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Material quantity calculator

Build up a wall, roof or floor from its material layers, give the area it covers, and get the volume and mass of each material — a quick bill of quantities for ordering materials or checking structural loading. Uses the same material list as the U-Value Calculator, so a construction built there can be imported here directly.

Volume = Area × thickness Mass = Volume × density Free, no sign-up

Construction

Inputs only — every result is on the right.

Already built this construction in the U-Value Calculator? Import it instead of re-entering it.

Layers interior → exterior, in order

Waiting for input
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Total mass of this construction.

Total volume
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Mass per m²
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Link copied — it reopens with these exact inputs.

How to use this calculator

  1. Enter the area the construction covers.
  2. Add each material layer with its thickness — or import a construction already built in the U-Value Calculator.
  3. Read the volume and mass of each layer, and the totals.

What this calculates

Given the area a construction covers, each layer's volume follows directly from its thickness, and its mass from that volume and the material's bulk density:

Volume_layer = Area × thickness [m³] Mass_layer = Volume_layer × density [kg]

This is exact arithmetic once the area, thickness and density are known — the only "typical/representative" figure is the material density lookup table (EN 12524-tier, the same reference tier as the U-Value Calculator's own conductivity and vapour resistance tables), not a certified figure for any specific product batch. Use "Custom" with a manufacturer's data-sheet value for a real order.

Mass per m² is a useful cross-check against a roof or floor's structural load capacity; total mass and volume are what you'd take to a supplier for a quote or delivery booking.

Density values are typical/representative bulk density (EN 12524-tier), not a certified figure for any specific product batch — a real product can vary meaningfully by manufacturer and format (e.g. mineral wool density varies a lot between loose fill, standard batts and rigid slabs). Use "Custom" with a manufacturer's tested value for a real order or structural check. This calculator does not add waste/offcut allowance, packaging, or delivery-unit rounding — it reports the exact theoretical quantity for the area entered.