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Sailboat Specifications

Alden 45

Masthead Sloop · Fin W/Spade Rudder

Designed by Niels Helleberg · Built by Alden Yachts Inc. (Usa) · First built 1992

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LOA 44.83 ft  ·  Beam 12.50 ft  ·  Displacement 23,000.00 lb  ·  Sail Area 915.00 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
About the Alden 45 Sailboat

Designed by renowned naval architect Niels Helleberg and built by Alden Yachts from 1992 to 1997, this 45-footer represents a thoughtful blend of traditional sailing virtues and modern performance characteristics. The masthead sloop rig configuration, combined with 915 square feet of sail area, provides excellent power and balance across varying wind conditions. With a displacement of 23,000 pounds and substantial ballast-to-displacement ratio, the Alden 45 offers the stability and seakindly motion that serious cruising sailors demand for offshore passages. The fin keel and spade rudder configuration delivers responsive handling while maintaining the directional stability crucial for long-distance sailing. Her comfort ratio of 32.72 indicates a motion that favors security over speed, making extended passages more pleasant for crew. The fiberglass construction reflects proven boatbuilding techniques, while the 7.42-foot draft provides excellent upwind performance and access to most harbors. Her SA/Displacement ratio of 18.17 suggests moderate sail carrying power—ideal for cruising sailors who prioritize reliability over racing performance. This design philosophy makes the Alden 45 particularly well-suited for coastal cruising and offshore voyaging, where comfort, safety, and dependable sailing characteristics take precedence over pure speed.

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Market Price Estimate Beta
Small sample size. This estimate is based on fewer than 5 listings and may not be representative of the true market. Use with caution.
$355,000 – $355,000
typical asking price
Median $355,000  ·  2 listings used
All listings
$355,000 – $355,000 2
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Dimensions & Specifications
LOA (Length Overall) 44.83 ft / 13.66 m
LWL (Waterline Length) 34.50 ft / 10.52 m
Beam 12.50 ft / 3.81 m
Max Draft 7.42 ft / 2.26 m
Displacement 23,000.00 lb / 10,433 kg
Ballast 10,000.00 lb / 4,536 kg
Sail Area (Reported) 915.00 ft² / 85.01 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer Niels Helleberg
Builder Alden Yachts Inc. (USA)
First Built 1992
Last Built 1997
Owner Reviews

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Engine & Accommodations
Engine Make Westerbeke
Engine Model 63-B
Engine Type Diesel
Horsepower 60
Fuel Capacity 50 gals / 189 L
Frequently Asked Questions

What is the Alden 45's sail area to displacement ratio?

The Alden 45 has a Sail Area to Displacement ratio (SA/D) of 18.17. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Alden 45's comfort ratio?

The Alden 45 has a Ted Brewer Comfort Ratio of 32.72. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Alden 45 safe for offshore sailing?

The Alden 45 has a Capsize Screening Formula value of 1.76. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Alden 45?

The theoretical hull speed of the Alden 45 is 7.87 kn knots, calculated from its waterline length.

How much does a Alden 45 weigh?

The Alden 45 has a displacement of 23,000.00 lb and a length overall (LOA) of 44.83 ft.

How much does a used Alden 45 cost?

Based on 2 recent market listings, used Alden 45 sailboats typically sell for between $355,000 and $355,000, with a median asking price of $355,000. Price varies significantly based on year, condition, location, and included equipment.

Who designed the Alden 45?

The Alden 45 was designed by Niels Helleberg, first built in 1992.