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Maths Quiz - Level 3-4 Shapes - Imperial and Metric (Questions)

Compare imperial and metric units. Practise converting lengths, masses, and capacities using clear steps and smart conversion factors so mental maths stays quick, accurate, and reliable.

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Fascinating Fact:

In the imperial system, converting units can be trickier, since 16 ounces make a pound and 14 pounds make a stone.

In KS3 Maths, you compare imperial and metric units and convert between them. You will meet common pairs such as inches to centimetres, miles to kilometres, and pints to litres, then choose sensible methods for real problems.

Key Terms

Imperial units: Older units used in the UK and USA, for example inches, feet, miles, ounces, and pints.
Metric units: Decimal units based on tens, for example millimetres, centimetres, metres, kilometres, grams, and litres.
Conversion factor: A number you multiply or divide by to change from one unit to another.

Frequently Asked Questions (Click to see answers)

How do I convert inches to centimetres quickly?

Multiply inches by 2.54 to get centimetres. For a quick estimate, multiply by 2.5, then add a little. Example: 8 inches × 2.54 = 20.32 cm.

What is the easiest way to change miles to kilometres?

Multiply miles by 1.6 for a good estimate or by 1.609 for accuracy. Example: 5 miles ≈ 8 km, exactly 8.045 km with 1.609.

When should I use metric instead of imperial in the UK?

Use metric for science and most measurements at school and in shops. Imperial is still common for road distances in miles and some body measures.

Try These Related Quizzes

1.

Which is further: 10 miles or 10 kilometres?

[ ]	10 kilometres
[ ]	10 miles
[ ]	They are the same
[ ]	None of the above

2.

Adam is 6 feet 4 inches tall, approximately how tall is he in metres and centimetres?

[ ]	1 m 64 cm
[ ]	1 m 80 cm
[ ]	1 m 90 cm
[ ]	2 m 10 cm

3.

Which is the largest weight of the following?

[ ]	2 kg
[ ]	7 lbs
[ ]	1,860 g
[ ]	17 oz

4.

An imperial gallon of petrol contains approximately how many litres?

[ ]	1.6
[ ]	4.5
[ ]	5.4
[ ]	6.1

5.

An ounce weighs approximately how many grams (g)?

[ ]	2.8 g
[ ]	8.2 g
[ ]	28 g
[ ]	82 g

6.

A Formula One race must exceed 305 kilometres. Approximately how far is this in miles?

[ ]	90 miles
[ ]	190 miles
[ ]	290 miles
[ ]	390 miles

7.

Choose the largest drink from the following.

[ ]	1 gallon of orange juice
[ ]	1 pint of milk
[ ]	1 litre of water
[ ]	2,000 ml of tea

8.

A fuel tank holds 45 litres. Approximately how many pints will it hold?

[ ]	40 pints
[ ]	80 pints
[ ]	120 pints
[ ]	160 pints

9.

John buys 10 kilograms of potatoes. Approximately how much does he have to carry home in ounces?

[ ]	253 ounces
[ ]	352 ounces
[ ]	523 ounces
[ ]	532 ounces

10.

One yard equals three feet. How many inches are approximately equal to one metre?

[ ]	30 inches
[ ]	33 inches
[ ]	36 inches
[ ]	39 inches

You can find more about this topic by visiting BBC Bitesize - Imperial to metric

Maths Quiz - Level 3-4 Shapes - Imperial and Metric (Answers)

1.

Which is further: 10 miles or 10 kilometres?

[ ]	10 kilometres
[x]	10 miles
[ ]	They are the same
[ ]	None of the above

One mile is approximately equal to 1.6 kilometres

2.

Adam is 6 feet 4 inches tall, approximately how tall is he in metres and centimetres?

[ ]	1 m 64 cm
[ ]	1 m 80 cm
[x]	1 m 90 cm
[ ]	2 m 10 cm

1 foot contains 12 inches. 1 inch equals approximately 2.5 cm

3.

Which is the largest weight of the following?

[ ]	2 kg
[x]	7 lbs
[ ]	1,860 g
[ ]	17 oz

1 kg is approximately equal to 2.2 lbs. 'lbs' means pounds

4.

An imperial gallon of petrol contains approximately how many litres?

[ ]	1.6
[x]	4.5
[ ]	5.4
[ ]	6.1

An American gallon is only equal to 3.78 L!

5.

An ounce weighs approximately how many grams (g)?

[ ]	2.8 g
[ ]	8.2 g
[x]	28 g
[ ]	82 g

So, a quarter of an ounce would be 7g

6.

A Formula One race must exceed 305 kilometres. Approximately how far is this in miles?

[ ]	90 miles
[x]	190 miles
[ ]	290 miles
[ ]	390 miles

There are approximately 1.6 kilometres in a mile

7.

Choose the largest drink from the following.

[x]	1 gallon of orange juice
[ ]	1 pint of milk
[ ]	1 litre of water
[ ]	2,000 ml of tea

Remember this phrase: 'A litre of water is a pint and three quarters'

8.

A fuel tank holds 45 litres. Approximately how many pints will it hold?

[ ]	40 pints
[x]	80 pints
[ ]	120 pints
[ ]	160 pints

A gallon of water weighs approximately 10 pounds

9.

John buys 10 kilograms of potatoes. Approximately how much does he have to carry home in ounces?

[ ]	253 ounces
[x]	352 ounces
[ ]	523 ounces
[ ]	532 ounces

1 kilogram equals approximately 2.2 pounds and 1 pound equals 16 ounces

10.

One yard equals three feet. How many inches are approximately equal to one metre?

[ ]	30 inches
[ ]	33 inches
[ ]	36 inches
[x]	39 inches

A metre is about 3.25 yards