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I'm struggling to understand the relationship between SI units and Imperial units when it comes to weight, density and gravity. Using water as an example:

I know that F = m g

I also know that gravity is g = 9.81 m/s^2 or 32.174 ft/s^2 and that

density of water is Pw = 1,000Kg/m^3 and that

the weight of water is 62.43 pounds per cubic foot, or 62.43 lbf/ft^3.

So with this knowledge what is the formula to get

Weight of water (in SI units) == weight of water (in Imperial units)

When starting form F = m g?

Thanks!

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# Weight, Density and Gravity

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