## Weight Measurement

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

#### Begin here

## 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.

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.

#### Related Worksheets

## 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**.

**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**.

## 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
**weight**on earth. - Earth weighs 81 times more than the moon.

## Solved Examples

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

**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

### Convert 4 pounds to ounces.

We know that 1 pound $= 16$ ounces

So, 4 pounds $= 4 \times 16$ ounces $= 64$ ounces

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

1 pound $= 16$ ounces

So, 32 ounces $= 32 \div 16 = 2$ pounds

### Convert 5 tons to pounds.

1 ton $= 2000$ pounds

So, 5 tons $= 5 \times 2000$ pounds $= 10000$ pounds

## Frequently Asked Questions

**What is the SI unit of weight?**

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)**.

**How can we measure weight?**

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.

**Which units do weighing scales employ to measure weight?**

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

**What are weights made up of?**

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

**What are the US Standard Units of weight?**

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