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About

Converting a two-dimensional area (Square Meters) to a three-dimensional volume (Cubic Meters) is physically impossible without a third variable: Thickness (or Height). This calculation is a daily necessity in construction, landscaping, and shipping. For example, knowing the floor area of a room is not enough to order concrete; one must know the slab thickness.

This tool bridges the gap by requiring the thickness input. It handles the unit conversion internally, allowing you to enter the area in meters but the thickness in millimeters or centimeters (common for flooring or mulch), ensuring the final volume is accurately calculated in cubic meters (m³). Incorrectly estimating this volume can lead to costly material shortages or waste on job sites.

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Formulas

The formula extends a 2D plane into 3D space. The critical step is normalizing units so that Thickness matches the Area unit (meters).

V(m3) = A(m2) × h(m)

If height is in millimeters:

V = A × h(mm)1000

Reference Data

ApplicationTypical ThicknessArea ExampleResulting Volume
Concrete Driveway10 cm (0.1 m)50 m²5.0 m³
Garden Mulch5 cm (0.05 m)100 m²5.0 m³
Topsoil Layer15 cm (0.15 m)20 m²3.0 m³
Asphalt Paving40 mm (0.04 m)200 m²8.0 m³
Self-Leveling Compound5 mm (0.005 m)10 m²0.05 m³
Sand Bedding (Pavers)30 mm (0.03 m)60 m²1.8 m³
Gravel Base150 mm (0.15 m)40 m²6.0 m³
Floor Insulation50 mm (0.05 m)80 m²4.0 m³
Roof Insulation200 mm (0.2 m)150 m²30.0 m³

Frequently Asked Questions

No. A square meter is a flat sheet with no depth. A cubic meter is a box. You cannot calculate how much fits in the box without knowing how deep it is.
For residential patios or walkways, 10 cm (100 mm) is standard. For heavy vehicle driveways, 15 cm (150 mm) or more is recommended.
First, calculate the area of the circle (Area = π × r²). Enter that result into the "Area" field of this tool, then add your thickness.