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Gram is a weight measure, and Litres are a volume measure. If you have 1 liter of water, then it weighs 1000 grams (assuming that it is at standard temperature and pressure [STP]). If it is 1 liter of something else, then the number of grams differs.

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10y ago

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More answers

None.

A milligram is a measure of mass. A litre is a measure of volume. The two measure different things and,according to basic principles of dimensional analysis, conversion from one to the other is not valid.

If you are not convinced, consider a litre of air. How many milligrams? Next consider a litre of lead. How many milligrams?

The masses of equal volumes of the two substances will clearly be very different. So there is no direct conversion between mass and volume: you need to know the density of the substance to enable you to carry out the conversion.

Some people still believe that there is a conversion in relation to pure water but that is only approximately true. Until 1964 (nearly 50 year ago!) a litre was defined as the volume of one kilogram of pure water at 4 degrees Celsius and at a pressure of 760 millimetres of Mercury. With that definition a conversion would have been valid - but only for pure water and only under those conditions. In any case that definition of a litre was abandoned in favour of 1 litre =1000 cubic centimetres.

In fact the density of pure water, at 4 deg C and 760 ml of mercury is 999.9720 kg/metre3

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12y ago
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There is no answer because milligrams is a measurement of weight and 1 L is volume. If you meant how heavy 1L is in milligrams, this depends on the substance's density.

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Wiki User

9y ago
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There are 1,000,000 milligrams (mg) in 1 liter.

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AnswerBot

9mo ago
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3.78

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Wiki User

13y ago
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Q: How many mg in 1 litre?
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