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MDF thickness, size and weight: the quick answer
CUZI supplies standard plain MDF in 2.5–35 mm and MR/FR MDF in 9–25 mm. Regular sheet sizes are 1220 × 2440 mm and 2100 × 2800 mm. Choose the service grade and component thickness first, then compare cutting yield, fit and handling weight.
Calculate bare-board weight as length × width × thickness in metres × density in kg/m³. A 1220 × 2440 × 18 mm sheet calculates to 37.51 kg at an assumed 700 kg/m³. The available 12 mm RAW MDF report records 755 kg/m³; use the data for your selected board when placing an order.
To connect density with your machining and finish, read how MDF is made and which quality questions to ask. Keep the proposed board, measurement basis, finished dimensions and item-linked records with the component trial.
Choose MDF grade and thickness for the component
Specify the board type beside the thickness: plain MDF for dry-interior work, MR/HMR for the stated humid-interior use, and FR for a specified fire requirement. For decorative MDF, distinguish the substrate gauge from the completed faced-board thickness.
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| Board route | Thickness / construction | Include in the request |
|---|---|---|
| Standard plain MDF | 2.5–35 mm; E0 / E1 / E2 emission options. | Dry-interior use, thickness, size, machining and finish. |
| Moisture-resistant MDF | 9–25 mm; E0 / E1 emission options. | Humid-interior application, board requirement and complete finished detail. |
| Fire-retardant MDF | 9–25 mm; E0 / E1 emission options. | Required fire standard, class, construction and supporting documents. |
| Lightweight / ultralight MDF | Thickness, density and emission specification agreed for the project. | Target board or finished-part mass, dimensions, fittings and working trial. |
| HPL faced MDF | 12–25 mm finished board; 0.5–2 mm HPL; single- or double-sided. | Finished thickness, HPL, reverse, edging and substrate grade. |
| Melamine / PVC faced MDF | Finished thickness and substrate specified with the facing arrangement. | Decor / film, front and reverse, finished dimensions and matching edge. |
Select thickness by the joint, profile and support arrangement
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| Component | Dimension that decides the choice | What to put on the drawing |
|---|---|---|
| Cabinet back in a groove | Completed insert thickness and available groove clearance. | Groove range, panel range, inserted depth and attachment. |
| Routed cabinet door | Remaining material beneath the deepest profile and at the hinge. | Finished overall thickness, deepest cut, hinge recess and finish build-up. |
| Shelf or loaded panel | Designed span, support, load and acceptable deflection. | Support layout and required stiffness/strength for the proposed board. |
| HPL or other faced panel | Total thickness after substrate, adhesive, front and reverse. | Each layer plus the finished tolerance at joints and fittings. |
Thin MDF requests should identify the backing, frame, groove or support arrangement. A 3 mm panel cut for a cabinet back and a thin panel bonded to another part have different fit and assembly questions. The plain MDF buying route helps turn those details into a trial request.
Trial the proposed board through the operation that matters: routing and painting for a door, fitting and assembly for a cabinet, or bonding and calibration for a faced component. Use the MDF routed-door guide and shelf design brief to prepare that comparison.
Convert inches without changing the fit requirement.
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| Metric input | Inches, rounded | Buying consequence |
|---|---|---|
| 12 mm | 0.4724 in | Use the actual gauge and fit allowance for the groove or fitting. |
| 18 mm | 0.7087 in | An exact ¾ in input is 19.05 mm; specify which your drawing requires. |
| 25 mm | 0.9843 in | An exact 1 in input is 25.40 mm; quote the required nominal gauge and tolerance. |
Convert inches using 25.4 mm per inch, then compare the drawing with the offered nominal thickness and finished tolerance. Try the panel in the joint or fitting before choosing the production size.
Compare sheet sizes, cutting layout and machine capacity
Choose the format that yields your required parts after trim, kerf and decor direction are included. Check that the saw, CNC bed, lifting equipment and storage rack can receive it. A larger sheet earns its extra handling only when the cutting layout or part length uses the space.
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| Sheet format | Supply route | Area per sheet |
|---|---|---|
| 1220 × 2440 mm | Regular | 2.9768 m² |
| 2100 × 2800 mm | Regular | 5.8800 m² |
| 1220 × 3050 mm | On request | 3.7210 m² |
| 1830 × 3660 mm | On request | 6.6978 m² |
| 1220 × 3660 mm | On request | 4.4652 m² |
Purchased sheet area and net part area are different quantities. Record useful parts, recoverable offcuts and reserve from the actual layout, then compare the delivered cost and workshop time. Our cut-to-size panel guide includes a fixed-layout comparison and a drawing-based request route.
