It depends what I'm measuring. Depending on what the appropriate units and
physical dimensions are, I might use a ruler, a tape measure, a bathroom scale,
a kitchen measuring cup, a stopwatch, a speedometer, a frequency counter, a
microwave power meter, etc.
I would use the metric unit is inches
The ISO length unit to use would be the cementer.
Which unit would you use to measure the water in a full tub?
You would typically use the metric unit of centimeters to measure the growth of your hair.
You would use the unit of measurement called "kilograms" or "pounds" to measure the weight of a car.
You would typically use a unit of weight, such as grams or ounces, to measure a cherry.
It's SI unit is meters
The local currency unit.
you would divide
I would use centimetres.
I would use meters.
I would use kilometers.