# GCSE: Units Dr J Frost GCSE Revision Pack Ref: 157, 158, 160

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Dr J Frost (jfrost@tiffin.kingston.sch.uk)
GCSE: Units Dr J Frost GCSE Revision Pack Ref: 157, 158, 160 Last modified: 13th April 2015

GCSE Specification (Using revision pack reference numbers) 157. Convert between units of measure in the same system. (NB: Conversion between imperial units will be given, metric equivalents should be known.) 158. Know rough metric equivalents of pounds, feet, miles, pints and gallons: Metric/Imperial Convert between imperial and metric measures 160. Convert between metric units of speed eg km/h to m/s

1 m = 100 cm 1cm = 10 mm 1 ton = 1000 kg 1 kg = 1000 g 1 𝑙 = 1000 ml
Metric ↔ Metric Conversions 1 m = 100 cm 1cm = 10 mm 1 ton = 1000 kg 1 kg = 1000 g 1 𝑙 = 1000 ml 1 𝑙 = 1000 cm3 ? ? ? ? ? ?

Imperial & Metric Metric Imperial Length Mass Capacity Feet Tonnes
Litres Gallons Metres Pints Inches Miles Pounds kg Miles Stone Metric Imperial Length Mass Capacity

Metric ↔ Imperial Conversions
You need to memorise these for your GCSE exam! 1 kg ≈ pounds (≈ means ‘approximately equal to’) 1 litre ≈ pints 4.5 litres ≈ gallon 8 km ≈ miles 30cm ≈ foot ? ? ? ? ? Test Your Understanding 5.4kg = pounds 49.69 pints = litres 40km = miles 75cm = foot ? 30 miles = km 28km = miles 480 miles = km ? ? ? ? ? ?

Memorise Time! ? ? ? ? ? ? ? ? ? ? 1 kg ≈ 2.2 pounds
1 litre ≈ pints 4.5 litres ≈ gallon 8 km ≈ miles 1 foot ≈ cm ? ? ? ? ? 4.5 litres ≈ gallon 1 litre ≈ pints 8 km ≈ miles 1 foot ≈ cm 1 kg ≈ pounds ? ? ? ? ?

Converting between compound units
30m/s 65m/s  1000 ? 0.03 km/s ? × 3600 ? 108 km/h 234 km/h ? ?