Specify raw-board and finished-part tolerances
Write nominal size and tolerance separately. Measure the stage that controls fit: raw substrate, calibrated faced board or completed part. Include length, width, squareness and critical grooves, holes or profiles on the component drawing.
Send the drawing and required tolerances through the cut-to-size panel route or MDF machining route. For a complete material, finish and processing brief, use custom panel supply. Include the selected board and finish with the dimensions your component requires.
What MDF density means and how to calculate it
For a choice between MDF and a specified HDF, use the MDF vs HDF component guide to compare the actual profile, fitting, finish and finished-weight target.
Density in kg/m³ tells you how much a stated volume of board weighs. For a quotation, ask whether the number is a target, a stated range or a measured result, and identify the board type, thickness and measurement conditions. That makes comparisons between standard and lighter constructions more useful.
The European Panel Federation's MDF property guidance explains density measurement under EN 323 and treats density, internal bond, screw holding and bending as separate properties. Compare the required properties for your component alongside the mass.
- Density
- Board mass ÷ board volume, expressed in kg/m³.
- Nominal volume
- Sheet length × width × nominal thickness, with all dimensions in metres.
- Estimated board mass
- Nominal volume × the density used in the calculation, expressed in kg.
Request the data for the proposed grade and thickness when machining, edge fittings or sustained loading drive the decision. The Composite Panel Association's MDF overview describes a range of MDF properties and dimensions for furniture, machining and decorative surfacing.
Use measured mass and dimensions for a density check.
With mass in grams and dimensions in millimetres, density in kg/m³ equals mass × 1,000,000 ÷ (length × width × thickness). For arithmetic, a 50 × 50 × 18 mm piece weighing 31.50 g gives 700 kg/m³; at 32.40 g with those same dimensions it gives 720 kg/m³. These inputs explain the calculation, not measured CUZI results or a laboratory procedure.
Use the relevant method and conditions for a report, including how specimens and measurements are selected. Keep instrument precision, measured dimensions and material identity with a workshop check, and distinguish it from the supplier’s target or a stated average. A measured 755 kg/m³ is equivalent to 0.755 g/cm³.
12 mm RAW MDF: measured properties and what they mean
CUZI's RAW MDF report identifies interior MDF for dry conditions at nominal 1220 × 2440 × 12 mm. Compare the nine results below with the material your component needs.
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| Property | Recorded result | Method |
|---|---|---|
| Measured dimensions | 2441 × 1221 × 12.08 mm · length × width × thickness | EN 324-1 |
| Density | 755 kg/m³ | EN 323 |
| Density variation within a panel | +2.8 % | EN 323 |
| Thickness swelling after 24 h | 8.6 % | EN 317 |
| Bending strength (MOR) | 29.8 N/mm² | EN 310 |
| Modulus of elasticity (MOE) | 3180 N/mm² | EN 310 |
| Internal bond strength | 0.82 N/mm² | EN 319 |
| Moisture content | 6.7 % | EN 322 |
| Formaldehyde emission | 0.038 mg/m³ | EN 717-1 |
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| Reported property | Meaning for a furniture buyer | Use alongside |
|---|---|---|
| Density: 755 kg/m³ | A mass-per-volume result for this 12 mm interior MDF. | The actual dimensions when calculating this board’s mass. |
| MOR: 29.8 N/mm²; MOE: 3180 N/mm² | MOR describes bending strength; MOE describes bending stiffness in the reported test. | The shelf or component’s span, load and support design. |
| Internal bond: 0.82 N/mm² | A through-thickness tensile result for the tested board. | Profile, lamination and fitting trials relevant to the part. |
| Moisture: 6.7%; 24 h swelling: 8.6% | Moisture content and thickness change after the stated water test are different measurements. | The chosen service grade, storage conditions and complete edge/finish detail. |
Report issuer: Nanjing Customs District Industrial Products Inspection Center. Product references: EN 622-1:2003 / EN 622-5:2009.
Use the stated dimension basis when planning weight.
