How many kilograms are in 114 liters?

Answer 1

one litre of water weighs one kilogram

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That is only approximately true. Until 1964 a litre was defined as the volume of one kilogram of pure water at 4 deg Celsius and at a pressure of 760 millilitres of Mercury. But that definition of a litre was abandoned in favour of 1 litre =1000 cubic centimetres.

Modern calculation, making adjustments for the ratios of hydrogen and oxygen isotopes, presure and temperature, give the mass of 1 litre as 0.999 975 kg ( ± 1 milligram)

Answer 2

To convert liters to kilograms, you need to know the density of the substance. The conversion factor depends on what you are measuring (e.g., water, oil, etc.). Once you have the density, you can multiply it by the volume in liters to get the mass in kilograms.