"Napkin math" is the act of performing estimates (usually of a financial nature) to roughly determine the feasibility or validity of an outcome or fact. It is usually performed in an informal setting.
Napkin is an allusion to the disposable nature of the information.
Napkin is an allusion to the disposable nature of the information.
"I've done napkin math Dave, even if you get a $10k/year raise you still can't afford that mortgage".
by silentguardian September 13, 2013
Napkin Math is a two-party activity occurring during dinner in which a pen and napkin are used to discuss debates or questions about math. Napkin Math is a spontaneous activity started by discussions or questions and can take anywhere from a few minutes to around an hour.
by TheChris2009 November 4, 2022