# Unit Conversion

• Unit Conversion is the process of changing units of measurement from one form to another. For instance, metres to kilometres, or hours to seconds.
• Understanding this process is essential in solving various mathematical problems, especially in Geometry and Measures, where different units are often encountered.
• Units of length that might need conversion include millimetres (mm), centimetres (cm), metres (m), kilometres (km), inches (in), feet (ft), yards (yd), and miles (mi).
• To convert from a smaller unit to a larger unit, divide. Conversely, to convert from a larger unit to a smaller unit, multiply. For instance, 1 kilometre is equivalent to 1,000 metres, hence if you have 3 kilometres, you would have 3 x 1,000 = 3,000 metres.
• In the case of area units, know how to convert between square millimetres (mm2), square centimetres (cm2), square metres (m2), square kilometres (km2), square inches (in2), square feet (ft2), square yards (yd2), and square miles (mi2)
• For volume units, be familiar with conversions between cubic millimetres (mm3), cubic centimetres (cm3), cubic metres (m3), cubic kilometres (km3), cubic inches (in3), cubic feet (ft3), cubic yards (yd3), and cubic miles (mi3).
• In measures of time, you might convert between microseconds, milliseconds, seconds, minutes, hours, days, weeks, months and years.
• You should also know how to convert between different units of mass such as milligrams, grams, kilograms, and tonnes.
• Conversion factors are used to change units. For example, the conversion factor to change from centimetres to millimetres is 10 because there are 10 millimetres in 1 centimetre.
• Complex conversions might involve multiple steps. Having strong multiplication and division skills plus a systematic approach will help in solving these types of problems.
• Always remember to label your answers correctly with the appropriate units after doing conversions.
• Units of measurement help us describe the world around us in a way that can be easily understood. Mastering the skill of converting between different units is key to solving practical math problems in both real-world situations and mathematical contexts.