This guide supports the measurement of weight worksheet for Class 3 on this page. It covers what weight is, heavy and light, the units gram and kilogram, how to weigh things with a balance and a kitchen scale, comparing weights, finding the difference in weight, changing kilograms to grams and grams to kilograms, adding and subtracting weights, estimating weights and weight word problems. It follows the Class 3 maths measurement chapter taught in CBSE and NCERT style classrooms. Use it with the printable weight worksheet for Class 3 PDF, the Weight Class 3 quiz and the 15 Weight Class 3 activities above.

Weight Class 3 resources on this page

• Weight worksheet for Class 3: a printable PDF with kilogram and gram questions, comparing weights, differences, conversions and answers.
• Weight Class 3 quiz: a free 20-question online quiz with easy, average and thinking questions, balance and scale diagrams and instant marks.
• Weight Class 3 activities: 15 free online activities, made of 5 games, 5 workshops and 5 challenges, with marks and a comment after the challenges.
• Kilogram and gram Class 3 practice: units of weight, scales, balances and conversions in one place.

What is weight?

Weight tells us how heavy or light something is. A feather is light and a brick is heavy. We measure weight with a balance or a weighing scale.

Units of weight: gram and kilogram

The small unit of weight is the gram, written g. The big unit is the kilogram, written kg. We weigh light things such as a pencil, a coin or a paper clip in grams. We weigh heavy things such as a bag of rice, a watermelon or a school bag in kilograms. A shopkeeper often says kilo for kilogram.

Weighing with a balance

A balance has two pans. Put the object in one pan and weights in the other. If the pans are level, the object and the weights weigh the same. The pan that goes down holds the heavier side.

Reading a kitchen scale

A kitchen scale has a dial with numbers and a needle. Find the last number the needle has passed. If the needle is halfway to the next number, add 500 g. A needle halfway between 2 and 3 shows 2 kg 500 g.

Comparing weights

To compare two weights, write them in the same unit. 900 g and 1 kg cannot be compared until you change 1 kg to 1000 g. Then 900 g is lighter than 1000 g. Use the signs greater than, less than and equal to.

Finding the difference in weight

Subtract the lighter weight from the heavier weight. If a calf weighs 9 kg and a puppy weighs 6 kg, the calf is 9 kg − 6 kg = 3 kg heavier.

Changing kilograms to grams and grams to kilograms

To change kilograms to grams, multiply by 1000. So 3 kg = 3 × 1000 = 3000 g. To change grams to kilograms, find how many thousands there are. So 4500 g = 4000 g + 500 g = 4 kg 500 g.

Adding and subtracting weights

Add or subtract kilograms with kilograms and grams with grams. If the units are mixed, change everything to grams first. 1 kg 300 g + 2 kg 200 g = 1300 g + 2200 g = 3500 g = 3 kg 500 g.

Estimating weights

Estimating means making a sensible guess. A paper clip is about 1 g. A pencil is about 5 g. A bottle of water is about 1 kg. A school bag is a few kilograms. Compare with something you know before you guess.

Weight word problems

Read the story and find the weights. Decide whether to add, subtract or multiply. Change to the same unit and write the answer with its unit. If 4 packets weigh 250 g each, the total is 4 × 250 g = 1000 g, which is 1 kg.

Solved examples

Common mistakes

Weight in daily life

Weight is everywhere: vegetables at the market, a bag of atta, a packet of biscuits, a baby’s weight, a parcel at the post office and ingredients in a recipe. Let your child weigh things at home and read the scale aloud.

What your child learns from the weight worksheet for Class 3, the Weight Class 3 quiz and Weight Class 3 activities

• Heavy, light and equal weights
• Units gram and kilogram
• Reading a balance and a kitchen scale
• Comparing weights and finding the difference
• Changing between kilograms and grams
• Adding and subtracting weights
• Estimating the weight of everyday objects
• Weight word problems

Tips for parents and teachers

Use a kitchen scale or a simple balance at home. Let your child guess the weight first and then check. Say the units aloud every time. Use the printable PDF worksheet for written practice and the online activities for quick revision. Revisit the common mistakes table when you see the same error twice.