Learn about Measurements – Definition, Standard Units of measurement!

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Let’s start with the definition of Measurement

The idea of measurement is calculating a numerical value, that shows the size or amount of any physical quantity.

The collection of units of measurement is called the system of measurement. Metric System and US Standard Units are mainly used systems of measurement.

Metric System:

The metric system has three main systems of units. Meter for length, kg for mass, and seconds for time.

The following table lists some units of the Metric System.






Milliliters (mL)

Grams (g)

Centimeters (cm)


Liters (L)

Kilograms (kg)

Meters (m)



Tonnes (t)

Kilometers (km)



US Standard Units:

The US Standard Units are mostly used in the United States. However, in the field of science and engineering, SI units are commonly used, which is derived from Metric Systems.

The following table shows some US Standard Units.






Fluid Ounces (fl oz)

Ounces (oz)

Inches (in)


Pints (p)

Pounds (lb)

Feet (ft)


Quart (qt)

Tons (t)

Yards (yd)


Gallon (gal)


Miles (mi)



Some Common Conversion Factors:

Metric Units

US Standard Units

1 meter

3.281 feet, or 1.093 yards

1 kilogram

2.205 pounds

1 liter

1.057 quart, or 0.264 gallon



Practice Problems on Converting Standard Units of Measurement:

Question:1 Convert 10 meters in feet.

(a) 10.93 ft

(b) 30 ft

(c) 32.81 ft

(d) 393.72 ft

Correct Option: (c)

Explanation: The conversion factor is

Using the conversion factor, .

 Final answer: 10 meters is equal to 32.81 feet.

Question:2 Convert 50 pounds in kilograms.

(a) 110.25 kg

(b) 92 kg

(c) 25 kg

(d) 22.68 kg

Correct Option: (d)

Explanation: The conversion factor is


We could rewrite it as .

Final answer: 50 pounds is equal to 22.67 kilograms.

Question:3 Convert 56.78 liters in gallon. Round your answer to the nearest whole number. 

(a) 215 gal

(b) 15 gal

(c) 200 gal

(d) 6 gal

Correct Option: (b)

Explanation: The conversion factor is

Now, using the conversion factor:


Final answer: 56.78 liters would be approximately equal to 15 gallons.


Need Homework Help with Measurement Questions


Imagine your day-to-day routine and see how many times we use measurements in a day. You will be surprised to learn how our daily life is dependent on measurements. Everything around us can be pretty much measured. For Example, when you go to a store to buy a bag of oranges, then you look at the price of the bag something like $5 and the weight of the oranges as 2 lbs. Then when you proceed towards the billing desk and wait in the line, you measure the length of the line, the time it will take to reach the billing desk etc. Even driving back to your house, you calculate the temperature outside, the speed at which you need to drive on the road and so on. So, you see now, how everything pretty much around us is measurable. We can measure so many different things around us and most commonly we measure things by their length. their area, volume, capacity, and time it will take us to perform an activity.

Hence, different units of measurement are used for different things such as weight is measured in lbs or pounds whereas length is measured in centimeters, meters, inches etc. So it is very important to know how they are constructed, compared, and converted. 

There are two standard units of measurement. In, United States, we use U.S. Standard Units for measurement such as miles, pounds, and degrees Fahrenheit. The rest of the world uses the metric system for measuring things such as Kilometers, Kilograms, and degrees Celsius. The metric system was first proposed by the French astronomer /mathematician Gabriel Mouton in 1670 and later in 1790s it was standardized in Republican France.

Measurements as a topic are therefore very important for middle and high school students and can be considered as building blocks for solving with advanced math problems later in life.  

Measurement Homework Help is available at TutorEye 24/7 and we can help you get a strong foundation on how to convert standard units of measurement, perform basic operations using measurements. 

Our expert tutors are there to guide and help students with their homework questions related to measurements in math. We provide detailed step by step solutions to homework questions.

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