MDF vs Particle Board vs Plywood: Weight, Strength, and Cost Per Sheet Compared

MDF, particle board, and plywood dominate the sheet goods section at every lumber yard, and they look similar enough that inexperienced buyers treat them as interchangeable. They are not. The differences in weight, strength, moisture behavior, and machinability make each material significantly better suited to some applications and significantly worse for others.

Our calculators handle weight for each: MDF weight calculator, , and . This guide covers the comparison.

What each material is made of

MDF (Medium Density Fiberboard) is made by breaking down wood into individual fibers, combining them with wax and resin binders, and pressing them under high heat into dense, uniform panels. The fibers are completely homogenous — no grain direction, no voids, completely consistent throughout.

Particle board (also called chipboard or flakeboard) uses coarser wood particles and chips — not fine fibers — combined with adhesive and pressed into panels. It is less expensive and less dense than MDF but also less strong.

Plywood is made from thin wood veneers glued with alternating grain directions. The cross-grain construction gives it strength in both directions and makes it more resistant to splitting and moisture than the engineered panel products.

Weight comparison

Material	Density (lbs/ft³)	3/4" 4x8 sheet	1/2" 4x8 sheet
Particle board	44-50	~84 lbs	~56 lbs
MDF	48-53	~90 lbs	~60 lbs
Softwood plywood	28-35	~61 lbs	~41 lbs
Baltic birch plywood	40-44	~75 lbs	~50 lbs

MDF and particle board are dramatically heavier than structural softwood plywood — roughly 40-50% heavier per sheet. This matters enormously in cabinet construction, where a full kitchen of MDF carcasses can add hundreds of pounds over plywood, stressing both the installation structure and the installer's back.

Strength comparison

Property	Particle board	MDF	Plywood
Bending strength	Poor	Moderate	Good
Screw holding (face)	Poor	Good	Very good
Screw holding (edge)	Very poor	Poor	Good
Shelf sag resistance	Poor	Moderate	Good
Impact resistance	Poor	Poor	Good
Shear strength	Moderate	Moderate	Very good

Particle board's major weakness is screw holding, especially at edges. Screws in particle board edges strip easily and the material can crumble under repeated fastening. IKEA and most flat-pack furniture use particle board with cam locks and specialized fasteners precisely because traditional screws fail in it.

Moisture resistance

Exposure	Particle board	MDF	Plywood
Brief moisture exposure	Swells, may not recover	Swells edges, may recover	Can delaminate but often recovers
Sustained moisture	Permanent damage, falls apart	Permanent swelling, weakening	Degrades but more slowly
Humidity variation	Prone to swelling	Relatively stable	Most stable
Outdoor use	Never	Never (except marine MDF)	Exterior grade only

Neither MDF nor particle board belongs in areas with any moisture exposure — bathrooms, kitchens with plumbing access panels, garages. The one exception is specifically moisture-resistant MDF (often marketed as "MR MDF" or "green core MDF") which handles incidental moisture but still should not be used outdoors or in wet areas.

Machinability: where MDF shines

MDF's homogeneous structure makes it ideal for routing, cutting, and painting:

• Router profiles: MDF produces perfectly smooth, crisp routed profiles with no grain tear-out. It is the preferred substrate for painted crown molding, raised panel doors, and decorative router work.
• CNC machining: Consistent density makes MDF highly predictable for CNC operations. Most CNC-cut cabinet parts and decorative panels are MDF.
• Paint finish: MDF takes paint extremely well and produces glass-smooth painted surfaces. Plywood grain telegraphs through paint; MDF does not.
• Edge treatment: MDF edges are smooth and can be sanded and painted, though they need to be sealed first (they absorb paint like a sponge otherwise).

Cost comparison (approximate, varies by region)

Material	3/4" 4x8 sheet approx.	Relative cost
Particle board	$18-28	Cheapest
MDF	$32-48	Mid-range
Softwood plywood (construction)	$45-70	Higher
Birch plywood (shop grade)	$60-90	Higher
Baltic birch (furniture grade)	$80-120	Premium

The right material for each application

Application	Best choice	Why
Cabinet carcasses (painted)	MDF	Smooth surface, stable, takes paint perfectly
Cabinet carcasses (wood grain)	Baltic birch plywood	Screw holding, light weight, attractive edge
IKEA-style flat pack furniture	Particle board	Cost; specialized cam fasteners compensate for weakness
Painted raised panel doors	MDF	No grain, crisp profiles, no seasonal movement
Shelving (heavy loads)	Plywood	Sag resistance; MDF sags significantly under sustained load
Speaker cabinets	MDF	Dense, acoustically inert, no resonance
Subfloor	Plywood only	Structural; neither MDF nor particle board is appropriate
Painted baseboards and trim	MDF	Pre-primed MDF trim takes paint better than wood

Calculate weight for your specific project using the dedicated calculators: MDF, , and  — each uses the correct density for accurate results.