OceanCalc

Capsize Screening Factor — Formula

Simple beam / (DISPL/64)^(1/3) style screening number (displacement in pounds).

Last updated: March 28, 2026

Author: OceanCalc Editorial Team · Publisher: Albor Digital LLC

Page focus

See how the Capsize Screening Factor is derived. Use the live tool above, then read the formula section below for the exact relationship and context.

Capsize Screening Factor

Result

Screening value

2.4

Formula

Beam ÷ cube root of (displacement in cubic feet from lb÷64)

Overview

The Capsize Screening Factor helps you perform accurate maritime calculations quickly, using standard nautical relationships and clear inputs.

How to use

To use the Capsize Screening Factor, enter your values in the fields above. Results update as you adjust numbers, so you can compare scenarios without leaving the page.

Formula

The relationship behind this tool is: Beam ÷ cube root of (displacement in cubic feet from lb/64)

Historical rule-of-thumb screening; not a substitute for stability letters, STIX, or naval architecture review.

Practical use cases

Typical uses for the Capsize Screening Factor include passage planning, briefing crew, converting instrument readouts to chart units, and double-checking mental math when fatigue or weather make errors more likely.

Tips for accuracy

  • Confirm that the units you enter match your chart, GPS, or instrument readout before relying on the Capsize Screening Factor.
  • In rough weather or poor visibility, cross-check important results with a second method or a crew member.
  • Treat simplified models (wave height, radar horizon, etc.) as estimates—real conditions vary with fetch, refraction, and equipment.

Practical examples

  • Lower values often correlate with offshore-oriented designs in popular literature—verify with official data

Frequently Asked Questions

  • Is this certification?

    No. It is an approximate comparative index only.

  • How accurate is this calculator?

    This calculator uses standard maritime formulas and practical approximations where noted. It is suitable for planning and cross-checks; always verify safety-critical decisions with official references and local conditions.

  • Can I use this on mobile?

    Yes. OceanCalc tools are responsive and work on phones and tablets for quick checks on deck or in the cockpit.

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Results are estimates for educational purposes only and should not be used for real navigation decisions.

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