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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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4 Answers 4

up vote 10 down vote accepted

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
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mad props to anyone who can eyeball .53 cups. –  justkt Aug 13 '10 at 18:38

Gourmet Sleuth can help you with its advanced conversion calculators.

For example, a teaspoon of baking powder does not weigh the same as a teaspoon of peanut butter. This calculator will simply give you an approximate measurement. When accuracy is imperative you should use the highly-accurate ingredient based calculator.

Weight To Volume Conversion Calculator shows that 120 gr sugar (powdered) = 1.2 cup or 48 teaspoons.

Just enter "sugar" as keyword and select "sugar, powdered" under "sweets" menu. Then enter the quantity, select conversion unit and click "Convert". On the left panel, you can see the results.

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Powdered sugar is denser than castor sugar. –  Dennis Williamson Aug 14 '10 at 19:23

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:

alt text

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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

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

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