What are the units of capacity?

Answer 1

Capacity is not related to any specific measurement. it only means how much of the "thing" can the system cope with. Some common capacities are:

• Area - age surface space for stacking things on, losing heat from etc. It is measured in acres, square feet or inches, hectares, square mikes or kilometres
  
• Electrical capacity which measured in amps, volts and ohms
• Volume measured in cubic feet/yeards, cubic centimetres/metres/kilometers or quarts/galloms, litres or steres
• Heat measured in ergs per unit volume or mass, calories per gram,BTU per pound
• Pressure in psi, pascals, atmospheres
• Rooms in the number of people they can hold
• Roads on the maximum traffic rates