Converting between kilograms and grams, understanding that kilograms and grams are used for weighing food and other items.
Where your child meets this in real life: Reading weights on food packaging (e.g., 500 g bag of pasta, 1.5 kg chicken)
SEAGReady breaks convert mass units into 3 steps, taught in order so each skill builds on the last.
Convert whole numbers of kilograms to grams using multiplication by 1000 (e.g., 2 kg = 2000 g)
Convert whole numbers of grams to kilograms using division by 1000 (e.g., 3000 g = 3 kg)
Convert decimal kilogram values to grams (e.g., 2.5 kg = 2500 g) while correctly placing the decimal point
Three free sample questions from our convert mass units course. Every question comes with a full explanation, and hints that guide without giving the answer away.
Ciara is baking a cake and needs 2 kg of flour. How many grams of flour does she need?
Answer: A. 2000 g
Kilo means 1000, so 1 kg = 1000 g. To convert kg to g, multiply by 1000. 2 kg = 2 x 1000 = 2000 g
Stuck? Start here: What does 'kilo' mean? Think about how many grams are in 1 kilogram.
Declan bought a bag of rice weighing 4000 g. How many kilograms is this?
Answer: A. 4 kg
To convert g to kg, divide by 1000. 4000 g / 1000 = 4 kg The rice weighs 4 kg.
Stuck? Start here: You are converting from smaller units (g) to larger units (kg).
A recipe needs 1.5 kg of potatoes. How many grams is this?
Answer: C. 1500 g
To convert kg to g, multiply by 1000. 1.5 x 1000 = 1500 Move the decimal point 3 places to the right. 1.5 kg = 1500 g
Stuck? Start here: To convert kg to g, you multiply by 1000.
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Aoife is baking a cake and needs 3 kg of flour from a large bag.
How many grams of flour does she need?
3 kg = ? g
Step 1 of 4
Aoife is baking a cake and needs 3 kg of flour from a large bag.
How many grams of flour does she need?
Aoife needs 3000 g of flour.
The key insight: Kilo always means 1000, so just multiply by 1000 to convert kg to g!
Watch out: 3 kg = 300 g. Multiplying by 100 instead of 1000 - remember kilo means 1000, not 100.
These are the misconceptions we see most often in convert mass units, including the ones our practice questions are specifically designed to catch.
Struggling with convert mass units? The real gap is often in one of these earlier topics.
SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.