Furniture measurements are often given in a mixture of centimetres, millimetres, metres, inches and feet, which can make comparing sizes or checking whether a piece will fit more difficult than it needs to be.
Use the Holytown Antiques Furniture Measurement Calculator to convert metric and imperial measurements, compare furniture dimensions, check basic doorway and vehicle clearance, calculate floor area and assess how a piece may fit within your available space.
The calculator is particularly useful when buying antique and vintage furniture online, planning a collection or delivery, or checking measurements before visiting the shop.
For doorway and vehicle checks, treat the result as a first-pass guide only. Corners, staircases, door frames, handles, wheel arches and the ability to rotate or tilt a piece can all affect whether furniture can actually be moved through a space.
How to Measure Furniture Correctly
Accurate measurements are important when buying, selling, collecting or delivering furniture. Antique and vintage furniture can also have projecting mouldings, handles, feet, cornices and other details that make the maximum overall dimensions larger than the main body of the piece.
Where possible, measure the widest, deepest and highest points of the furniture rather than measuring only the central cabinet, table top or seat.
Width
Measure from the furthest point on the left to the furthest point on the right. Include projecting mouldings, handles or other features where they increase the overall width.
Depth
Measure from the furthest point at the front to the furthest point at the back. On cabinets and chests, remember that handles or decorative projections can add to the overall depth.
Height
Measure from the floor or lowest point of the furniture to its highest point. For pieces with removable tops, mirrors or cornices, it can also be useful to record the dimensions of each section separately.
Furniture Measurement Tools Explained
Metric and Imperial Conversion
Furniture measurements may be listed in millimetres, centimetres, metres, inches or feet and inches. The converter allows you to change between metric and imperial measurements so that dimensions are easier to compare.
This is particularly useful with antique furniture, where older descriptions and catalogues may use imperial measurements while modern rooms, vehicles and doorways are often measured in centimetres or millimetres.
Furniture Dimensions
Enter the width, depth and height of a piece of furniture to keep its main dimensions together in one place and convert them into other measurement units.
Use the maximum overall measurements of the piece wherever possible.
Doorway Fit Check
The doorway check provides a quick comparison between the dimensions of the furniture and the opening you have available.
Measure the actual clear opening rather than the nominal size of the door. Open the door fully and measure between the narrowest points of the frame or any projecting fittings.
A positive result should still be treated as an initial guide. Furniture may need to be rotated or tilted, and corners, hallways, staircases, bannisters and restricted turning space can affect whether it can actually reach the room.
Vehicle Fit Check
Use the vehicle section to compare furniture dimensions with the usable loading space of a car, van or other vehicle.
Measure the smallest usable opening as well as the available space inside the vehicle. Wheel arches, seats, door frames and sloping roofs can all reduce the practical loading area.
For larger antique furniture, also consider whether any sections can safely be removed for transport, such as a detachable mirror, cornice, table top or legs.
Floor Area
Calculating the approximate floor area occupied by a piece can help when comparing furniture with the available space in a room.
Floor area alone does not show how much circulation space will remain around the furniture, so for a more detailed room comparison use our Furniture Room Fit & Clearance Calculator.
Artwork and Wall Measurements
The wall and artwork section can help with basic size comparisons when planning where to display a picture, mirror or framed artwork.
For hanging height, spacing, grouped pictures and positioning artwork above furniture, use the more detailed Picture & Mirror Hanging Calculator.
Checking Whether Furniture Will Fit Through a Door
One of the most common problems with larger furniture is discovering that a piece fits comfortably in the room but cannot be moved through the route leading to it.
Before buying or arranging delivery, check more than the final doorway. The complete route may include an entrance door, hallway, internal doors, corners, staircases and landings.
- Measure the furniture at its widest, deepest and highest points.
- Measure the clear width and height of each doorway.
- Check narrow hallways and tight turns.
- Measure stair widths and available headroom.
- Allow for bannisters, radiators and projecting door furniture.
- Check whether removable sections can be safely detached.
For valuable antique furniture, avoid forcing a piece through an opening. Damage to mouldings, veneers, legs and frames can easily occur during an unsuitable move.
Furniture Measurement Example
Imagine you are considering a cabinet measuring:
- Width: 100 cm
- Depth: 45 cm
- Height: 180 cm
Your entrance doorway has a clear opening of:
- Width: 82 cm
- Height: 198 cm
The cabinet is wider than the doorway when presented face-on, but its 45 cm depth may allow it to pass through when correctly rotated.
