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I have the following equation:

$\frac{n\times2.2046}2\times0.0284130625$

to: convert kg to lbs, divide by $2$, then convert the result from oz to L

is there a shortcut to do this without the conversion to imperial?

yeah, I know this is probably a very elementary question, math has never been my strong suit.

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    sorry, J.M., I should have explained that better. If you mean the equation for lbs:oz, I have found it in various places, couldn't give you an exact reference without searching it out again, it gives a similar result to 1L:1000cal. As for the equation above, it was what I was able to come up with myself to take a stored metric value, perform the imperial equation, and return a metric result.2012-08-09

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$1$ pound is $16$ ounces, and $1$ litre of water has mass very, very close to a kilogram (apparently only about 0.999975 kg). So you should be able to multiply the mass in kg by $\frac{1}{32} = \frac{1}{2} * \frac{1}{16}$ to get effectively the same result.

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    But keep in mind, if you are in a Commonwealth country that uses Imperial fluid ounces, you don't need quite as many as you would of US fluid ounces, because an Imperial fluid ounce is about 4% bigger than a US fluid ounce.2015-07-29