The nominal sheet dimensions and the measured dimensions give two volume bases. Multiply length × width × thickness in metres by the reported 755 kg/m³ density to calculate bare-board mass.
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| Dimension basis | Dimensions used | Calculated mass |
|---|---|---|
| Nominal sheet | 1220 × 2440 × 12 mm | 26.97 kg |
| Reported measurements | 2441 × 1221 × 12.08 mm | 27.18 kg |
These calculations estimate bare-board mass from the stated inputs. For freight and lifting, request measured sheet weights, sheets per pack, external bundle dimensions and gross packing weights for the proposed order. Keep the density and dimension basis with each calculation when comparing a different thickness, grade or faced construction.
Connect the values with the part you will make.
Machining and assembly: carry density, density variation and internal bond into the material discussion, then trial the deepest profile, edge and actual fitting. The reported MOR and MOE give your technical team named bending properties to read alongside the component's span, support and loading brief.
Moisture and finish: retain the 6.7% moisture reading under EN 322 and 8.6% thickness swelling after 24 h under EN 317 with the reported board. For a humid-interior component, use the standard and MR MDF report comparison to organise the selected grade, moisture assessment and full edge/finish detail.
Emission and order data: retain the 0.038 mg/m³ result with EN 717-1, then specify your required emission option and destination file. Compare the RAW, standard and HMR MDF emission reports and request data for 18 mm plain MDF when preparing that item.
Moisture readings, storage and receiving
The RAW MDF report records 6.7% moisture content by EN 322. For your order, discuss the required moisture range and checking method for the offered board. Record transport, receiving and workshop conditions when comparing readings or investigating dimensional changes.
Moisture content describes moisture in the board; a moisture-resistant designation describes a board selected for the corresponding service conditions. Keep the measurement, board type and application together when preparing an inquiry.
At receiving, match pack labels and item references, inspect condition, and follow the agreed plan for dimensional and moisture checks. Support and protect the boards during storage and plan conditioning before machining. Our panel storage guide and incoming inspection checklist help organise that work.
MDF sheet weight table: 6, 12, 18 and 25 mm
Multiply 1.22 × 2.44 × 0.018 to obtain 0.0535824 m³. Then multiply that volume by the density of the board you are buying. At an assumed 700 kg/m³, the calculated board mass is 37.51 kg per sheet.
Calculation example: 700 kg/m³ is a chosen planning assumption, rather than a CUZI density specification or a measured 18 mm sheet weight. Use the quoted density for your order.
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| Nominal item | Volume per sheet | Calculated mass |
|---|---|---|
| 1220 × 2440 × 18 mm | 0.0535824 m³ | 37.51 kg per sheet |
| 2100 × 2800 × 18 mm | 0.1058400 m³ | 74.09 kg per sheet |
| 100 sheets, 1220 × 2440 × 18 mm | 5.35824 m³ total | 3750.77 kg total, before rounding individual sheets |
Use the unrounded inputs for a total, then round the final result. Add facings, adhesive, edges or fittings when estimating a completed component. For shipment planning, obtain the bundle count, external dimensions, packing and confirmed gross weight.
Compare thickness changes at the same planning density.
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| Nominal thickness input | Nominal volume | Bare-board mass |
|---|---|---|
| 6 mm | 0.0178608 m³ | 12.50 kg |
| 12 mm | 0.0357216 m³ | 25.01 kg |
| 18 mm | 0.0535824 m³ | 37.51 kg |
| 25 mm | 0.0744200 m³ | 52.09 kg |
The table uses 700 kg/m³ for calculation. Recalculate with the density and dimensions of your chosen board. At that input, a 2100 × 2800 × 18 mm sheet weighs 74.09 kg before facing or packing, so include handling as well as cutting area in your choice.
Set a finished-part weight target for lightweight MDF
When handling or finished-part weight matters, send a target mass with the drawing. CUZI supplies lightweight and ultralight MDF with thickness, density and emission requirements agreed for the project. Ask for the proposed construction and density range, then calculate the part using its actual volume.
At the same bare-board volume, calculated mass changes in direct proportion to the density used. A finished door also contains its facing, coating, edges and fittings. Keep those additions in the comparison, and trial the selected hinge, connector or routed profile with each proposed board.
Use the lightweight MDF buying route to compare the handling benefit with machining, finish and assembly requirements. Send the target board mass or completed-part mass, clearly identifying which one your team needs.
