Calculate Volume in Cubic Metres (m³)
Use this CBM calculator to quickly find volume for boxes, tanks, rooms, and shipping loads. Enter dimensions, choose a shape and unit, then click calculate.
What is a cubic metre?
A cubic metre (m³) is a unit of volume. It represents the space inside a cube that is 1 metre long, 1 metre wide, and 1 metre high. In daily life, cubic metres are commonly used for:
- Shipping and freight volume (CBM)
- Storage and warehouse planning
- Construction material estimation
- Tank, room, and container capacity
How this cubic meter calculator works
This volume calculator converts your dimensions into metres first, then applies the shape formula. That makes the result consistent and accurate in cubic metres regardless of whether your input is in cm, mm, ft, in, or yd.
Formulas used
- Rectangular prism: Volume = Length × Width × Height
- Cylinder: Volume = π × Radius² × Height
- Triangular prism: Volume = 0.5 × Base × Triangle Height × Length
- Sphere: Volume = (4/3) × π × Radius³
Step-by-step: calculating cubic metres manually
1) Measure dimensions
Measure all required dimensions carefully. Use the same unit for each measurement.
2) Convert to metres
If your measurements are not in metres, convert them:
- 1 cm = 0.01 m
- 1 mm = 0.001 m
- 1 ft = 0.3048 m
- 1 in = 0.0254 m
- 1 yd = 0.9144 m
3) Apply the shape formula
Multiply values according to the correct formula for your object shape.
4) Multiply by quantity
If you have multiple identical items, multiply the single-item volume by the number of items.
Examples
Example 1: Box
A box is 2.4 m × 1.2 m × 0.8 m.
Volume = 2.4 × 1.2 × 0.8 = 2.304 m³.
Example 2: Shipping carton in cm
A carton is 60 cm × 40 cm × 35 cm.
Convert to metres: 0.6 × 0.4 × 0.35 = 0.084 m³.
Example 3: Cylinder tank
Radius = 0.5 m, height = 2 m.
Volume = π × 0.5² × 2 ≈ 1.571 m³.
Why CBM matters in logistics
In freight and courier pricing, volume often matters as much as weight. Carriers use cubic metres (CBM) or volumetric weight to estimate how much vehicle or container space your cargo occupies. Better CBM estimates help you:
- Compare shipping quotes more accurately
- Avoid underestimating container needs
- Reduce repacking and warehouse planning errors
Common mistakes to avoid
- Mixing units (for example, using cm for one side and m for another)
- Entering diameter when the formula needs radius
- Forgetting to multiply by quantity
- Rounding too early on small dimensions
Quick reference conversions
- 1 m³ = 1,000 liters
- 1 m³ ≈ 35.3147 ft³
- 1 m³ ≈ 1.30795 yd³
Final thoughts
A reliable cubic metre calculator saves time and prevents expensive estimation errors. Whether you are planning a move, quoting freight, sizing storage, or estimating concrete and fill, calculating volume correctly in m³ is the right starting point.