EXHIBIT 12 JOHNSON CONTROLS, INC. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (Dollars in millions) Three Months Ended December 31, 2001 ---------------------------------- Net income $119.9 Provision for income taxes 75.5 Minority interests in net earnings of subsidiaries 14.9 Income from equity affiliates (4.1) Distributed income of equity affiliates 1.0 Amortization of previously capitalized interest 1.6 Other (0.3) ------------ 208.5 ------------ Fixed charges: Interest incurred and amortization of debt expense 35.9 Estimated portion of rent expense 17.1 ------------ Fixed charges 53.0 Less: Interest capitalized during the period (2.7) ------------ 50.3 ------------ Earnings $258.8 ============ Ratio of earnings to fixed charges 4.9 ============ For the purpose of computing this ratio, "earnings" consist of income before income taxes, minority interest in earnings or losses of consolidated subsidiaries and income from equity affiliates plus (a) amortization of previously capitalized interest, (b) distributed income from equity affiliates and (c) fixed charges, minus interest capitalized during the period. "Fixed charges" consist of (a) interest incurred and amortization of debt expense plus (b) the portion of rent expense representative of the interest factor. 20