Comfort Ratio: a limited approximation
Ted Brewer’s index is an empirical comparison, not a comfort measurement.
Conventional formula
CR = displacement_lb / [0.65 × (0.7 × LWL_ft + 0.3 × LOA_ft) × beam_ft^1.333]In plain language
The formula combines displacement, length and beam. It uses pounds and feet; we retain the conventional exponent 1.333 so the calculation can be reproduced.
How to interpret it
The number provides context for discussing motion between similarly sized monohulls.
Why it matters
It may highlight differences worth exploring during a visit and sea trial.
Limitations
It omits detailed hull shape, centre of gravity, sea conditions and personal sensitivity. We do not assign automatic ocean-suitability bands.
In practice
A higher value does not replace experiencing the boat or checking its condition.
This is not a comfort or safety certificate.
Sources & reading
Discuss this concept
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