A smart blend of the words "calculate" and "list" gives this domain a well organised feel.
The word "Calculist" contains nine letters and three syllables. Three syllable names are used by established brands like Grammarly, KFC and Nescafé.
This domain was first registered in February 2011. Older domains have an advantage when ranking in search engines.
Calculist.com is a dot-com domain. Dot com domains are the most prestigious top-level-domain in the world, famously used by websites like google.com. Once secured, a dot-com all but guarantees no-one else can outrank you for your own name in the long run.