Measuring Weight (Grade 2)
Measuring weight means finding out how heavy or light an object is. In Class 2, we learn to use standard units like kilograms (kg) and grams (g) to measure weight.
We use a weighing scale or a balance to find the weight of things. Knowing the weight helps us in cooking, shopping, and daily life.
What is Measuring Weight - Class 2 Maths (Measurement (Grade 2))?
Weight tells us how heavy an object is.
- Kilogram (kg) — used for heavy things like a bag of rice, a watermelon, or a person
- Gram (g) — used for light things like a biscuit, a feather, or a coin
1 kilogram = 1000 grams
Measuring Weight (Grade 2) Formula
How to measure weight:
- Place the object on a weighing scale
- Read the number shown on the scale
- Write the weight with the correct unit (kg or g)
Balance scale: Place the object on one side and known weights on the other side. When both sides are level, the known weights equal the weight of the object.
Solved Examples
Example 1: Example 1: Weighing Mangoes
Question: Ria puts a bag of mangoes on a scale. The scale shows 2 kg. How heavy are the mangoes?
Think:
- The scale shows 2 kg
- So the mangoes weigh 2 kilograms
Answer: The mangoes weigh 2 kg.
Example 2: Example 2: Converting kg to g
Question: A packet of sugar weighs 1 kg. How many grams is that?
Think:
- 1 kg = 1000 g
Answer: The sugar weighs 1000 grams.
Example 3: Example 3: Choosing the Right Unit
Question: Would you measure a chapati in kg or g?
Think:
- A chapati is very light
- It weighs about 30 to 40 grams
- Grams are better for light objects
Answer: We measure a chapati in grams (g).
Example 4: Example 4: Using a Balance
Question: Aman places a book on one side of a balance. He puts a 500 g weight on the other side. The balance is level. How heavy is the book?
Think:
- When both sides are level, they weigh the same
- The weight on one side = 500 g
Answer: The book weighs 500 g.
Example 5: Example 5: Adding Weights
Question: Priya buys 2 kg of rice and 3 kg of wheat. What is the total weight?
Think:
- Rice = 2 kg
- Wheat = 3 kg
- Total = 2 + 3 = 5 kg
Answer: The total weight is 5 kg.
Example 6: Example 6: Converting Larger Values
Question: A watermelon weighs 3 kg. How many grams is that?
Think:
- 1 kg = 1000 g
- 3 kg = 3 × 1000 = 3000 g
Answer: The watermelon weighs 3000 grams.
Example 7: Example 7: Estimating Weight
Question: Dev picks up a cricket ball and guesses it weighs about 200 g. The actual weight is 160 g. Was his guess close?
Think:
- Guess = 200 g
- Actual = 160 g
- Difference = 200 − 160 = 40 g
Answer: Dev's guess was fairly close. He was off by 40 g.
Key Points to Remember
- Weight tells us how heavy or light an object is.
- We use kilograms (kg) for heavy things and grams (g) for light things.
- 1 kilogram = 1000 grams.
- A weighing scale or balance is used to measure weight.
- On a balance, when both sides are level, the weights on both sides are equal.
- Estimate the weight first, then measure to check your guess.
Practice Problems
- A bag of apples weighs 3 kg. How many grams is that?
- Would you use kg or g to measure the weight of a pencil?
- Meera buys 1 kg of dal and 2 kg of rice. What is the total weight?
- An egg weighs about 50 g. How much do 4 eggs weigh?
- Rahul picks up his school bag. It feels heavy. Would it weigh about 5 g or 5 kg?
- A packet of biscuits weighs 200 g. How many packets make 1 kg?
Frequently Asked Questions
Q1. What is weight?
Weight tells us how heavy or light an object is. We measure weight using grams or kilograms.
Q2. What is the difference between kg and g?
Kilogram (kg) is used for heavy things like rice bags and watermelons. Gram (g) is used for light things like coins and biscuits. 1 kg = 1000 g.
Q3. How does a balance scale work?
Put the object on one side and known weights on the other side. When both sides are at the same level, the object weighs the same as the known weights.
Q4. How many grams are in 1 kilogram?
There are 1000 grams in 1 kilogram.
Q5. What weighs about 1 kg?
A packet of sugar, a litre bottle of water, or about 4 medium apples weigh roughly 1 kg.
Q6. Why do we measure weight?
We measure weight when cooking (recipes need exact amounts), shopping (buying fruits, vegetables by weight), and in science experiments.
Q7. Can we weigh very light things in kg?
It is better to use grams for light things. A feather or a coin is so light that using kg would give a very small number that is hard to read.
