Knotts conversion to mph

[MarkAB]

I tested a boat I want to buy. The speedo is calibrated in knotts. Any idea what 25 knotts is in mph?

 

[jajeeper]

Re: Knotts conversion to mph

KTS to MPH 5 Knots = 5.8 MPH <br />10 Knots = 11.5 MPH <br />15 Knots = 17.3 MPH <br />20 Knots = 23.0 MPH <br />25 Knots = 28.8 MPH <br />30 Knots = 34.6 MPH <br />35 Knots = 40.3 MPH <br />40 Knots = 46.1 MPH <br />45 Knots = 51.8 MPH <br />50 Knots = 57.6 MPH <br />55 Knots = 63.4 MPH <br />60 Knots = 69.1 MPH <br />65 Knots = 74.9 MPH <br />70 Knots = 80.6 MPH <br />75 Knots = 86.4 MPH <br />80 Knots = 92.2 MPH <br />85 Knots = 97.9 MPH <br />90 Knots = 103.7 MPH <br />95 Knots = 109.4 MPH <br />100 Knots = 115.2 MPH <br />105 Knots = 121.0 MPH <br />110 Knots = 126.7 MPH <br />115 Knots = 132.5 MPH <br />120 Knots = 138.2 MPH <br />125 Knots = 144.0 MPH <br />130 Knots = 149.8 MPH <br />135 Knots = 155.5 MPH <br />140 Knots = 161.3 MPH <br />145 Knots = 167.0 MPH <br />150 Knots = 172.8 MPH

 

[rnsi]

Re: Knotts conversion to mph

http://www.disastercenter.com/convert.htm

 

[cp]

Re: Knotts conversion to mph

A knot is a nautical mile per hour; a nautical mile is 1.15 statute miles. One knot is 1.15 mph, so as given above, 10 knots is 11.5 mph.<br /><br />NASA Explanation

 

[Stratocaster]

Re: Knotts conversion to mph

And the reason we use knots (nautical miles per hour) is because why?<br /><br />One nautical mile is equal to one minute of latitude. And 60 minutes equal one degree.<br /><br />This is essential if you ever use a chart to navigate, and much more useful info than MPH.<br /><br />Mike P

 

[Elk Chaser]

Re: Knotts conversion to mph

traveling in knots.

 

[Elk Chaser]

Re: Knotts conversion to mph

I'll have to go have a drink to figure this one out.

 

[Elk Chaser]

Re: Knotts conversion to mph

So that means that my boat which measures 25 feet on land actually measures 21.25 feet on water............<br /><br />Right?

 

[rnsi]

Re: Knotts conversion to mph

<br />I'll have to go have a drink to figure this one out. <br />

So that means that my boat which measures 25 feet on land actually measures 21.25 feet on water............<br />

After a couple of drinks, this actually makes sense!

 

[Peter J Fraser]

Re: Knotts conversion to mph

MPH (Statute mile)and Km/hr (Kilometer) are LAND measurements.<br />Knots (Nautical Mile) is used for marine navigation as stated in post above re latitude lines.<br />Knots are also used widely in aviation for similar reasons.<br />Regards<br />Peter

 

[Franki]

Re: Knotts conversion to mph

An interesting tidbit for you guys.<br /><br />Google does conversions for you, all of them.<br /><br />If you go to google.com and type:<br />10 knots to miles<br /><br />Into the box, it will return:<br />10 knots = 11.5077945 miles<br /><br />You can use the same method to convert temperatures, weights and other stuff.<br /><br />Very handy.<br /><br />Rgds<br /><br />Franki

 

[calwldlif]

Re: Knotts conversion to mph

add 15%

 

[jheron]

Re: Knotts conversion to mph

Here is a the best free program that I have found that will convert anything to anything It is a very small program that needs not to be installed ... check it out <br /> http://www.joshmadison.com/software/convert <br />Regards Jon

 

[Paul Moir]

Re: Knotts conversion to mph

Now some more fun with units and navigation:<br /><br />Since a meter was orginally defined as an estimated at 1 / 10,000,000 of a quadrant of the earth (distance from equator to a pole), there's a direct relationship with nautical miles which are 1 / 5400 (90° x 60 mins/degree) of a quadrant of the earth. Natually, you'll want to use kilometer for comparision (1 / 10,000th).<br /><br />Ok, I'll admit that wasn't fun at all... <br /><br />EDIT: Not really very interesting either, eh?

 

[swist]

Re: Knotts conversion to mph

"So that means that my boat which measures 25 feet on land actually measures 21.25 feet on water............"<br /><br />That's actually possible, according to the theory of relativity. Only problem is that the boat would have to be going a healthy percentage of the speed of light. Let's just guess that it might be 150000 miles per second. That's 540 million miles per hour. So if your 200 horse engine moves the boat at 50 mph and we assume just for the sake of argument that it will go faster in direct proportion to horsepower then you will need approx a 2 billion HP engine to shorten your boat by a few feet. I believe I saw one on a bass boat last week...<br /><br />God bless Einstein.

 

[swist]

Re: Knotts conversion to mph

Also when you come back from a trip at that speed, you will have aged less than the people standing still. High speed boating keeps you young.

 

[MrBill]

Re: Knotts conversion to mph

Given the accuracy of boat speedos, it almost doesn't matter if your guage is in knots...but WildLife had it right...just add 15%...should be easy to calc fast

 

[Tom2697]

Re: Knotts conversion to mph

"So that means that my boat which measures 25 feet on land actually measures 21.25 feet on water............"<br /><br />That is true is you keep your boat at a marina. They will measure LOA versus hull length and charge you more for it.

 

[Capn Mike]

Re: Knotts conversion to mph

Not all marine charts are in nautical miles: Columbia River charts show distances in statute miles....presumably because the charts go some 225+ miles inland. I presume many other rivers are the same.<br /><br />All our charts...even current US inland charts...are ultimatly authenticated through British Admiralty offices before publication. C-Map, Navionics and other GPS programs also receive their updates through the same office. Certainly that's why the latitude and longitude lines, which when finally accepted by the Admiralty, established "0" in Greenwich.<br /><br />As Paul mentioned, kilometers are measured from the equator to the North Pole; but through Paris. Another Franco-Anglo pi$$ing match that's confused the rest of us to this day. It doesn't help that England finally caved in....and then Canada. But my milage sure improves when I drive north of the border....