Weigh It, Pour It Class 4 Maths Chapter 8 CBSE Notes 2025-26

Measuring weight and capacity is an important concept introduced in this chapter for Class 4 students. In earlier classes, students learned about common items like a one kilogram salt packet or one litre water bottle.

This chapter goes further, helping students observe, estimate, and practically measure the weight of different objects, as well as the capacity of various containers. The focus is on understanding units like kilogram (kg), gram (g), litre (l), and millilitre (ml) through hands-on activities and day-to-day examples.

Children learn to compare weights by looking at pictures and real objects, such as animals or items in their homes. Questions like “Write the name of the heaviest object in your home” or “Do you carry your school bag with ease or effort?” make students relate measurement to everyday life. Such exercises help build skills in estimating and comparing weights.

In the activity at the vegetable market, children observe how sellers use balances to weigh vegetables. Tasks are included to estimate the weight of items like a half pumpkin and compare weights of bundles, e.g., “6 bananas” or “15 onions.” These emphasize estimation before using measurement tools.

Grams and kilograms are the main units of weight discussed. Students fill tables where they estimate whether fruits and vegetables are less or more than 1 kg, and then check the actual weight on a balance. Conversions are made clear: 1000 grams equals 1 kilogram. The chapter reinforces this with practical examples:

• 2 packets of 500 grams make 1 kg, so 500 g = ½ kg
• 4 packets of 250 grams make 1 kg, so 250 g = ¼ kg

Through questioning and fill-in-the-blank exercises, students learn to relate smaller weights to a kilogram and apply the concept in many contexts.

Learners explore balancing tasks, such as figuring out how many 250 g packets will equal one 500 g packet, and practice with pan balances. Another useful exercise is matching units to objects—for instance, measuring the weight of a pen in grams or a gas cylinder in kilograms.

Counting equivalent weights is reinforced with playful situations, such as determining how many 10 g erasers would match a packet weighing 50 g, or matching the number of erasers needed to equal the weight of soap or sugar. This develops both reasoning and calculation skills.

Box-packing activities invite students to apply their understanding. For example, if a sweet shop owner must pack 1 kg of sweets, students calculate how many 500 g, 250 g, 100 g, or 50 g boxes would be needed. These mini-problems not only improve subtraction and division skills but also show real-world relevance.

The chapter introduces different weighing machines used in daily life. Students are encouraged to interview parents about monthly household consumption—like how much atta, rice, pulses, or sugar their family uses. Such tasks connect maths to the home and promote awareness of quantities and consumption.

Children estimate and record objects around them that are easy or difficult to lift, making practical guesses about their weight. Additionally, they must calculate how many 1 kg packets make up 10 kg, 20 kg, and so on, reinforcing division and multiplication processes:

• 10 kg has 10 packets of 1 kg each, 20 kg has 20 packets, etc.

Matching tables provide estimated weights of common objects, such as a pen (10–15 g), a cat (3–5 kg), a tiger (150–300 kg), and an elephant (over 1000 kg).

As a motivation, the chapter highlights Mirabai Chanu, the Olympic medal-winning weightlifter, who lifted a total of 202 kg in the Women’s 49 kg category—a great example to relate to the topic.

Moving to capacity, the concept of measuring how much a container can hold is introduced. Practical activities involve identifying bottles or vessels that hold less than 1 litre, exactly 1 litre, or more. Students collect bottles of 500 ml, 250 ml, 100 ml, 50 ml, and 10 ml and pour them into a 1 litre bottle to check understanding of the equivalence.

Key units such as litre (l) and millilitre (ml) are introduced, with 1000 ml equaling 1 litre. Conversions are practised in everyday ways:

• 500 ml = ½ litre, so two 500 ml bottles fill a litre container
• 250 ml = ¼ litre, so four 250 ml bottles fill a litre
• Students also work out how many 100 ml bottles will fill a 1 litre bottle (10 bottles)

Children use dosing cups and droppers to measure smaller quantities, figuring out, for example, how many 10 ml cups fill a 100 ml bottle, or how many 1 ml droppers fill a teaspoon. Comparing activities get students to estimate and then actually measure capacities for household objects like water bottles, glasses, mugs, jugs, buckets, teaspoons, and bowls.

The teaching method emphasizes both estimation and practical verification, encouraging students to use items from their kitchen for hands-on learning.

Students are prompted to think about their daily water usage (e.g., “How many litres of water do you drink in a day?”) and to compare their usage with others. List-making exercises include noting down how much water is used for everyday activities, from taking a shower to watering crops. Water conservation is brought into focus by asking students to observe a leaking tap, collect the wasted water, and calculate the total wasted over time. This strengthens awareness of responsible usage.

The chapter also covers containers used for measuring milk and other liquids, in measures like 50 ml, 100 ml, 200 ml, 500 ml, and 1000 ml, making sure students recognize practical measuring tools.

• Weight is measured in grams (g) and kilograms (kg); 1000g = 1kg.
• Capacity is measured in millilitres (ml) and litres (l); 1000 ml = 1 l.
• Estimating, comparing, and calculating weights and capacities develops practical maths skills.
• Students gain confidence in conversions: 500 g = ½ kg, 250 g = ¼ kg, 500 ml = ½ l, 250 ml = ¼ l.
• Hands-on practice with real-life objects helps in better understanding.
• Awareness of water conservation connects maths to social responsibility.

Through observation, discussion, estimation, calculation, and using local examples, this chapter helps students become more comfortable and skilled in measuring weight and capacity in daily life.

Class 4 Maths Chapter 8 Notes – Measuring Weight and Capacity: Key Revision Points

These Class 4 Maths Chapter 8 Notes cover all important points for “Measuring Weight and Capacity.” You’ll find clear explanations of units like kilogram, gram, litre, and millilitre, as well as everyday examples and simple activities. Use these concise revision notes to help understand weight and capacity with ease.

These revision notes provide step-by-step practice, estimation exercises, and matching tables for fast learning. Perfect for exam preparation, students gain confidence in conversions and learn the value of careful measuring in daily life.