# Can I weigh without a set of scales?

So I'm at my sister's house, and it turns out she doesn't have any scales.

I need to weigh 120g of castor sugar.

What can I do?

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This site will convert weights to volumes, and says that you should use .53 of a US cup.

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Great find Neil - I was going to suggest water displacement or creating a quick and dirty fulcrum/balance beam and comparing it to objects of known weights - but .53 cups is SO much easier! – stephennmcdonald Aug 13 '10 at 18:17
Thanks just what I was looking for – Sam Holder Aug 13 '10 at 18:18
mad props to anyone who can eyeball .53 cups. – justkt Aug 13 '10 at 18:38
1/2 a cup is easy. Get out your half cup measure. 0.03 cups is just 1.44 teaspoons. I'd probably go sloppy and use a teaspoon and a half. – Wayfaring Stranger Aug 4 '15 at 20:40

You can also use Wolfram Alpha for this, for example 120 gram/density of sugar/cups.

Although, they don't have castor sugar in their system.

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+1 for finally finding a good use for wolfram alpha – Sam Holder Sep 11 '10 at 18:37

So it turns out she doesn't have any volume measurements either, other than a measuring jug.

So in the end I divided the 500g bag between two identical glasses, then divided one of those glasses up between 2 others to get approx 125g

Now it seems that the cake tin doesn't seal properly anyway so I can't imagine that my cheescake is going to turn out any good anyway...

For Neil, a measuring jug:

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Way to innovate. – justkt Aug 13 '10 at 19:01
Nice solution. What's a measuring jug? – Neil Fein Aug 13 '10 at 21:34
@Neil added a picture of a measuring jug for you – Sam Holder Sep 10 '10 at 16:30
That's the same thing we call a measuring cup. I had an image of a literal jug in my head. (The image was in my head, not the jug.) – Neil Fein Sep 10 '10 at 21:56