Block Coefficient (Cb)

Ratio of displacement volume to the enclosing L·B·T block - the most-cited hull fullness indicator.

StabilityForm coefficient

Displacement volume ∇m³Waterline lengthmWaterline beammDraft Tm

Block coefficient Cb: 0.710–

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

C_B = \frac{\nabla}{L \cdot B \cdot T}

Symbol	Meaning	Unit
$\nabla$	Displacement volume	m³
$L$	Waterline length	m
$B$	Waterline beam	m
$T$	Draft	m
$C_B$	Block coefficient

Source: SNAME - PNA Vol I; Derrett & Barrass Ch.4

In short

Ratio of displacement volume to the enclosing L\u00b7B\u00b7T block - the most-cited hull fullness indicator.

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