How many letters does the top answer for “a calculator that performs simple arithmetic functions” have?

The most common answer is totaliser (9 letters).

Crossword clue: a calculator that performs simple arithmetic functions

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

totaliser 9 letters wn-def

a calculator that performs simple arithmetic functions

totalizer 9 letters wn-def

a calculator that performs simple arithmetic functions