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Sailboat Specifications

Cal 36

Masthead Sloop · Fin W/Spade Rudder

Designed by C. William Lapworth · Built by Jensen Marine (Usa) · First built 1966

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LOA 35.50 ft  ·  Beam 10.33 ft  ·  Displacement 11,200.00 lb  ·  Sail Area 600.00 ft²  ·  Masthead Sloop  ·  Fin W/Spade Rudder
About the Cal 36 Sailboat

Designed by the legendary C. William Lapworth and built by Jensen Marine starting in 1966, this classic represents the pinnacle of California's racing-cruiser philosophy from sailing's golden era. Lapworth's genius shines through in the boat's balanced proportions and proven seaworthiness, making it a standout performer both on the racecourse and as a capable coastal cruiser. With its fin keel and spade rudder configuration, the Cal 36 delivers responsive handling and impressive windward ability. The masthead sloop rig provides excellent sail-carrying power, while the moderate displacement keeps the boat lively in light air. At 11,200 pounds with 4,500 pounds of ballast, she strikes an ideal balance between stability and performance. The boat's impressive sail area to displacement ratio of 19.24 ensures spirited sailing, while the conservative comfort ratio of 26.12 and capsize screening value of 1.85 indicate she's well-suited for serious coastal cruising and limited offshore passages. Her hull speed of nearly 7 knots means rewarding passage times under sail. This design has earned respect for its solid fiberglass construction, spacious beam of just over 10 feet, and reputation for longevity. Cal 36 owners consistently praise the boat's sea-kindly motion and ability to handle challenging conditions with confidence.

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Jensen Marine used a balsa-cored deck on the Cal 36, and the balsa core is prone to saturation and rot around deck hardware penetrations, chainplates, and the mast base where bedding compounds have failed over time.
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The Cal 36 uses an external lead or iron keel attached with keel bolts that are known to corrode and weep rust staining in the bilge. The keel-to-hull joint sealant deteriorates and allows water intrusion, which accelerates bolt corrosion and can lead to keel movement.
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Chainplate attachment on the Cal 36 passes through the balsa-cored deck or is tabbed to the hull liner; the backing plates and tabbing are known to fatigue and the surrounding laminate can delaminate, making chainplate integrity a critical inspection point.
+ 5 more issues — see full list →
Market Price Estimate Beta
$3,000 – $14,000
typical asking price
Median $12,800  ·  5 listings used
All listings
$3,000 – $14,000 5
About this estimate ▾
Dimensions & Specifications
LOA (Length Overall) 35.50 ft / 10.82 m
LWL (Waterline Length) 27.00 ft / 8.23 m
Beam 10.33 ft / 3.15 m
Max Draft 5.70 ft / 1.74 m
Displacement 11,200.00 lb / 5,080 kg
Ballast 4,500.00 lb / 2,041 kg
Ballast Type Lead
Sail Area (Reported) 600.00 ft² / 55.74 m²
Design & Construction
Hull Type Fin w/spade rudder
Rigging Type Masthead Sloop
Construction FG
Designer C. William Lapworth
Builder Jensen Marine (USA)
First Built 1966
Owner Reviews

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Engine & Accommodations
Engine Make Universal
Engine Model Atomic 4
Engine Type Gas
Horsepower 30
Fuel Capacity 30 gals / 114 L
Water Capacity 80 gals / 303 L
Frequently Asked Questions

What is the Cal 36's sail area to displacement ratio?

The Cal 36 has a Sail Area to Displacement ratio (SA/D) of 19.24. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.

What is the Cal 36's comfort ratio?

The Cal 36 has a Ted Brewer Comfort Ratio of 26.12. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.

Is the Cal 36 safe for offshore sailing?

The Cal 36 has a Capsize Screening Formula value of 1.85. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.

What is the hull speed of the Cal 36?

The theoretical hull speed of the Cal 36 is 6.96 kn knots, calculated from its waterline length.

How much does a Cal 36 weigh?

The Cal 36 has a displacement of 11,200.00 lb and a length overall (LOA) of 35.50 ft.

How much does a used Cal 36 cost?

Based on 5 recent market listings, used Cal 36 sailboats typically sell for between $3,000 and $14,000, with a median asking price of $12,800. Price varies significantly based on year, condition, location, and included equipment.

Who designed the Cal 36?

The Cal 36 was designed by C. William Lapworth, first built in 1966.