// multi-utility computation suite · offline · instant · precise
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eng.ship-rolling-period Calculator
Calculates the natural rolling period from GM and radius of gyration — the fundamental parameter for sea-keeping comfort. Rolling period T = 2π√(k²/gGM) — a ship with GM of 1.5m and beam of 20m rolls with a period of approximately 8 seconds.
Inputs
B M
Reference formula or conversion factor shown for context.
Gm M
Vertical measurement. For health calculators, typically standing height without shoes.
C Roll
Distance from centre to edge of a circle. Radius = diameter / 2.
Results
roll period T_φ (s)
Reference formula or conversion factor shown for context.
empirical roll period (s)
Reference formula or conversion factor shown for context.
radius of gyration k (m)
The computed radius -- half the diameter.
T_φ = 2π·k/√(g·GM)
Reference formula or conversion factor shown for context.
GM interpretation
Qualitative summary of what the computed numbers mean in practical terms.