# 8 gallons of water, pure in pounds

8 US gallons of water, pure equals 66.8 ( ~ 66 3/4) pounds

### To

Significant Figures:

### Results

8 US gallons of water, pure weighs 66.8 ( ~ 66 3/4) pounds.

66.763236 pounds precisely. Some values are approximate. Note: Water, pure at 4 °C | density: 1000 kg/m³. At 4°C pure water has a density (weight or mass) of about 1 g/cu.cm, 1 g/ml, 1 kg/litre, 1000 kg/cu.m, 1 tonne/cu.m or 62.4 lb/cu.ft. kg/m3 divided by 16.02 = lbs/cu.ft. kg/m3 divided by 1,000 = g/ml Convert g/cm3 = g/cc = g/ml = g/mL - they are all the same.

## How to convert 8 US gallons of water, pure to pounds

To convert a quantity of a substance or material expressed as a volume to mass we simply use the formula:

mass = density × volume

We want to calculate the mass in pounds from a volume in US gallons. We have the density table at the bottom of this web page that shows us the densities values in kg/m³, so we will use the folowing formula (see why below):

mass = d × v × vcfmcf, where mcf is the conversion factor to convert from pound to kilogram (table near the end of this page) and vcf is the conversion factor to convert from US gallon to cubic meters.

So, plugging these values in the formula above, we get:

mass = 1000 × 8 × 0.003785410.453592

mass = 30.28330.453592

There are other ways to convert from volume to mass. This is one of them.

## How to convert from volume to mass (incorrectly called 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 cubic meters 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

v = vgal × vcf (2)

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

mkgv = mlb × mcfvgal × vcf, or

mkgv = mlbvgal × mcfvcf, but mkgv 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.

## US gallon of water, pure to pound near 8 US gallons

US gallons of water, pure to pounds
7.1 US gallons of water, pure = 59.3 pounds
1/5 US gallons of water, pure = 60.1 pounds
7.3 US gallons of water, pure = 60.9 pounds
7.4 US gallons of water, pure = 61.8 pounds
1/2 US gallons of water, pure = 62.6 pounds
7.6 US gallons of water, pure = 63.4 pounds
7.7 US gallons of water, pure = 64.3 pounds
7.8 US gallons of water, pure = 65.1 pounds
7.9 US gallons of water, pure = 65.9 pounds
8 US gallons of water, pure = 66.8 pounds
US gallons of water, pure to pounds
8 US gallons of water, pure = 66.8 pounds
8.1 US gallons of water, pure = 67.6 pounds
1/5 US gallons of water, pure = 68.4 pounds
8.3 US gallons of water, pure = 69.3 pounds
8.4 US gallons of water, pure = 70.1 pounds
1/2 US gallons of water, pure = 70.9 pounds
8.6 US gallons of water, pure = 71.8 pounds
8.7 US gallons of water, pure = 72.6 pounds
8.8 US gallons of water, pure = 73.4 pounds
8.9 US gallons of water, pure = 74.3 pounds

Note: some values may be rounded.

These tables contain the most frequently used vcf and mcf.

Volume UnitFactor to convert to m³ (vcf)
milliliter0.000001
UK fluid ounce0.0000284130625
US fluid ounce0.00002957352956
UK gallon0.00454609
US gallon0.003785411784
Mass UnitFactor to convert to kg (mcf)
milligram0.000001
gram0.001
tonne1000
pound0.45359237
ounce0.02834952313

### Disclaimer

While every effort is made to ensure the accuracy of the information provided on this website, neither this website nor its authors are responsible for any errors or omissions, or for the results obtained from the use of this information. All information in this site is provided “as is”, with no guarantee of completeness, accuracy, timeliness or of the results obtained from the use of this information.