Converting between kilometres, metres, centimetres, and millimetres using multiplication and division by 10, 100, and 1000.
Where your child meets this in real life: Converting height from centimetres to metres (e.g., 175 cm = 1.75 m)
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 length units into 3 steps, taught in order so each skill builds on the last.
Convert between metres and centimetres using multiplication by 100 and division by 100
Convert between centimetres and millimetres using multiplication by 10 and division by 10
Convert between kilometres and metres using multiplication by 1000 and division by 1000
Try three free questions from our convert length 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.
Lewis's living-room length is shown. How many centimetres is this?
A pencil from the school shop is 15 cm long. How many millimetres is this?
Amara's two cycling distances are shown. What is the total distance in metres?
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Abigail is measuring her bedroom for new carpet. The room is 4 metres long.
How many centimetres is this?
4 m = ? cm
Centi means one hundredth, so 100 cm = 1 m
Step 1 of 4
Abigail is measuring her bedroom for new carpet. The room is 4 metres long.
How many centimetres is this?
Abigail's bedroom is 400 cm long.
The key insight: When converting to smaller units, the number gets bigger - more little pieces fit!
Common mix-up: 4 m = 4 cm (dividing instead of multiplying). Centimetres are smaller than metres, so you need MORE of them, not fewer.
These are the misconceptions we see most often in convert length units, including the ones our practice questions are specifically designed to catch.
Struggling with convert length 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