Can anyone tell me what is kilonewton and newtonmetre and how do

you convert from newtonmetre to kilonewton

kilonewton (kN). 9.9640. Torque: 0.7376 pound-force foot (lbf ft) newton metre (Nm).
1.356. 0.10197 kilogram-force metre (kgf m) newton metre (Nm). 9.80665 ...

A KiloNewton is 1000 Newtons. A Newton is the SI unit of force that when applied to one kilogram
mass would experience an acceleration of one meter per second per second. (Kg m /sec²)

A Newton-meter is another name for the SI unit of work or energy, the Joule. Work is defined as force
times distance, so the Joule would be one kilogram mass accelerated to one meter per second per
second over a distance of one meter:

Kg m /sec² ∙ m = Kg m²/sec².

As you can see, you cannot really convert from from Joules to Newtons. The Joule is dependent on
the Newton by definition.

You could divide the number of Joules by the distance, thus ending up with the number of Newtons
applied, and then divide the number of Newtons by 1000 to convert Newtons to KiloNewtons. For
example:

100 Joules ÷ 1 meter = 100 Newtons

100 Newtons ÷ 1000 Newtons/KiloNewton = 0.1 KiloNewtons

All this would do is tell you how much force you applied to a distance - which is something you
already know.
Horsepower to watts
Yes I saw the conversion that 746 watts equalls 1 horsepower, but then that means that you could only get a
maximum of 2 horsepower from a standard 15 amp outlet.  There are many electric motors that are 15 amps and
can pump up to 6hp.  How is that possible with the formula 1 hp is 746 watts?
It shows that a small appliance outlet could output up to 3840 watts at 240 volts. That would make about 5 hp
motor max.

Maybe the motor manufacturers use different ways to measure the hp?!?!

You know how a 17 inch video monitor may only have a 16 inch viewable screen... Maybe they do something
similiar with other electrical appliances to scam us into buying stuff. Lol

Not all horsepower ratings are the same. The 746 watt figure is a direct conversion from reading power from one
term of measurement to another.
  When one looks at electric motors, lets use vacuum cleaners and table saws as examples, the HP rating
advertised is a 'Rated HP' or 'Peak HP.  That rating is used solely for marketing purposes and really is quite
deceptive.  The one figure you can use for accurate comparison is 'watts'. This is a measurement of the amount
of electricity a particular circuit will consume  when it is operating in the manner the manufacturer designed.
    Also, not all 5 HP motors are equal. There are many different types of motors, disigned for a broad variety of
uses. Then there is the 'service factor'. Service factor measures the degree to which a motor can be overloaded
for *very short*periods of time.  This is because not all motors are expected (designed) to start with the load
already applied to the motor. A fan motor will generally have a lower service factor rating than a motor driving a
conveyor belt. The fan motor has the weight of the fan blade and the air resistance (remember, air has mass,
too) to get into motion. A motor driving a conveyor belt has the mass of the belt, whatever is ON the belt and the
friction of the bearings to put in motion from a dead stop. Quite a bit more load on the conveyor motor than on the
fan motor.
   Keep in mind that these a broad general statements for the sake of comparision.

    This is just an inkling of what your electrician must understand to be an electrician. I am an electrician. There is
MUCH more info to know - or know where to find - than the average Joe/Jill would expect.

I failed to mention that by textbook definition a 15A 120 volt circuit is able to provide 1800 watts or 2.412 HP.
Since ALL electric motors are not 100% efficient - some of the electricity is converted into to heat, which is why
they get warm in use - and have a degree of 'slip'
( the measurement of how much of the electricity actually causes the motor shaft to move with a load applied
when compared to an identical motor that has no load).  This is part of motor design and is one reason that not
all motors of a given HP rating are the same.

746 watts = 1 horsepower

Are you sure that they are even meaning the electrical hp.  On one of the postings labled "Horsepower Gas v.s.
Electric" it states that they are different.  

If there is gas horsepower and electric horsepower which horsepower is the horsepower in the formula?
I missed the fact that you already stated that;
"Not all horsepower ratings are the same. The 746 watt figure is a direct conversion from reading power from one
term of measurement to another".
   So Really I think the best way is just like you said is to go by watts.  But it frustating because for example if I'm
looking through a Canadian Tire catalogue and am looking at tools I notice that routers, drill press's, and bench
grinder's are in horsepower ratings, which leaves me in a more unfamiliar territory.  Glad to see that most other
tools and ampliance's are rated in amps.  
Convert Voltage/Hertz to Watts?
I'm testing out a new generator and need to know Rated (Running) Watts for different appliance loads. I have a
refrigerator and freezer with metal placards that don't provide Watt information and I don't have the manuals.
Both say 115 Volts and 60 Hz. Can Running Watts be determined with this information? If so, how? If not, how
do I determine Wattage? Anyone's help would be appreciated.
Freezer: AMPS 4.3; H.P. 1/4; 115V; 60 HERTZ
UL LISTED HOUSEHOLD FREEZER 126A
GE HOTPOINT Refrigerator: AMPS 7.5; 110V. AC 50HZ
115V. AC 60HZ   11-642998 POB
UL LISTED HOUSEHOLD REFRIGERATOR 183A
Thank you, Andy W. awigner@aol.com

The formula is:

Watts = Volts * Amps

For your freezer:

4.3 amps * 115 volts = 494.5 watts

For your refrigerator:

7.5 amps * 110 volts = 825 watts

KVA to HP or KW
DHow do we determine if the KVA rating of our power generator is enought to run a certain HP or KW load?

