Converts square meters (m²) to cubic meters (m³) by multiplying area by material thickness.
How It Works
Converting m² to m³ is straightforward: multiply the area by the thickness (or depth) expressed in meters. The formula is V = S × h, where V is the volume in cubic meters, S is the area in square meters, and h is the thickness in meters.
This calculator handles unit conversion automatically — enter thickness in millimeters, centimeters, decimeters or meters and the result is always in m³. Use the quick preset buttons for common thickness values like 5 cm, 10 cm or 200 mm.
The calculation applies to any situation where you know a surface area and a perpendicular dimension: concrete slabs, plaster coats, insulation layers, gravel beds, pool volumes, and more.
Examples
Pool volume: A pool with a surface area of 32 m² and an average depth of 1.5 m has a volume of 32 × 1.5 = 48 m³ (= 48,000 liters of water).
Concrete slab: A garage floor of 24 m² with a 15 cm (0.15 m) thick slab requires 24 × 0.15 = 3.6 m³ of concrete.
Brick wall: An exterior wall measuring 12 m long × 3 m high = 36 m² with a wall thickness of 25 cm (0.25 m) gives 36 × 0.25 = 9 m³ of brickwork.
FAQ
Can you convert m² directly to m³ without thickness?
No. Square meters measure area (2D) and cubic meters measure volume (3D). You always need a third dimension — thickness, depth, or height — to calculate volume.
What thickness unit should I use?
Use whatever unit appears on your specification or drawing. The calculator converts mm, cm, dm and m to meters automatically before computing volume.
How many liters is 1 m³?
1 m³ = 1,000 liters. So if the calculator shows 2.5 m³, that equals 2,500 liters.
What if my area is not in m²?
Convert to m² first. For example, 150 cm² = 0.015 m², 5,000 mm² = 0.005 m².
See also: m³ to m² Converter
