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Teaching mathematics
Teaching mathematics

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1.4 Useful ‘rough’ metric to imperial equivalences

Below is a list of useful ‘rule of thumb’ equivalences between metric and imperial measures.

  • 10 cm is about 4 inches
  • 30 cm is about 12 inches = 1 foot
  • 8 km is about 5 miles
  • A litre of water is a pint and three-quarters.
  • Two and a quarter pounds of jam, weighs about a kilogram.