▽ +09.00Engineering Hub · Calculator

Thermal insulation board calculator

Work out how many insulation boards (XPS or EPS) you need and their volume from the area, board size, thickness and waste — and the thermal resistance if you enter the conductivity.

Inputs

The values shown are an illustrative example, not product data; replace them with your project values and the approved TDS.

Area

m²

The net area to be treated, without waste.

Board length

From the TDS of the approved product.

Board width

From the TDS of the approved product.

Thickness

From the thermal design and specification.

Waste

An allowance for cuts, overlaps, details and site losses.

Thermal conductivity λ (optional)

W/m·K

The declared value in the TDS; used for the thermal resistance.

Boards per pack (optional)

From the supply data.

Boards with waste560 boards

Results

Result of the example values

Board area: 0.750 m²
Boards for the net area: 533.3
Boards with waste: 560 boards
Net volume: 20.00 m³
Volume supplied: 21.00 m³
Layer thermal resistance R: m²·K/W
Packs: packs

Estimate only — final quantities depend on the approved specification, the product TDS and a site survey. No prices are given.

Send with a quotation request

+01.00Formulas

How it is calculated

Board area (m²) = length (mm) × width (mm) ÷ 1,000,000
Boards = round up [ area × (1 + waste %) ÷ board area ]
Volume (m³) = area × thickness (mm) ÷ 1000 · R = thickness (m) ÷ λ

QQuestions

Questions clients ask

How many insulation boards do I need?

Divide the area by one board’s area and add cutting waste around edges and penetrations. The thickness is set by the U-value the design requires under the Saudi Building Code.