Gallons To Tonnes Converter - CoolConversion

🏠 Home › Volume to Weight - Chemistry › US Gallon of Water to Tonne 1 gallon of water to tonnes

1 US gallon of water equals 0.00379 tonnes

Volume → Weight Weight → Volume For Construction

Inputs		?Notes: the results in this calculator are rounded (by default) to 3 significant figures. The densities values are show and are valid for a certain temperature. Don't use this calculator for critical purposes, unless you know what you are doing exactly.
Material or substance:
?Please, choose an substance by typing its name in the left box.
From
Volume Unit:	Volume Quantity:
milliliter (ml) liter (l) cubic meter (m³) ounce, US, Fluid cup, US gallon US ounce, UK, Fluid gallon UK cup UK	?Please, select the volume unit (cup, milliliter, liter ...) to which you want to convert, then select its quantity. Ex.: 1, 1/2, ...
To
Unit of Weight (Mass):
kilogram gram tonne pound ounce	?Please, select the weight unit (kilogram, tonne, pound, etc.), then press / click the 'Calculate' button.
Calculate!	Significant Figures: 2 3 4 5
Results Conversion Result Copy 1 US gallon of water weighs 0.00379 tonnes (0.0037854118 tonnes precisely)Note: Water at 25 °C | density: 1000 kg/m³
See also Substances Densities Chart

Note: A conversion table for 1 US gallon of 3 converted to tonnes is not shown because the resulting values would be extremely small (less than 0.01 tonnes). Consider using a smaller target unit for better precision.

How to Convert 1 US gallon of Water to Tonnes

Step 1: Get the density

Find the density of water. Different substances have different densities, which affects the conversion. Water at 25 °C | density: 1000 kg/m³

Step 2: Apply the conversion formula

Multiply 1 US gallon by the density factor to get the weight in tonnes.

mass = density × volume

Step 3: Get the result

1 US gallon of water equals 0.00379 tonnes.

How to convert from volume to mass (often referred to as weight)?

Well, by definition of density we just need to use the formula:

mass = density × volume

Example: How much does 2 cubic meters of gasoline weigh in kilograms if the gasoline density is 750 kg/m³?

Plugging the values in the formula, we get

mass = density × volume = 750 × 2 = 1500 Kg

Very simple isn't it? Yes, it is as simple as that. But this works fine when the density value we have (from a chart for example) is defined using the same unit of volume and mass that we will use in the formula. For example, mass in kg and volume in liters. If we have, for example, mass in pounds and volume in gallons, we should do something to correct our result.

To transform the mass from pounds to kilograms we should multiply the mass in pounds by 0.45359237. We will call 0.45359237 the mass conversion factor - mcf

Matematically we write:

mass in kilograms = mass in pounds × mcf or

mkg = mlb × mcf (1)

To transform the volume from gallons to cubic meters we should multiply the volume in gallons by 0.003785411784. We will call 0.003785411784 the volume conversion factor - vcf

Matematically we write:

volume in cubic meters = volume in gallons × vcf or

vm³ = vgal × vcf (2)

Now, dividing the equation (1) by the equation (2), we get

mkgvm³ = mlb × mcfvgal × vcf, or

mkgvm³ = mlbvgal × mcfvcf, but mkgvm³ is, by definition, the density (d) in kg/m³, so

d = mlbvgal × mcfvcf

Rearranging the formula above we get

mlb = d × vgal × vcfmcf

Finally, we can generalize this formula any units of mass and volume, since we know how to find the values for mcf and vcf (Check the factor tables below).

m = d × v × vcfmcf

That is exactly the formula that we use in this calculator. You can see how this formula works reading the example above or/and choosing another one at the bottom of this page.

These tables contain the most frequently used vcf and mcf.

Volume Unit	Factor to convert to m³ (vcf)
milliliter	0.000001
UK fluid ounce	0.0000284130625
US fluid ounce	0.00002957352956
UK gallon	0.00454609
US gallon	0.003785411784

Mass Unit	Factor to convert to kg (mcf)
milligram	0.000001
gram	0.001
kilogram	1
tonne	1000
pound	0.45359237
ounce	0.02834952313

Note: The conversion factors shown above are exact values by international definition. The pound (0.45359237 kg) was standardized in 1959, and the US gallon (0.003785411784 m³) is defined exactly as 231 cubic inches. The varying number of decimal places reflects each unit's official definition, not measurement precision.

References:

1. Mass, Weight, Density or Specific Gravity of Liquids
2. Mass, Weight, Density or Specific Gravity of Water at Various Temperatures

FAQs on water weight to volume conversion

1 US gallon of water equals how many tonnes?

1 US gallon of water is equivalent 0.00379 tonnes.

How much is 0.00379 tonnes of water in US gallons?

0.00379 tonnes of water equals 1 US gallon.

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