for entering your furniture’s exact measurements.

ABOUT

Why MattressChart exists

A dimension table tells you how big a mattress is. It does not tell you what that footprint does to your room.

MattressChart combines the reference chart, room-fit geometry, true-scale comparison, and basic sleeper-space checks in one free page. The goal is a faster, more honest sizing decision—not a longer shopping funnel.

The launch version contains no ads, affiliate products, signup wall, or opaque recommendation model. Future commercial features, if added, will be clearly disclosed and will not block the core sizing utility.

EXACT DIMENSIONS

Add a custom mattress

Use the manufacturer’s exact specification or your own edge-to-edge measurement.