Holtrop & Mennen Resistance

Empirical regression used since 1982 for early-design resistance prediction across bulker, tanker, container, general-cargo, fishing, and tug hulls. Fast, well-calibrated, and the default first pass before any CFD or model-basin test.

DesignResistance

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

R_T = \tfrac{1}{2} \rho V^2 S \left[(1+k_1) C_F + C_W\right]

Symbol	Meaning	Unit
$R_T$	Total bare-hull resistance	kN
$\rho$	Sea-water density	kg / m³
$V$	Ship speed	m / s
$S$	Wetted surface area	m²
$C_F$	ITTC-57 frictional coefficient
$1 + k_1$	Hull form factor
$C_W$	Wave-making resistance coefficient
$L$	Waterline length	m
$B$	Waterline beam	m
$T$	Draft	m
$L_R$	Length of run	m
$\nabla$	Displacement volume	m³
$C_P$	Prismatic coefficient
$c_{14}$	Stern-shape coefficient

Source: Holtrop & Mennen - *An approximate power prediction method* (1982); Holtrop - *A statistical re-analysis of resistance and propulsion data* (1984); Molland, Turnock & Hudson - *Ship Resistance and Propulsion* (Cambridge)

In short

Early-design ship resistance from the Holtrop & Mennen regression - Reynolds, Froude, friction, form factor, wave resistance, total RT in kN.

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