# Does anyone know how to find the scale weight of an item?

Discussion in 'Tips, Tutorials & Tools' started by pashlispaht, Oct 6, 2004.

1. ### pashlispahtMember

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I have a question for any of the more mathematically astute members of the audience. Does anyone have any idea on how to find the scale weight of an item? For instance, if a particular tank weighs 40 tons at 1:1, how much would it weigh at 1:25? This is assuming that the density is also scaled as well. I hope someone out there knows the answer to this...
2. ### MauriceMember

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pashlispaht

Weight, like volume, varies with the cube of the linear scale.

So
(1/25)x(1/25)x(1/25) = 1/15,625
and your model of a 40 ton tank will weigh
40x2240/15,625 = 5.7344 lbs or 40x1000/15,625 = 2.56 kg

Assuming that your talking about one of those tons that weighs 2240 lbs or 1000 kg and not one of those tons that weighs something else.

Density of course does not get scaled - it is weight/volume and that is the same as (scaled weight)/(scaled volume).

Cheers
Maurice
3. ### SteveMMember

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Isn't 1000kg a "tonne" while a "ton" is 2000 lbs.?
4. ### charliecActive Member

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Depends on whose "ton" you are referring to - the old Imperial ton was 2240 lbs - I think the US "ton" was/is 2000 lbs. The metric "tonne" is pretty close to the Imperial ton.

Why 2240 lbs? - an Imperial ton was 20 hundredweight (cwt) where 1 hundredweight (cwt) was 112 pounds (lbs) or 8 stone (and 1 stone was 14 lbs). Can't imagine why we went to metric units....

Regards,

Charlie

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