# Volume

## Questions about the various units and conversions of volume. This category is also home to questions which ask the volume of certain objects given length, width, and height.

###### Asked in Cooking Measurements, Volume

### How many cups are in a gallon?

1 US gallon = 16 US Cups (exact) = 15.14 Metric cups
1 Imperial Gallon = 19.215 US cups = 18.18 Metric cups
Ans 2
I would agree totally on your US measurement, but in the rest of
the world, a 'cup' is a nebulous amount and I think depends on
which country you are in.
In UK, a cup is half of an Imperial pint. I cannot find a
'metric cup' defined anywhere with authority, and your amounts
specified above make it exactly half a litre - (that's a very large
cup). This entire issue is further complicated by the usage of
'liquid'cups and 'dry volume' cups, and the use of ISU or SI
(International System of Units) in some countries instead of
'original'Metric.
A very confusing issue indeed!
1 gal = 16 cups
1 cup = 0.06 gal
1 gallon = 16 cups
1 cup =0.23 gallon

###### Asked in Volume

### How many milliliters are in 1 liter?

There are 1000 milliliters in a liter
This is because milli in the SI system means a thousandth
(1/1000) or 0.001 (of a liter).
To convert from liters to ml, multiply by 1000;
To convert from milliliters to liters, divide by 1000.
Other prefixes are listed below.
10^12 - Tera
10^9 - Giga
10^6 - Mega
10^3 - Kilo
10 - Unit
10^-1 - deci
10^-2 - centi
10^-3 - milli
10^-6 - micro
10^-9 - nano
10^-12 - pico
1 litre=1000 millilitres

###### Asked in Math and Arithmetic, Units of Measure, Volume

### How many liters are in one gallon?

1 US gallon = 3.785411784
liters.
1 Imperial (UK) gallon = 4.54609188
liters.
1 liter = 0.26417205 US gallons
1 liter = 0.21996919 Imperial (UK) gallons
Conversion to other units:
1 gallon [US, liquid] = 4 US quarts exactly
0.133681 ft3 and
128.000 fluid ounces and
0.003785 m3 and
3785.411 cm3 and
3785.411 ml
Note that a liter is constant across the world, so a US liter =
a UK, British, English, Canadian, Indian, Chinese, etc... liter.
3.785 liters per gallon.

###### Asked in Math and Arithmetic, Volume

### How are volume units related to length?

Here's all you need to know to convert between volumes (i.e. m^3
to cm^3).
Volume is distance x distance x distance. Any formula you think
about. Cube=L^3 or LxWxH, sphere is 4/3 pi x r^3 (r is distance),
cylinder = pi x r^2 x L (r x 2 and L).
Why is this? because volume extends to the 3rd dimension.
What used confuse me was when my maths teacher said that there
were 1,000,000 cm^3 in a metre cubed. I knew that 100cm were in a
metre but it confused me passed this. Thing is, that difference
becomes cubed due to it being 3rd dimension. i.e. the difference is
actually 100x100x100, i.e. 1 million.
Some other things to remember. 1 cm^3 is the same as 1
millilitre. cc actually means centimetre cubed, i.e. cm^3. As milli
means 1 thousandth there are 1000ml in a litre, therefore 1000cm^3
in a litre.
By definition, 1 cubic centimeter (cc or cm3) = 1 milliliter
= 1 mL = 1/1000 L. ("Milli" means 1/1000th.) In this way,
a standard unit of length, the meter, is directly related to a
standard unit of volume, the litre.
Thus, there are 1000 mL in a Litre, and that means that one
cubic meter = 1000 L x 1000 mL/L = 1,000,000 mL = 1,000,000 cc (or
exactly 1x106 cc), NOT 1000 cc as the previous
contributor stated.
When the previous contributor wrote about a cube, he should
have been more clear and wrote: "In the special case of a cube,
volume = (length of any side of the cube)3 since
all sides of a cube are of equal length."
In my opinion, the remainder of what the previous
contributor wrote is correct and is a good description.
If you are asking about the standard units of measure used, 1
liter is exactly 1000 cubic centimeters, and one US liquid gallon
is exactly 231 cubic inches.
If you are asking about calculating volume, that can be
determined from length measurements.
In the special case of a cube, volume = length3.
.
In all other regular objects with straight sides (prism,
pyramid, etc.) the volume will have a relationship to the length of
any particular object that depends upon the geometry of the shape.
In a rectangular prism, such as a shoe box, the volume is directly
proportional to the length of any single dimension.
.
For spherical shapes, the volume is 4/3 pi r3, where r is the
length of the radius.
For other shapes, the volume formula may be more complicated,
and for irregular shapes, the volume may have to be estimated.
.
Some irregular shapes' volumes cannot be estimated or measured
by length. The volume of a daisy flower, for example, can not
readily be measured by conventional length measurements because the
shape of the object (all those petals, stamen, stigma, filaments,
and sepals, not to mention the stem, leaves, and roots) make it too
difficult to calculate the volume by measure straight lengths.
Other methods are required to measure the volumes of such irregular
objects, including liquid displacement or three dimensional surface
scanning or tomography.

###### Asked in Math and Arithmetic, Volume

### Why is milk measure in gallons and not by liter?

We all use basic arithmetic (+ - / *) in everyday life, and reading powers and scientific notation is useful for things like programming and reading some national geographic magazines and what not. The Pythagorean theorem is useful for some things.
But I don’t understand how quadratic equations, calculus, radical expressions, sequences/series, and imaginary and complex numbers are used in everyday life.
What are some REAL, USEFUL applications of these things?

###### Asked in Math and Arithmetic, Units of Measure, Volume, Weight and Mass

### How do you convert litres into pounds?

There is no equivalence.
A pound 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
pounds? Next consider a litre of water. How many pounds?
The masses of equal volumes of the two substances will clearly
be very different.
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.
If you can find the density of the substance (grams) then to
convert the amount of litres to pounds:
Convert it to kilograms to maintain the same unit
Multiply the number of kilograms by 2.20462 (pounds/
kilogram)
The result will be the amount of litres of the substance in
kilograms

###### Asked in Math and Arithmetic, Area, Volume

### How many cubic feet are in a gallon?

Gallons per
cubic foot
1 cubic foot = 7.4805 US gallons
1 cubic foot -=6.2288 Imperial gallons
One cubic foot is equal to 7.4805 US Gallons, -6.2288 Imperial
Gallons
Also,
1 cubic foot = 1728 cubic inches
1 US gallon = 231 cubic inches (by definition)
1 cubic foot = 1728/231 gallons = 576/77 gallons ~= 7.48
gallons
1 US gallon = 231/1728 cubic feet ~= 0.133681 cubic feet
Sample Water Bill Calculation
Assumptions:
Note: . This refers to 100 cubic feet. If your
bill says you used 10 ccf, that would be 1000 cubic feet, or almost
7500 US gallons.
Also: "Water bills" can also include other costs such as sewer and
trash collection. Read your bill closely to determine exactly what
you're paying for.