# Units of Measure

## The category includes questions about the various ways in which humans measure objects or concepts. This category is also home to conversions between units such as grams to pounds or liters to milliliters.

###### Asked in Units of Measure

### How many feet are there in a statute mile?

There are 5,280 feet in a statute mile.
There are 5,280 feet in a US/UK mile.
This is also known as an American mile, British mile, Imperial
mile, English mile, or European mile. Its length has been agreed
and fixed at precisely 1,609.344 meters by legal
statute. Consequently it is also known as the 'statute mile.'
But there are also other types of 'mile.'
List of 'feet in a mile' in some of the more well-known systems
of linear measurement:
5,280 feet in a statute mile
6,080 feet in the UK nautical mile
6,080 feet in the aeronautical mile
6,076.1155 feet in the International nautical mile (1852
meters)
5,279.989 'US Survey feet' in a mile
5,920 feet in an old Scots mile
5,000 Roman feet in the old Roman mile
1500 m 'Metric mile' (used in sports) = 4,921.26 feet
1600 m 'Metric mile' (used in some school sports) = 5,249.34
feet
A 'Data mile' (used in radar) = 6,000 feet
For the number of feet in other 'miles', e.g. Irish, Danish,
German, Croatian, Russian and Banska miles/mil/meile/milya etc, see
Related links below.
5,280 feet

###### Asked in Units of Measure, Length and Distance

### What instrument measures length or distance?

It depends on the meaning of length. Typically it means a unit
of distance but it can also be applied to the passage of time, such
as the duration of a piece of music. Thus a time-piece, such as a
stopwatch, would be the instrument of choice when measuring a
length of time.
For units of distance, there are a huge number of instruments
available:
Calipers and micrometers
Rulers and meter or yard sticks or line gauges
tape measures,
surveyor's wheels,
micrometers,
rangefinders
laser rules.
Walking wheels
RADAR
SONAR
LIDAR
Which instrument you use largely depends on how accurate the
result needs to be (the tolerance), combined with the size of the
object or the distance being measured. Generally, the greater the
distance, the greater the tolerance.
Measuring tapes are more flexible than straightedge rulers and
can accurately measure much greater distances, typically up to 10m.
Today, they are made from cloth or fiberglass (such as a tailor's
measure) or from a stiff, curved metallic ribbon that can retract
into a coil (such as a carpenter's or constructor's measure).
Surveyor's tapes are often made from durable plastic or fiberglass
and allow more accurate measuring over much greater distances,
usually up to 100m or more.
Micrometers are used when measuring the size of distant objects.
Modern micrometers are often GPS-based systems used to perform
geodetic measurements.
Micrometers and calipers are generally used in engineering
applications where straightedge rulers would be impractical, such
as when measuring the diameter of a column or when measuring the
gauge of a threaded bolt.
Laser rulers are a new type of measuring device, designed to
specifically measure the distance to an object, where a laser beam
can be reflected back to the device. Handheld devices are generally
low-power devices so their accuracy is limited to within 100m or
so, but more powerful lasers can measure greater distances,
including the distance to the moon (where reflectors were
specifically placed during the moon landings in the late 60's and
early 70's).
In microscopes, there is commonly a glass slide marked with an
engraving that goes down to a few microns (micrometer
scale). The glass slide with the engraved lines is known as a
graticule or reticule).
To measure distance traveled, a pedometer is carried by walkers
to measure distance walked. An Odometer is fitted to vehicles,
including bicycles, to measure distances traveled (miles or
kilometers).
You may use a ruler.
Examples of common instruments used for measuring length are the
ruler, (for measuring milimeters, centimeters, inches, and 1 foot),
the yardstick, (which is 3 feet long, [36 inches], and measures
milimeters, centimeters, inches, and about 1 meter, {3.28084
feet}). There are also tape measurers that can measure all of the
previously listed measurements and vary on the longest length they
can measure. Units of length are based on feet or meters. Tools for
measuring length range from simple rulers to lasers. A ruler
I would say a ruler or a tape measure.

