Weight Measurement – Definition With Examples

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Weight Measurement

Do you know your weight? Well, we measure our weights using a weighing machine. It looks something like this:

Digital weighing machine

What is Weight Measurement?

Weight determines how heavy an object or quantity of a substance is. A body with more weight is considered heavy, like an elephant or a bus. On the other hand, a body of less weight is called light. A feather, a leaf, and a bubble are all light in weight. We can also compare two or more objects and determine which is heavier or lighter.

Example to illustrate weight depends on the size

For instance, the adult dog in the picture is heavier in terms of weight. And the cute little puppy is lighter.

We have different weighing machines or scales to determine the weights of different things. The weight of an object can be measured using different types of weighing scales. A scale or balance is a device used to measure weight or mass. These are also known as mass scales, weight measurement scales, mass balances, and weight balances.

Weight measurement tools

Units of Weight Measurement

Metric Units of Weight Measurement

Using instruments, the gram (g) and kilogram (kg) measure how heavy an object is. The International System of Units (SI) is the metric system used universally as a standard for measurements. The SI unit of mass (or weight) is the kilogram (kg). When we buy groceries, they are measured in weight units such as grams and kilograms.

Gram: A gram is a metric unit of mass (or weight). It is abbreviated as g.

1,000 grams $= 1$ kilogram

Kilogram: A kilogram is a measure of mass (or weight). It is abbreviated as kg.

1 kg $=$ 1000 grams

 Here is a chart used for the conversion of metric units of weight.

Conversion formula for converting kilograms to grams

Customary Units of Weight Measurement

This is the US Standard Unit (English Unit or Customary Unit). The US customary units for measuring weight are ounces, pounds, and tons.

Ounce: An ounce is an imperial measure of weight. It is abbreviated as oz. An ounce is equivalent to 28.35 grams.

Also, 16 ounces $= 1$ pound

Pound: A pound is an imperial unit of mass (or weight). It is abbreviated as lb. A pound is defined as 0.454 kg.

Also, 1 pound $= 16$ ounces

Fun Fact about Pounds: “lb” is an abbreviation for the Latin word libra, the seventh sign of the zodiac symbolized by scales.

Ton: A ton is a standard unit for measuring mass (or weight). 

1 ton $= 1000$ kg

Also, 1 ton $= 2000$ pounds

Here is a chart that is used for the conversion of customary units of weight.

Conversion formulas for standard units of weight measurement

Fun Facts!

  • The weight of an object can vary as per its geographical location on Earth. This is because gravity is weaker in certain locations.
  • A person standing at sea level weighs slightly more than they would on top of a mountain peak. 
  • An object or person on the moon would weigh 16.5% of its weight on earth.
  • Earth weighs 81 times more than the moon.

Solved Examples

 1. Which is heavier, a football or a baseball?

Illustration of the dependency of weight measurement on size of object

Solution: A football.

A football is heavier than a baseball. This is because football has more weight.

2. Convert 8 pounds to ounces.

Solution:

We know that 1 pound $= 16$ ounces

So, 8 pounds $= 8 \times 16$ ounces $= 128$ ounces

Therefore, 8 pounds $=128$ ounces.

3. Convert 12 tons to kg.

Solution:

We know that 1 ton $= 1000$ kg

So, 12 tons $= 12 \times 1000$ kg $= 12,000$ kg

Practice Problems

Weight Measurement - Definition With Examples

Attend this quiz & Test your knowledge.

1

Convert 4 pounds to ounces.

62 ounces
64 ounces
2 ounces
32 ounces
CorrectIncorrect
Correct answer is: 64 ounces
We know that 1 pound $= 16$ ounces
So, 4 pounds $= 4 \times 16$ ounces $= 64$ ounces
2

Rachel has 32 ounces of butter. Help her calculate how much it weighs in pounds.

2 pounds
8 pounds
6 pounds
4 pounds
CorrectIncorrect
Correct answer is: 2 pounds
1 pound $= 16$ ounces
So, 32 ounces $= 32 \div 16 = 2$ pounds
3

Convert 5 tons to pounds.

2000 pounds
5000 pounds
10,000 pounds
20,000 pounds
CorrectIncorrect
Correct answer is: 10,000 pounds
1 ton $= 2000$ pounds
So, 5 tons $= 5 \times 2000$ pounds $= 10000$ pounds

Frequently Asked Questions

The International System of Units (SI) is the metric system used universally as a standard for measurements. The SI unit of mass is the kilogram (kg).

The weight of an object can be measured using different types of weighing scales. A scale or balance is a device used to measure weight or mass. These are also known as mass scales, weight scales, mass balances, and weight balances.

Weighing scales use standard units such as milligrams, grams, and kilograms to measure the weight of different objects.

A weight is a piece of metal known to weigh a definite amount. Nowadays, weights are available in plastic and various other materials.

The US Standard Units or the Customary System measures weight or mass in ounces, pounds, and tons.