Standard Units 1

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Length and Area

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  • Standard units for length are kilometres (km), meters (m), centimetres (cm) and millimetres (mm).
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Imperial units

  • For long distances either kilometres or miles can be used.
    • 5 miles is roughly 8 kilometres.
  • Miles are imperial (traditional) units. The other imperial units for length are feet, yards and inches.
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  • Standard units for area are square kilometres (km2), square metres (m2), square centimetres (cm2) and square millimetres (mm2).
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Converting area units

  • To convert between different units of volume, write out the measure as a multiplication and convert each part separately.

Jump to other topics


1.1Place Value

1.2Factors & Multiples


1.4Fractions, Decimals & Percentages

1.5Growth & Decay

1.6Measurements & Units



3Ratio, Proportion & Rates of Change

4Geometry & Measures



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