Questions and answers on how to convert things from one unit or system to another



Postby Paul » Mon Aug 23, 2004 9:00 am

How many litre per 1 ton of car petrol? :(

Re: Petrol

Postby Knight » Tue Aug 31, 2004 2:03 am

Paul wrote:How many litre per 1 ton of car petrol? :(

I'm going to make a guess, based on the spelling of litre you've used, and the fact that you're refering to 'petrol' that the ton that you're refering to is a metric ton (tonne) of 1,000 kg.) If this is incorrect, we'll have to adjust the numbers that I'm going to give, but the method will be the same.

As I've explained a few times here, the magic trick for converting from weight to volume, or volume to weight is specific gravity - That is, how much does a given volume of a substance weigh.

In the metric system, the unit of specific gravity is grams per cubic centimeter. The baseline of the system is water, whcih weighs 1 gram per cubic centimerer. This coincidentally means that one kilogram of water weighs one kilogram.

The specific gravity of Gasoline (automotive petrol) is 0.739. That means that one cubic centimeter of petrol weighs 0.739 grams, and that one liter of petrol then weighs 739 grams.

As you've got 1,000 kilograms of petrol, we need to divide that weight by the specific gravity (0.739), and we'll find that we have 1,353.18 liters of petrol.
William J. Knight
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Los Alamos National Labs
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