However, this does not automatically mean delivery will be possible. You would still need to check the turning space immediately before and after the doorway, along with any other restrictions on the route.
Measuring Antique and Vintage Furniture
Antique furniture often requires a little more care when measuring because decorative features and traditional construction can affect the overall size.
Cabinets, Bookcases and Dressers
Include projecting cornices, plinths, handles and decorative mouldings. If the piece separates into sections, record both the overall dimensions and the size of the largest individual section.
Tables
Record the overall length, width and height. For extending or drop-leaf tables, measure both the closed and fully extended sizes where possible.
Chairs and Armchairs
Measure the overall width across the widest part of the frame or arms, the total depth and the full height. Seat height and seat width can also be useful when comparing comfort and proportions.
Mirrors and Framed Artwork
Measure the complete outer frame rather than only the visible mirror glass, print or painting. Large decorative frames can add considerably to the overall size.
Furniture Measurement Calculator – Frequently Asked Questions
How should furniture dimensions be written?
Furniture dimensions are commonly given as width × depth × height, although the order can vary between sellers. Always check what each figure represents rather than relying on the order alone.
How many centimetres are in an inch?
One inch equals 2.54 centimetres.
How many millimetres are in a centimetre?
There are 10 millimetres in one centimetre.
How many centimetres are in a metre?
There are 100 centimetres in one metre.
How many inches are in a foot?
There are 12 inches in one foot.
Can furniture wider than a doorway still fit through?
Sometimes. A piece may be able to pass through a doorway by turning or tilting it so that a smaller dimension passes through the opening.
Whether this is possible depends on the shape of the furniture, the doorway dimensions and the amount of space available for manoeuvring on both sides of the opening.
Should I measure the door or the door frame?
Measure the actual clear opening available when the door is fully open. Hinges, handles, stops and other parts of the frame can reduce the usable width.
Should I allow extra clearance?
Yes. A measurement that is exactly the same size as the available opening leaves no practical tolerance. Small variations in measuring, projecting details or restricted movement can prevent the item from fitting safely.
How do I check if furniture will fit in my room?
Measure both the furniture and the usable floor space within the room. Remember to allow space for doors, drawers and cupboards to open and for people to move comfortably around the piece.
You can use our Furniture Room Fit & Clearance Calculator for a more detailed comparison.
How do I know whether furniture will fit in my vehicle?
Measure both the vehicle’s internal loading space and the smallest loading-door opening. The opening is often more restrictive than the space available inside the vehicle.
Also allow for wheel arches, seats, roof shape and anything else that reduces usable space.
Can I use this calculator before buying furniture online?
Yes. Converting the seller’s measurements into units you normally use and comparing them with your room, doorway and vehicle dimensions can help identify possible problems before purchasing.
Related Furniture Tools
These free Holytown Antiques tools can help with planning furniture, artwork and interiors.
Furniture Room Fit & Clearance Calculator
Compare furniture dimensions with your room and estimate the remaining clearance and floor-space use before buying.
Picture & Mirror Hanging Calculator
Calculate hanging height, picture spacing and positioning for mirrors and artwork, including pieces displayed above furniture.
Upholstery Fabric Calculator
Estimate the amount of fabric required for chairs, stools, benches, armchairs and sofas, including allowances for pattern matching and contingency.
Browse Furniture at Holytown Antiques
Browse our current selection of antique, vintage and distinctive pre-owned furniture.
Important Information
The Furniture Measurement Calculator is provided as a general planning and measurement tool.
Doorway, vehicle and room-fit results should be treated as an initial guide rather than a guarantee that a piece of furniture can be safely moved through a particular route or positioned in a specific space.
Furniture shape, removable parts, projecting mouldings, door frames, staircases, corners, bannisters, ceiling height and the amount of available manoeuvring space can all affect whether an item will physically fit.
Always take your own measurements carefully before purchasing, collecting or arranging delivery of furniture. For large, heavy or valuable pieces, consider obtaining advice from an experienced furniture mover where necessary.
Please note: Measurements and calculations provided by this tool are for general guidance only. Holytown Antiques cannot guarantee that an item will fit through a doorway, into a vehicle or within a particular room based solely on the calculator result.