MeasurementP6 level17 questions in the full course

Convert Capacity UnitsSEAG Practice Questions

Converting between litres and millilitres using multiplication and division by 1000.

Where your child meets this in real life: Understanding drink bottle sizes (e.g., 500 ml = 0.5 litres)

What your child needs to know

In the SEAG test

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 capacity units into 2 steps, taught in order so each skill builds on the last.

  1. 1

    Litres to Millilitres

    Convert whole numbers of litres to millilitres using the 1 L = 1000 mL relationship

  2. 2

    Millilitres to Litres

    Convert millilitres to litres by dividing by 1000, including amounts that result in decimal litres (e.g., 500 mL = 0.5 L, 2500 mL = 2.5 L)

Try these SEAG-style questions

Try three free questions from our convert capacity 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.

Question 1Confidence builder

Jack's water amount is shown. How many millilitres is this?

A graduated measuring jug shows 2 litres of water and asks for the same amount in millilitres.
Answer choices for question 1
Question 2Standard

A bottle of fizzy drink contains 2000 mL. How many litres is this?

Answer choices for question 2
Question 3Stretch

Grace's lemonade and fruit-juice amounts are shown. How many millilitres of punch does she make altogether?

Two graduated measuring jugs show 5 litres of lemonade and 4 litres of fruit juice, with the total in millilitres unknown.
Answer choices for question 3

Try the lesson: Litres to Millilitres

This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.

Megan is making punch for a school party. The recipe needs 3 litres of lemonade.

How many millilitres of lemonade does she need?

3 L = ? mL

Recall the conversion fact
1

1 litre = 1000 millilitres

Step 1 of 4

Prefer to read? See every step written out

Megan is making punch for a school party. The recipe needs 3 litres of lemonade.

How many millilitres of lemonade does she need?

  1. 1

    Recall the conversion fact

    • 1 litre = 1000 millilitres
    • Milli- means one-thousandth, so there are 1000 mL in 1 L
  2. 2

    Multiply to convert

    • Multiply the litres by 10003 × 1000 = 3000
    • Write the answer with units3 L = 3000 mL

Megan needs 3000 mL of lemonade.

The key insight: Each litre adds 1000 millilitres - just multiply the number of litres by 1000!

Common mix-up: 3 L = 300 mL. There are 1000 mL in a litre, not 100. Milli- means thousandth, not hundredth.

Mistakes to watch for

These are the misconceptions we see most often in convert capacity units, including the ones our practice questions are specifically designed to catch.

  • Thinking there are 100 ml in a litre
  • Confusing capacity with volume of solid objects

Build these skills first

Struggling with convert capacity units? The real gap is often in one of these earlier topics.

More measurement practice

Sitting the SEAG test this November? Read our last-month revision plan, Paper 1 vs Paper 2 and test day guide.

17 questions on this topic alone

Master convert capacity units and everything it unlocks

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.

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