Everyday maths for Health and Social Care and Education Support 1
Everyday maths for Health and Social Care and Education Support 1

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Everyday maths for Health and Social Care and Education Support 1

4.2 Using pints and gallons

You might still see the old, imperial units for measuring volume.

  • 20 fluid ounces (fl oz) = 1 pint (pt)
  • 8 pts = 1 gallon (gal)

A pint is a little more than half a litre.

A fluid ounce is about 30 ml.

Some measuring jugs show both metric and imperial units.

Described image
Figure 35 Using metric and imperial units

Example: Residential care home

The staff and residents in a residential care home consume one gallon of milk each day. How many litres is this?

Method

A pint is a little more than half a litre, so you can get just over a litre for every 2 pints.

There are 8 pints in a gallon, this is just over 4 litres of milk

Now try the following activity. Remember to check your answers once you have completed the questions.

Activity 11: Converting between metric and imperial measurements

  1. A patient who was involved in a car accident requires 1.5 pints of blood from a transfusion. Each donated bag of blood contains 470ml. How many bags does the patient need for the transfusion? Give your answer to the nearest whole number.
  1. A 1-month old baby consumes approximately 800ml of milk per day. How many pints is this?

Answer

  1. You know that:
    • 1 pint = 568 ml

    So 1.5 pints = 1.5 x 568ml = 852ml

    Divide the amount in ml by 470ml to find out how many bags are needed:

    • 852 ÷ 470 = 1.8

    Rounding this to the nearest whole number, the patient will need 2 bags of blood.

  1. You know that:
    • 1 pint = 568 ml

    So you need to divide 800ml by 568ml to find the number of pints:

    • 800 ÷ 568 = 1.4 pints

Summary

In this section you have learned how to:

  • identify the standard units for measuring volume or capacity
  • measure volume (or capacity)
  • compare metric and imperial measures.
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