Estimate lumber needed for a wall frame.
Formula: Studs = ⌈(Length×12)/Spacing⌉ + 1 + Extra. Plates = ⌈(Length×3)/16⌉ (3 plates per wall, each 16ft). Board Feet = (Studs×Height + Plates×Length)×1.5×5.5/12 (2x6 lumber).