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.

189,250 Questions
Units of Measure
The Difference Between

What are the difference between single pan balance and double pan balance?

Difference (subtraction) = 1 pan

Units of Measure
Weight and Mass
Atomic Mass

What instrument measures mass?

A Beam balance (or Beam scale) is a device to measure weight or mass.

Units of Measure
Cooking Measurements

1 cup mayo equals how many ounces?

1 US cup mayo = 8.11 ( 8 1/8 ) ounces
Math and Arithmetic
Units of Measure
Cooking Measurements

How many pints are in one quart?

Two pints equal one quart.

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

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

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.

Units of Measure

How many centimeters are in an inch?

2.54 cm are there in an inch

Math and Arithmetic
Units of Measure

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.

Units of Measure

Which is greater 1500 mL or 1.5 L?

They are the same. There are 1000 milliliter in one liter. Therefore, 1500 milliliter is equal to 1500/1000 = 1.5 liters.

The two units are therefore the same.

Math and Arithmetic
Units of Measure

How many cm3s are in one liter?

1000cc is in one litre
1 litre is 1000 millilitres.
1 millilitre is 1 cubic centimetre.
1 litre is 1000 cubic centimetres.

Math and Arithmetic
Units of Measure
Length and Distance

How many feet are there in a mile?


Units of Measure
Length and Distance

How many miles are equal to 5 kilometers?

5 km is exactly 3.10685596 miles (don't forget that extra .00685596 of a mile, it could cost you the race).

That comes out to be 3 miles + 564 feet + 2.4 inches.

Aging and Life Extension
Units of Measure
Weight and Mass

How much is 150 pounds in kilogram?

150 pounds is equal to 68.0388555 Kilograms.

1 Pound = 0.45359237 Kilograms

150 Pounds * 0.45359237 Kilograms = 68.0388555 Kilograms.

Algebraic Steps / Dimensional Analysis Formula 150 lb*1 kg

2.2046 lb=68.0388555 kg

Units of Measure

Is 96 fluid ounces greater or less than 13 cups?

96 fluid ounces is less than 13 cups.

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

Units of Measure
Cooking Measurements

How many milliliters are in one ounce?

The US food labelling fluid ounce has 30 mL. Ounce is not a SI unit.

Dieting and Weight Loss
Units of Measure

How Many Glasses Of Water In 600ml Bottle?

none it's a bottle

Meteorology and Weather
Units of Measure
Measuring Tools

What instrument measures wind speed?

An anemometer or windmeter is the device that measures wind speed. They are usually divided into those that measure the wind's speed and it's pressure. The first known anemometer was described in 1450 by Leon Battista Alberti.

Units of Measure

How many square feet are in an acre?

1 acre = 43,560 square feet. An acre is defined as one furlong (660 feet) by one chain (66 feet).
1 acre = 43,560 square feet of area

But the area doesn't tell you its shape or dimensions.

on converting :

1 sq ft = 2.285 X10-5

Units of Measure

Which is greater 3 miles or 5000 yards?

5,000 yards

Units of Measure

How many ounces are in a gallon?

1 gallon [US, liquid] = 128 ounce [US, liquid]

1 Imperial gallon = 160 Imperial fluid ounces

Units of Measure

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


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

Units of Measure

How many pounds are in 70 kilograms?

1 kilogram is a little over 2.2 pounds.

63 kilograms is equal to 154.3 pounds.

Units of Measure
Length and Distance

How many centimetres are there in 8.5 inches?

21.59 centimeters.


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


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