Using the scale to convert a measurement on a drawing to the real-life measurement (e.g., 5 cm at 1:50 = 250 cm = 2.5 m).
Where your child meets this in real life: Finding the actual size of a room from an estate agent's floor plan
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 calculate real-life measurements into 3 steps, taught in order so each skill builds on the last.
Multiply a whole-number drawing measurement by the scale factor to find the real measurement in centimetres
Calculate the real measurement and convert the answer from centimetres to metres
Calculate real measurements when the drawing measurement includes decimals (e.g., 3.5 cm)
Try three free questions from our calculate real-life measurements 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.
The floor plan shows a civic-centre hallway. What is its real length?
Sam uses the floor plan shown. What is the real length of the corridor in metres?
The shop drawing shows a counter and a display cabinet. What is their total real length in metres?
This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.
Ben is looking at a floor plan of his new school. The map has a scale of 1:50.
A corridor measures 4 cm on the plan. What is the real length of the corridor?
4 × 50
Scale 1:50 means 1 cm on the drawing = 50 cm in real life
Step 1 of 4
Ben is looking at a floor plan of his new school. The map has a scale of 1:50.
A corridor measures 4 cm on the plan. What is the real length of the corridor?
The corridor is 200 cm long in real life.
The key insight: Scale drawings are SMALLER than real life, so multiply to find the real size!
Common mix-up: 4 ÷ 50 = 0.08 cm. Dividing makes it smaller, but real life is BIGGER than the drawing.
These are the misconceptions we see most often in calculate real-life measurements, including the ones our practice questions are specifically designed to catch.
Struggling with calculate real-life measurements? 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