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)
Each SEAG paper has 28 maths questions. Questions 29 to 50 are multiple choice with five possible answers, and questions 51 to 56 need a short written answer. With 56 questions in 60 minutes across English and maths, that is about a minute per question.
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) using place value
Try three free questions from our convert mass units course. They start easy and get harder, so you can see where your child's confidence runs out. If they manage the last one without a hint, this topic is probably secure. If not, the steps above show where to start.
Poppy's flour mass is shown. How many grams does she need?
Ella's suitcase weighs 8000 g before her trip. The airline limit is in kilograms. How many kg does her suitcase weigh?
Alfie's meat masses are shown. What is their total mass in grams?
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Lucy 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
Kilo means 1000
Step 1 of 4
Lucy is baking a cake and needs 3 kg of flour from a large bag.
How many grams of flour does she need?
Lucy needs 3000 g of flour.
The key insight: Kilo always means 1000, so just multiply by 1000 to convert kg to g!
Common mix-up: 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.
Sitting the SEAG test this November? Read our last-month revision plan, Paper 1 vs Paper 2 and test day guide.
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.
Free to start · no card needed