Budget the complete part before setting a density target.
For a 900 × 450 × 18 mm rectangular part, bare volume is 0.00729 m³. If your completed-part limit is 6 kg and the stated non-board materials add 1.2 kg, the remaining board budget is 4.8 kg. Dividing that budget by the volume gives a planning density ceiling of about 658 kg/m³.
Use the calculation to set a weight target, then add facings, edging, adhesive, coatings and hardware and allow for machining. Weigh the finished sample and check the fitting and finish before selecting the board.
Turn your finished-weight limit into a board inquiry.
Enter a rectangular bare-board blank and the maximum completed-part weight. Include the total mass of facings, adhesive, edges and fittings separately. For routed or shaped parts, use this full-blank estimate to start, then check the actual machined and finished component.
Use the calculated ceiling with the offered board’s density range and actual dimensions. Keep machining, hinge or connector performance, finished appearance and emission requirements in the same comparison. Confirm the completed mass through your working component trial.
Prepare an MDF size and weight inquiry
A useful first request names the board type, nominal thickness, sheet size, quantity and destination. Add the finished-part drawing, machining and facing details, required tolerances, density or mass target, and material documents where they affect your selection.
Start with 18 mm standard MDF in 1220 × 2440 mm below, or choose the larger regular format above. The request carries the thickness and sheet format into the form; you can edit them there. For samples, specify a practical cut size and the operation you want to trial from the proposed sheet.
The minimum order is one container; mixed loads are available. Regular production takes 7–15 days, followed by sea transport. Request FOB Qingdao / Lianyungang or CIF to your destination port. Samples are free; courier freight is credited in full against your formal order.
For several grades, thicknesses or finishes, use a separate item line for each in the mixed-panel schedule. The wholesale MDF guide connects your item list, packs and destination into a container inquiry.
MDF density, thickness and size questions.
Can I download CUZI's MDF density and strength report?
Yes. The RAW MDF report results include density of 755 kg/m³ under EN 323, MOR of 29.8 N/mm² and MOE of 3180 N/mm² under EN 310, together with dimensional, moisture, swelling, internal-bond and emission measurements. Open the full PDF and request the board data for your selected grade, thickness and format.
What MDF thicknesses does CUZI supply?
Standard plain MDF is available in 2.5–35 mm. MR and FR MDF are available in 9–25 mm. HPL faced MDF has a 12–25 mm finished-board range. Lightweight and other faced constructions follow the requirements agreed in the quotation.
What are the regular MDF sheet sizes?
1220 × 2440 mm and 2100 × 2800 mm are regular MDF formats. 1220 × 3050 mm, 1830 × 3660 mm and 1220 × 3660 mm are available on request. Include the board type, thickness and facing with the format you need.
What density should I use to calculate MDF weight?
Use the quoted density for the selected board, or a clearly named planning assumption while comparing options. Multiply length × width × thickness in metres by density in kg/m³. The RAW MDF report records 755 kg/m³ for its stated construction; request the offered item's data for your purchase.
How heavy is an 18 mm MDF sheet?
A nominal 1220 × 2440 × 18 mm sheet has a volume of 0.0535824 m³. At the illustrative assumption of 700 kg/m³, its calculated bare-board mass is 37.51 kg. Recalculate with the density of your selected board and add any facing or component materials.
Does higher density mean a better furniture board?
No. Density is one property, and higher density does not guarantee a better result for every furniture component. Compare the properties your part requires: machining, internal bond, bending, fitting performance, dimensional control and finished appearance. Review the density alongside those properties and the finished-part trial.
Is 18 mm the substrate or the finished faced-board thickness?
An 18 mm requirement must identify either the MDF core or the total finished panel; they are different dimensions. State which dimension you need in the inquiry. For HPL, melamine or PVC faced boards, include the substrate, facing, reverse and final overall thickness so the supplied board fits the component.
Can I compare moisture readings from receiving and machining?
Yes, when the board identity, method, calibration and measuring conditions are recorded consistently. Keep the measurement method, board identity and conditions with each reading. Use the agreed receiving and conditioning plan when reviewing any change alongside dimensional measurements.
Can I mix MDF sizes and thicknesses in a container?
Yes. CUZI's minimum order is one container and mixed loads are available. Send separate quantities and specifications for each item, with packing requirements and the named FOB or CIF port, to prepare the load and quotation.