In a DC circuit, a volt-ampere is the exact same thing as a watt.

In an AC circuit, if the current and voltage are in phase with each other, then again, a volt-ampere is the exact
same thing as a watt.

If the current and voltage are out of phase, then the product of the voltage potential and the actual current, is the
load, in volt-amperes.

What does all this mean, do you ask? Well if the current and voltage are out of phase, it is going to appear to
draw more current than it really is, which would make the power rating (watts) higher. But if you go by the actual
current, the load rating (VA) it wouldn't.

So if your power generator has a KVA rating, in theory it would run the same number in KW.

Why did I use the term "in theory"? Because in real life I do not know. If your fuses are set to blow from current,
the appearance of the higher amount of current in an out of phase AC circuit, might cause them to blow, but I
don't know.

Perhaps there is an electrical engineer reading this who could post with more information.

Newton meters to watts with RPM

I have an ergometer which displays Nm & watts, depending on the pedal cadence (RPM).

Is there a way to convert between Nm and watts for different RPM's?

The ergometer only shows values of NM & watts up to 70 RPM, and I want to pedal faster.  
Bob,
Don't quote me but this sounds like a variation of the question I asked. I believe Newton-Meters is a measure of
force whereas Watts measure power, or force applied over a period of time. One way maybe to convert Newton-
Meters to pounds, RPM to feet per second, foot -pounds/sec to Watts. Once that you've established a known
RPM to NM you could work a new speed into the equation. It's a long way around and there is most likely a much
better way, but this should work.
Ray Viv

If what you say is true, does that mean that the watts reading (which is on the same scale as the Nm) has to
have the amount of time I'm pedaling at a given NM and RPM figured into the equation to get the actual amount
of watts?

Suppose I pedal at 70 RPM, and 20 Nm for 20 minutes.

Is the wattage any different if I pedal at the same NM & RPM for 30 minutes?

Watt and Newton meter are different, but somewhat related.

1 watt is equal to 1 newton meter per second.

1 newton meter is equal to 1 watt per second.

I don't know if that will help you any.

My earlier statement that Watts are a measure of force over a period of time is confusing because time is used
as the rate the force ia applied. 746 watts is equal to a horsepower. which is 550 lb/ft (the force) per second (the
rate). These are instantaneous values. If you were to pedal for an hour while generating 1000 watts constantly
that would be a kilowatt-hour, a cumulative measure of power that the utility uses to charge us for their power
monthly.
One lb/ft is equal ro 1.357 newton-meters, both are measures of force, just an English vs. Metric thing.
I hope I haven't caused more confusion, it's the fact time is used in differing ways in different formulas that is
confusing to most of us.
Ray

Yes, I think the time makes it confusing.

If I pedal at, say 70 RPM and the meter (a mechanical one that changes depending upon how I set the resistance
of the brake pads on the flywheel) indicates 19Nm and 132 watts, then watt :) does that mean with reference to
time?   Does it mean 132 watts per hour, and if I pedal for 30 minutes, then does that mean I've only generated
(?) 66 watts?  (Is generated the right word, or is it consumed or something else)?

What would be the most meaningful at-home measurement (if there is one) for tracking my exersize progress, to
plot on a graph relative to my heart rate? (Average heart rate during the exersize session).  

Unfortunately I no longer have the instructions from the ergometer, having bought it in the 70's.

Thanks again for your replies...Bob

Well if it says you're generating 19 Nm, then you're generating 19 watts per second. Not sure where they get the
132 watts. I suppose it is just there for a reference.

I believe you should exercise based on your heart rate. There is an ideal exercise heart rate based on your age.
(I dont know what it is, you'll have to check a health site maybe)  At the end of your routine, check your heart
rate, once it gets below your ideal rate, then next time pedal faster, or increase resistance.

You could use either the Nm or watts to graph your progress. I doubt they are accurate, but it is probably
consistantly inaccurate, so you'll still be able to plot your improvement.

Convert kN to ton-force - Conversion of Measurement Units

How many kN in 1 ton-force? The answer is 9.964016384.
We assume you are converting between kilonewton and ton-force [long].
You can view more details on each measurement unit:
kN or ton-force
The SI derived unit for force is the newton.
1 newton is equal to 0.001 kN, or 0.000100361135657 ton-force.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between kilonewtons and tons-force.
Type in your own numbers in the form to convert the units!

The SI prefix "kilo" represents a factor of 103, or in scientific notation, 1E3.

So 1 kilonewton = 103 newtons.

The definition of a newton is as follows:

In physics, the newton (symbol: N) is the SI unit of force, named after Sir Isaac Newton in recognition of his work
on classical mechanics. It was first used around 1904, but not until 1948 was it officially adopted by the General
Conference on Weights and Measures (CGPM) as the name for the mks unit of force.

How to convert kN to tonnes?

Like grams and kilograms, tonnes gave rise to a (now obsolete) force unit of the same name: 1
tonne-force = 9.80665 kilonewtons (kN), a unit also often called simply "tonne" or "metric ton"
without identifying it as a unit of force. Note that it is only the tonne as a unit of mass which is
accepted for use with SI; the tonne-force or metric ton-force is not acceptable for use with SI.

Metric ton equals = 10 kN , as approximately 1 kg = 10 N

we consider g = 10 instead of 9.81 for simplicity

for the short ton (2000 pounds ) , u got bills answer