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Sailboat Specifications

Rasmus 31

Masthead Sloop · Fin Keel

Designed by Olle Enderlein · Built by Hallberg-Rassy · First built 1973

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LOA 31.00 ft  ·  Beam 10.00 ft  ·  Displacement 9,500.00 lb  ·  Sail Area 414.00 ft²  ·  Masthead Sloop  ·  Fin Keel
About the Rasmus 31 Sailboat

Designed in Scandinavia, the Rasmus 31 carries a reputation as a sturdy and capable bluewater cruiser that punches well above its size class. Built with the demanding conditions of Nordic waters in mind, this compact sailboat was engineered for serious offshore passagemaking rather than casual weekend sailing, earning it a loyal following among sailors who prioritize seaworthiness over luxury. The Rasmus 31 is perhaps best known for its robust construction and conservative, functional design philosophy. Its hull form reflects a traditional approach that prioritizes stability and safety in challenging conditions, making it a sensible choice for coastal and offshore cruising alike. The boat handles rough weather with confidence, a trait that has made it particularly popular among solo and short-handed sailors looking for a dependable bluewater platform on a modest budget. For prospective buyers, the Rasmus 31 represents an honest, no-frills cruising yacht with a track record that speaks for itself. Those willing to embrace its utilitarian character will find a capable and trustworthy companion for extended passages and coastal adventures.

Dimensions & Specifications
LOA (Length Overall) 31.00 ft / 9.45 m
LWL (Waterline Length) 24.75 ft / 7.54 m
Beam 10.00 ft / 3.05 m
Max Draft 4.40 ft / 1.34 m
Displacement 9,500.00 lb / 4,309 kg
Sail Area (Reported) 414.00 ft² / 38.46 m²
Design & Construction
Hull Type Fin Keel
Rigging Type Masthead Sloop
Construction FG
Designer Olle Enderlein
Builder Hallberg-Rassy
First Built 1973
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Frequently Asked Questions

What is the Rasmus 31's sail area to displacement ratio?

The Rasmus 31 has a Sail Area to Displacement ratio (SA/D) of 14.82. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Rasmus 31's comfort ratio?

The Rasmus 31 has a Ted Brewer Comfort Ratio of 25.68. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Rasmus 31 safe for offshore sailing?

The Rasmus 31 has a Capsize Screening Formula value of 1.89. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Rasmus 31?

The theoretical hull speed of the Rasmus 31 is 6.67 knots, calculated from its waterline length.

How much does a Rasmus 31 weigh?

The Rasmus 31 has a displacement of 9,500.00 lb and a length overall (LOA) of 31.00 ft.

Who designed the Rasmus 31?

The Rasmus 31 was designed by Olle Enderlein, first built in 1973.