Propeller Thrust Coefficient KT

Non-dimensional thrust KT = T / (ρ·n²·D⁴). The vertical-axis quantity read from open-water propeller charts.

Propulsion

Loading calculator…

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

K_T = \frac{T}{\rho \cdot n^2 \cdot D^4}

Symbol	Meaning	Unit
$T$	Thrust	N (input as kN)
$ρ$	Sea-water density	kg/m³
$n$	Shaft revolutions per second	rev/s
$D$	Propeller diameter	m
$KT$	Thrust coefficient

Source: Carlton - Marine Propellers and Propulsion

Non-dimensional thrust KT = T / (\u03c1\u00b7n\u00b2\u00b7D\u2074).