###### Asked in Science, Units of Measure, Weight and Mass, Atomic Mass

### What instrument measures mass?

Traditionally a balance was used to measure mass. Objects of
known or accepted mass was balanced against another object of
unknown mass. When the balance was level the two pans had the same
mass. The term balance or scales is still used even though there is
no balance used. The scales were the pans that the objects sat
on.
Now electronic balances are used that gauge the mass of the
objects. While you can measure mass with a spring loaded scale, it
is less accurate than a balance as it relies on a spring loaded to
a specific acceleration of gravity for any given mass. A change in
altitude will change the results given on the scale, due to the
actual change in gravitational force (it is small at only about
0.031% error for every kilometer increase in altitude)*. A balance
would experience no such change as the mass of an unknown quantity
is compared to the mass of a known quantity, thus negating any
effects of gravity.
Another instrument that measures mass is an inertial
balance. An inertial balance doesn't require gravity to work,
so it can be used in space. It measures the mass of an object by
attaching it to a spring and seeing how it affects the spring's
period of oscillation.
Very tiny masses can be measured directly (using a
"massometer"). But we normally use scales, which measure weight,
which is directly proportional to mass (a property of matter equal
to its resistance to a change in speed or direction of travel). The
mass of an object is the same everywhere in the universe. Its
weight, however, changes depending upon its location: a bowling
ball has greater weight on the surface of the Earth than it does on
the Moon. Great confusion arises when people interchange units of
weight with units of mass. Scientists, particularly physicists, are
very careful about not using the terms interchangeably, but regular
folks have no choice for practical applications. For example, when
you weigh a regulation ten-pin bowling ball, the scale will tell
you it "weighs" between 4 and 7 (3.63 to 7.27 actually) kilograms,
even though the kilogram is, technically speaking, a unit of mass,
not weight.
You can also measure the mass of an object using a scale, as
long as you factor in the gravitational constant (G). For instance,
in an environment with only 1/2 the gravity of That on earth, you
would have to double the weight displayed on the scale to
determine the actual mass. As an example, 10Kg of lead in a
0.5G environment would only "weigh" 5Kg on a scale...half as much
as on earth, even though its mass is unchanged.

###### 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 Units of Measure

### What is the name of the unit used to measure an electric current?

The ampere, often abbreviated to amp or
A.
It measures electrical current which is denoted in Ohm's Law as
"I".
The unit or instrument used to measure electric is called
"AMMETER"
More detail
The unit is named after the French physicist André Marie
Ampère.
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A current of 1A is equal to 1 coulomb of charge passing a point
in 1 second.
<><><>
The ampere is the unit of current. It is approximately 6.24 ×
1018 electrons passing a given point each second. See the
Related Link shown below for more detail. Ampere

###### Asked in Units of Measure, Cooking Measurements

### How many ounces are in 1 cup?

In the US, 1 cup = 8 fluid ounces (*not identical to the
avoirdupois ounce which is weight)
In the US, one standard measuring cup contains 8 fluid
ounces, but there is also a dry measure using the term cup,
equal to 8 ounces.
The UK cup is equal to 10 Imperial ounces, which are equal to
0.96 US ounces, because they are based on the avoirdupois (weight)
ounce.
This standard - as with standard spoon measurements - varies
from country to country. As well, ordinary coffee cups can vary
greatly in capacity, so standard measures depending on the country
of origin of a recipe should always be used, rather than those
mismatched cups no longer part of dinner sets, which sit in the
kitchen cupboard.
Fluid ounces are an volume measurement which is not the same as
the weight of an item. Volume measurements are how much of a
container is filled which is totally different to how much an item
weighs. A cup of chopped carrot will weigh more than a cup of
chopped marshmallow.
In many cases some variation in quantities doesn't matter at
all, but - especially in baking - the use of different size cups
for measuring can invite disaster. So use standard measures, and
check the country of origin of the recipe in case ther standard
measures are different.
8 ounces
8 ounces in a cup

###### Asked in Math and Arithmetic, Units of Measure, Cooking Measurements

### How many ounces make a gallon?

In a US gallon... 128 ounces
Both US gallons and "Imperial" (UK) gallons contain 8 pints -
but the US pint is 16 fluid ounces while the Imperial pint is 20
fluid ounces.
So if you're working in Imperial gallons the answer is 160 fluid
ounces.
It's quite a big difference so worth double-checking which units
you're supposed to be using!
To know the weight of a certain volume you need to know the
specific gravity of the fluid. In other words: the weight of one US
gallon of water is not the same as the weight of one US gallon of
gasoline.
1 gallon [US, liquid] = 128 ounce [US, liquid]
1 Imperial gallon = 160 Imperial fluid ounces
128 fluid ounces = 1 gal I'm happy to help =D

