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Chapter overview
Learning goals
Learning Goals
Maths
Types of numbers
Number calculations
Fractions, decimals and percentages
Algebraic manipulation
Formulae and equations
Straight line graphs
Other graphs
Ratio
Proportion
Rates of change
Shapes
Properties of shapes
Lines and angles
Drawing shapes
Trigonometry
Probability
Maths
Summary
The imperial unit system is another set of units that are not used as much nowadays, but are still seen in specific circumstances.
Here is a table of imperial units:
Measurement | Units |
Length | Inches, feet, yards, miles |
Area | Square inches, square feet, square miles |
Volume | Cubic inches, cubic feet, gallons, pints |
Mass | Ounces, pounds, stones, tons |
Speed | Miles per hour (mph) |
Note: Tons and tonnes are two different units of measure!
While there is no need to memorise any conversions related to imperial measurements, it is still important to be familiar with them when converting from either one imperial unit to another, or an imperial unit to a metric unit.
A bird weighs 3 pounds. Given that 1 pound =16 ounces, how much does the bird weigh in ounces?
The conversion rate is given:
1 pound =16 ounces
Multiply both sides by 3 to find what 3 pounds is equivalent to:
3 pounds =16×3 ounces
3 pounds =48 ounces
The bird weighs 48 ounces.
Give an approximate conversion of 30 pints to gallons to 1 decimal place, given that 1 litre ≈1.75 pints, and 1 gallon ≈4.5 litres.
First, convert the 30 pints to litres:
1 litre ≈1.75 pints
1 pint ≈1.751 litres
30 pints ≈(1.751×30) litres
30 pints ≈17.14 litres
Then, convert the 17.14 litres to gallons:
1 gallon ≈4.5 litres
1 litre ≈4.51 gallons
17.14 litres ≈(4.51×17.14) gallons
17.14 litres ≈3.8095.... gallons
30 pints≈3.8 gallons (1.d.p)
The imperial unit system is another set of units that are not used as much nowadays, but are still seen in specific circumstances.
Here is a table of imperial units:
Measurement | Units |
Length | Inches, feet, yards, miles |
Area | Square inches, square feet, square miles |
Volume | Cubic inches, cubic feet, gallons, pints |
Mass | Ounces, pounds, stones, tons |
Speed | Miles per hour (mph) |
Note: Tons and tonnes are two different units of measure!
While there is no need to memorise any conversions related to imperial measurements, it is still important to be familiar with them when converting from either one imperial unit to another, or an imperial unit to a metric unit.
A bird weighs 3 pounds. Given that 1 pound =16 ounces, how much does the bird weigh in ounces?
The conversion rate is given:
1 pound =16 ounces
Multiply both sides by 3 to find what 3 pounds is equivalent to:
3 pounds =16×3 ounces
3 pounds =48 ounces
The bird weighs 48 ounces.
Give an approximate conversion of 30 pints to gallons to 1 decimal place, given that 1 litre ≈1.75 pints, and 1 gallon ≈4.5 litres.
First, convert the 30 pints to litres:
1 litre ≈1.75 pints
1 pint ≈1.751 litres
30 pints ≈(1.751×30) litres
30 pints ≈17.14 litres
Then, convert the 17.14 litres to gallons:
1 gallon ≈4.5 litres
1 litre ≈4.51 gallons
17.14 litres ≈(4.51×17.14) gallons
17.14 litres ≈3.8095.... gallons
30 pints≈3.8 gallons (1.d.p)
Converting between metric and imperial units
FAQs
Question: How do you convert imperial units to metric units or other imperial units?
Answer: Use the conversion rate that you're given and multiply/divide your number by the conversion rate.
Question: What are imperial units?
Answer: Imperial units are a lesser used set of units of measure.
Theory
Exercises
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