If you mean capacity as in volume: the basic unit is cubic meters, since lengths are measured in meters. Of course, cubic centimeters, cubic millimeters, or cubic kilometers can be used as well, depending on the application.
If you mean capacitance: the modern version of the metric system, the SI, the basic unit is the Farad. Since in practice this is a very large unit, usually smaller multiples are used, such as microfarad, nanofarad, or picofarad.
Answer
There are just seven base units in the SI system. 'Capacity', in the sense of volume, is measured in cubic metres which is a derived unit, not a base unit.
By capacity, I assume you mean volume. That would be the liter.
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a metric ruler is a different way of measuring things and with measuring there is the English system (inches feet etc) and the metric system (centimeters meters etc)
The metric system is the 'standard' system for most of the world.
Metric or Imperial
measuring the volume of the metric system the bushel scale and is used by units of measurement that litters. ml. cubic inch. cubic meters. Decimeter cubic meters. It is.
It would be apple
The difference between centimeters and inches is that inches is in the standard measuring system and centimeters is part of the metric measuring system.
measuring temperature the metric system of °C is used.
a metric ruler is a different way of measuring things and with measuring there is the English system (inches feet etc) and the metric system (centimeters meters etc)
The metric system is the 'standard' system for most of the world.
The word "metric" refers to measurements and the metric system is a system for measuring physical and chemical attributes.
The metric system is an internationally agreed system for measuring physical and chemical attributes.
The Standard Metric System...
The metric system is used for measuring anything and everything.
Metric or Imperial
The metric system is based on multiples of ten.
The Metric System