Sheet Material Weight Calculator

Multiply length, width and thickness (converted to metres) to get the volume in cubic metres, then multiply by the material's density in kilograms per cubic metre. For a 2440mm x 1220mm x 18mm sheet of MDF at 750 kg/m³, that is 2.440 x 1.220 x 0.018 x 750 = 40.2 kg. Multiply by the number of sheets for an order total.

Mild/carbon steel is calculated at 7850 kg/m³ in this tool, which matches the figure published by steel suppliers steelexpress.co.uk and aalco.co.uk on their own weight calculators. Stainless steel (304-class, the most common commercial grade) is denser at roughly 8000 kg/m³.

MDF is calculated here at 750 kg/m³ and plywood at 600 kg/m³ - MDF is roughly 25% denser than the plywood default, because plywood is layered wood veneer with air-filled grain structure while MDF is compressed wood fibre bonded with resin. A same-size, same-thickness sheet of MDF weighs noticeably more: a 2440 x 1220 x 18mm sheet is 40.2 kg in MDF against 32.1 kg in plywood at this tool's default densities.

At the standard 2440mm x 1220mm size and 750 kg/m³ density, an 18mm MDF sheet weighs 40.2 kg. Halve the sheet to 1220 x 610mm and the weight halves too, to roughly 10.0 kg, since weight scales directly with area at a fixed thickness and density.

A full 2440 x 1220mm sheet of 18mm plywood at this tool's 600 kg/m³ default weighs about 32.1 kg. Because real plywood density ranges roughly 500-700 kg/m³ depending on species, ply count and glue line, enter your supplier's exact figure in the Density field if you have it for a more precise number.

A 4ft x 8ft sheet is 1220mm x 2440mm. At 3mm thickness and 7850 kg/m³ density, that sheet weighs about 70.1 kg; at 6mm it roughly doubles to 140.2 kg, since weight is directly proportional to thickness at a fixed area and density.

Yes - select Aluminium (2700 kg/m³ default) or Stainless Steel (8000 kg/m³ default) from the Material Type list and the same length x width x thickness x density formula applies. Aluminium is roughly a third the density of steel, so an aluminium sheet of identical dimensions to a steel one weighs about a third as much.

Yes. Glass is calculated at 2500 kg/m³, matching the standard glazing-trade rule of 2.5 kg per m² per mm of thickness. Acrylic (Plexiglass/PMMA) is calculated at 1190 kg/m³ - roughly half the density of glass, which is one reason acrylic glazing is marketed as a lightweight alternative to glass in the same nominal thickness.

Three common reasons: your supplier's actual density differs from the category default (use the Density override field if you have a datasheet figure), the sheet has a coating or finish that adds weight (galvanising typically adds roughly 275-600 g/m² depending on coating class), or the actual thickness is slightly off nominal due to normal manufacturing tolerance. See Method and limits for the full list of what this tool does not model.

Yes, and this calculator does not model it. Cold-rolled steel sheet is commonly produced within roughly ±0.03mm to ±0.15mm of its nominal thickness depending on gauge, under dimensional-tolerance standards such as EN 10051, and board products like MDF and plywood can vary by a similar margin. Treat the result as a planning estimate, not a certified weight.

Set the Quantity field to the number of sheets you are ordering; the total weight scales linearly, so 20 sheets of 18mm MDF at the default density come to roughly 803.7 kg. This does not include pallet, banding or packaging weight - check with your supplier for their pallet tare weight if you are working to a strict vehicle payload limit.

Weight per m² (thickness in metres x density) is the areal density figure suppliers often quote directly - glass, for example, is commonly sold on the rule of 2.5 kg per m² per mm of thickness. Total weight multiplies that figure by your actual sheet area and the number of sheets, which is the number you need for delivery, lifting or vehicle-loading purposes.

Yes - use the Compare Against field to pick a second material. The Scenario Analysis table shows the total weight for both materials at your entered length, width, thickness and quantity, so you can see, for example, that the same 2440 x 1220 x 18mm sheet weighs about 40.2 kg in MDF against roughly 420.6 kg in mild steel at the same nominal thickness.

No. Galvanised steel typically carries roughly 275-600 g/m² of zinc coating depending on the coating class specified, and painted, laminated or veneered board products add the finish's own weight on top of the substrate. This tool calculates the bare, uncoated material only - add your finish's published coating weight separately if precision matters for your job.

The Assessment banding uses HSE's published manual handling guidance, which cites a commonly used guideline of around 25 kg for a single person lifting close to the body at waist height. This calculator marks totals up to 25 kg "Single-Person Lift", 25-50 kg "Two-Person Lift Recommended", and above 50 kg "Mechanical Handling Recommended". It is a general guideline, not a personal risk assessment - your own capability, the lift height, and how bulky the sheet is to grip all change what is actually safe for you.

No. This is an independent, third-party estimating tool built from standard published density figures for each material category. It is not affiliated with, endorsed by, or a product of any steel, timber, glass or plastics supplier, and it does not replace a supplier's own delivery note or a manufacturer's datasheet for a weight-critical job.