I need to calibrate a 500 gram jewelry scale. Can someone tsuggest a household item, besides coins, that weighs exactly 500 grams, or even something that weighs 100 grams?
by 
Jodie44
ANSWERS: 8
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A liter of water is almost exactly 1 kilogram. Measure out an exact 1/2 liter. (If you don't have liter measurements, each gallon is 3.7854118 kilograms). You can also check the weight on various soup cans.
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I noticed that a 1 lb. box of Arm and Hammer baking soda is listed at 454 grams net weight. I can't confirm if the box weighs more or less than the remaining 46 grams but it's probably pretty darn close. (I know, close isn't quite what you're after).
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From the days of my misspent youth( and most of my middle age) it is best to check the scale at 4 or 5 ranges. say 10 grams and 35 grams, 125 grams, 350 grams and 450 grams. The use of a good volume-metric flask can help as well ; take the tare weight of the flask and then fill to the marked line on the neck, this will tell you if the water weight is near right. A good set of brass standards would be a reasonable investment. Stacks of NEW coins can be used as a known load as well. You should never expect accurate measurements at the extreme range of the scale, low or high. Last but not least, have a friend with a good electronic dope scale check yours against his. Typically they have a range of from .05 grams to 65 or 125 grams and should help you check out the low end accuracy of your instrument. Remember 31 grams to the troy oz. and 12 ozs. to the troy lb. & 5 carats to the gram. A 500 gram scale is not the right toy to use on carat stones and it's a rare project that uses 16 troy ozs. of silver or gold.
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a nickel weighs 5 grams. that is what i've used.
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well i just had the same problem with my scale so i used a scale that my friend had and weighed out things that equaled 500 grams an put it on my scale to recalibrate it.
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A scale can only be as accurate as the standard used. You might contact a local scale company that does that for a living, that is registered with the state department of weights & measures.
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I confirm the current U.S. Nickel is the wat to go! U.S. Mint says each one is 5.000 (That's thousandths!) Grams. 20 is a Hundred Grams, 50 is Two Hundred Fifty Grams, etc, etc. 40 Nickels to a roll, so two and a half rolls equals your 500G! (Remember, take off the paper wrapper on the nickels!)
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If you don't want to use coins, you are wishing and hoping. Two dollars in zinc pennies weigh exactly 500 grams. Zinc pennies are dated 1983 to present.
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