What's the plural form of undercalculation? Here's the word you're looking for.
Answer
The noun undercalculation can be countable or uncountable.
In more general, commonly used, contexts, the plural form will also be undercalculation.
However, in more specific contexts, the plural form can also be undercalculations e.g. in reference to various types of undercalculations
or a collection of undercalculations.