Sailor's Solutions LLC      
Marine Calculators
Hull Speed
Maximum Speed of a Single-Hull Displacement Boat

Hull Speed = 1.34 * (LWL)1/2
  
What's your boat's length of waterline in feet?  
 

Boat Speed
If your speed log is disabled, you can calculate the boat's speed by determining the time it takes for a wood chip or other floating object to pass from the bow to the stern. If you want to retrieve the object, attach a string to it.

Boat Speed = (60 (sec/min) * 60 (min/hr) * length of boat in feet) /
( 6076.1 (feet/nautical mile)* seconds for chip to pass)
How long is your boat in feet?
How long does it take for a light object to reach the end of the boat in seconds?
 

Sail Area Displacement Ratio
This ratio indicates how fast the boat is in light wind. The higher the number the faster the boat.
10-15Cruiser
16-20Cruiser-Racer
21-24Racer
> 24Performance Racer

Sail Area Displacement Ratio = Sail Area / ( Displacement Volume )2/3
Displacement Volume in Cubic Feet = Weight in Pounds / 64
What is the area of your sail in square feet?
How heavy is your boat in pounds?
 

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SmartLock outboard motor lock for engines to 35/40 HP

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Extra Large Soundproofing Kit - 48 tiles for wider 36'-42' boat engine compartment (1 inch X 1 foot X 1 foot tiles)
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SCAD Sensibulb™ LED Light - LED cabin light bulb replacement Made in USA!
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Velcro® Brand Marine Grade Hook and Loop,
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Solve onboard mounting problems fast! A little goes a long way!
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WinchRite ABT Cordless, Lightweight, Electric Winch Handle
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Medium Soundproofing Kit- 18 tiles typical 32'-36' boat engine compartment (1 inch X 1 foot X 1 foot tiles)
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Signal Mate 2NM LED Tri-Color plus Anchor, Wind Indicator Illumination and Daylight Sensor (bracket included)
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Signal Mate 2NM LED Tri-Color & 2NM Anchor with Wind Indicator Illumination Includes mounting bracket
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