Admiralty Coefficient Power

Quick-look delivered power from displacement, speed and a ship-type Admiralty coefficient. Useful for early-design sizing, sister-ship benchmarking, and power-limitation sanity checks.

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

P_D = \frac{\Delta^{2/3} \cdot V^3}{C}

Symbol	Meaning	Unit
$P_D$	Delivered power at the propeller	kW
$\Delta$	Displacement at design draft	t
$V$	Service speed	kn
$C$	Admiralty coefficient (P in kW, $\Delta$ in t, V in kn) - tanker/bulker 400–490, container 560–700, Ro-Pax 520–620, cruise 480–580

Source: Molland, Turnock & Hudson - *Ship Resistance and Propulsion* (Cambridge); Bertram - *Practical Ship Hydrodynamics* (Elsevier)

In short

Quick-look delivered power from displacement, speed and an Admiralty coefficient. Early-design and sister-ship benchmarking.

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