To ascertain by computation; reckon: calculating the area of a circle; calculated their probable time of arrival. To make an estimate of; evaluate: calculating the team's chances of winning. To make for a deliberate purpose; design: a sturdy car that is calculated to last for years; a choice that was calculated to please. Chiefly New England To suppose: "I cal'late she's a right smart cook\u201d ( Dialect Notes). Chiefly New England To plan, intend, or count on. To perform a mathematical process; figure: We must measure and calculate to determine how much paint will be needed. To predict consequences. Regional To suppose; guess. Regional To count, depend, or rely on someone or something: We're calculating on your help.