Thickness & Size · Practical Reference
How Much Does Plywood Weigh?
Plywood weight depends on both thickness and species — useful to know before you plan how many sheets one person can lift, or how much load a wall-mounted panel needs to support.
| Thickness | Approx. Weight (8x4 ft sheet) |
|---|---|
| 6mm | Roughly 9–13 kg, depending on species |
| 9mm | Roughly 14–19 kg |
| 12mm | Roughly 19–26 kg |
| 18mm | Roughly 28–39 kg |
| 25mm | Roughly 38–51 kg |
Figures are approximate — actual weight varies by species density, moisture content and manufacturer.
Three Factors Beyond Thickness
Wood Species
Denser hardwood species like gurjan weigh noticeably more than lighter softwood species at the same thickness.
Moisture Content
Damp conditions can increase a sheet's weight by roughly 5–10%, which is worth accounting for if sheets have been stored in a humid space.
Load Capacity Scales With Thickness
Thicker sheets don't just weigh more — they also carry meaningfully more load, which is why a heavier sheet is often the right trade-off for structural applications.
Planning for a Project
For a multi-sheet project, multiply the per-sheet estimate by your sheet count to plan transport and handling, and remember that thicker sheets need two people to move safely without risking a strained back or a damaged edge. See our hardwood vs softwood plywood guide for how species affects both weight and strength, and our flush door thickness guide for thickness selection in a specific application.
Frequently Asked Questions
How much does an 18mm plywood sheet weigh?
An 8x4 ft sheet of 18mm plywood typically weighs roughly 28 to 39 kg, depending on the wood species used.
Does hardwood plywood weigh more than softwood plywood?
Yes — hardwood species are denser, so hardwood plywood weighs noticeably more than softwood plywood at the same thickness.
Does moisture affect plywood weight?
Yes — plywood stored in damp conditions can absorb enough moisture to increase its weight by roughly 5 to 10%.
How much weight can plywood support?
Load capacity increases significantly with thickness — thin sheets (6mm) suit light-duty use, while thicker sheets (18mm and up) are used where real structural load-bearing is needed.
Do I need two people to carry a full plywood sheet?
For thicker sheets (18mm and above) especially, yes — a full 8x4 ft sheet at that thickness is heavy and awkward enough that two people moving it safely is the sensible approach.
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