###### Asked in Units of Measure, Length and Distance

### How many centimetres are there in 8.5 inches?

21.59 centimeters.
Solution:
1. 2.54 centimeters = 1 inch. You can express this as the
fraction 2.54 cm / 1 inch (read aloud as "2.54 centimeters per
inch")
2. To convert 8.5 inches to centimeters, cancel the inches in
the numerator and denominator & multiple 2.54 * 8.5 = 21.59 cm
(see below. Note: Disregard the _ character. It is only included to
make the fractions align properly for easier viewing.
2.54 cm__8.5 inches___ 21.59 cm
--------- * ----------- = ----------- = 21.59 cm
1 inch_______1__________1

###### Asked in Units of Measure

### Convert 57 mm to cm?

###### Asked in Units of Measure, Cooking Measurements, Cakes

### One cup equals how many tablespoons?

1 cup = 16
tablespoons
More conversions:
1 gallon = 4 quarts
1 quart = 4 cups
1 quart = 2 pints
1 pint = 2 cups
1 cup = 8 ounces
1 cup = 48 teaspoons
12 tablespoons = ¾ cup
10 tablespoons = 5/8 cup
8 tablespoons = ½ cup
6 tablespoons = 3/8 cup
4 tablespoons = ¼ cup
2 tablespoons = 1/8 cup (1 ounce)
1 tablespoon = 1/16 cup
1 tablespoon = 1/2 ounce (16 dashes)
1 tablespoon = 3 teaspoons
1 teaspoon = 1/6 ounce (5-1/3 dashes)
1 dash = 1/32 ounce
Algebraic Steps / Dimensional Analysis Formula 1 c*16
tablespoons
1 c=16 tablespoons
1 cup = 16 tbsp
1 tbsp = 0.06 cup

###### Asked in Units of Measure

### How many meters are in a kilometer?

There are 1000 meters in a kilometer.
The prefix kilo- means "1000".
Examples:
kilogram is one thousand grams
kilohertz is one thousand oscillations per second
kilovolt is one thousand volts
kilobyte is roughly one thousand bytes of storage (used
because 210, or 1024, is the power of two closest to 1000 bytes: it
is easily close enough to one thousand, or one kilo-, for
describing computer storage in general terms).
kilometre is 1,000 metres, because kilo means thousand
1000 metres in a kilometre
1800 metres. 1km = 1000m.
There are 1000 meters in a kilometer
1000 m
1 Kilometer is equal to 1000 Meters.
The prefix "Kilo-" means 1000, or 10^3. It works the same
for other Metric "Bases"
1 Kilometer = 1000 Meters
1 Kilogram = 1000 Grams
1 kilowatt = 1000 watt
1000
there are 1000 meters in a kilometer.
There are 1000 meters in 1 kilometer
1km=1000m
1000 m= 1 km
1,000 meters = 1 kilometer

###### Asked in Math and Arithmetic, Units of Measure, Metric System

### What is the metric equivalent of a butt load?

Get a load of this...
There is an exact unit of volume called the butt.
See Webster's dictionary:
Butt: a measure of liquid capacity equal to 126 gallons or
two hogs heads.
From another dictionary:
An English butt is 2 hogshead of 54 imperial gallons each or
~129.7 US gallons (i.e., a UK butt is apparently slightly bigger
than a US one).
A Spanish butt is based on a wine cask and is equivalent to
140 US gallons or ~116.6 UK gallons (i.e., a Spanish butt is bigger
still).
So next time someone says they have a "butt load" of stuff, just
remember, that is about two 55-gallon barrels worth of stuff.
To recap...
1 butt equals:
2 hogsheads (this is probably the easiest to remember for
social occasions)
476.961 liters
126 gallons
104.917 UK gallons
13.5347 bushels
0.131592 cords
11.6574 firkins
4032 gills
21504 ponys
4032 noggins
1008 pints
96768 teaspoons
12.0308 ephahs
1.58987x10^7 drops
10752 jiggers
16128 shots
629.504 wine bottles
630 fifths
And the punchline...
One microbutt = 0.0968 teaspoons.