Exhibit 12 COOPER INDUSTRIES, LTD. COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES (Dollar Amounts in Thousands) (Unaudited) Nine Months Ended September 30, ----------------------------------- 2003 2002 ---------------- ---------------- Interest Expense $ 57,900 $ 53,900 Capitalized Interest - - Estimated Interest Portion of Rent Expense 9,164 10,476 ---------------- ---------------- Fixed Charges $ 67,064 $ 64,376 ================ ================ Income From Continuing Operations Before Income Taxes $ 253,100 $ 243,800 Add: Fixed Charges 67,064 64,373 Less: Equity in (Earnings) / Losses of Less Than 50% Owned Companies (1,579) (2,577) ---------------- ---------------- Earnings Before Fixed Charges $ 318,585 $ 305,599 ================ ================ Ratio of Earnings to Fixed Charges 4.8x 4.7x Year Ended December 31, ------------------------------------------------------------------------------------------ 2002 2001 2000 1999 1998 ---------------- ---------------- ---------------- ---------------- ---------------- Interest Expense $ 74,500 $ 84,700 $ 100,300 $ 55,200 $ 101,900 Capitalized Interest - 1,462 3,946 - - Estimated Interest Portion of Rent Expense 14,679 13,369 15,614 13,948 12,352 ---------------- ---------------- ---------------- ---------------- ---------------- Fixed Charges $ 89,179 $ 99,531 $ 119,860 $ 69,148 $ 114,252 ================ ================ ================ ================ ================ Income From Continuing Operations Before Income Taxes $ 280,200 $ 316,400 $ 549,900 $ 518,600 $ 523,600 Add: Fixed Charges 89,179 98,069 115,914 69,148 114,252 Less: Equity in (Earnings) / Losses of Less Than 50% Owned Companies (2,969) (2,922) (3,367) (1,069) 595 ---------------- ---------------- ---------------- ---------------- ---------------- Earnings Before Fixed Charges $ 366,410 $ 411,547 $ 662,447 $ 586,679 $ 638,447 ================ ================ ================ ================ ================ Ratio of Earnings to Fixed Charges 4.1x 4.1x 5.5x 8.5x 5.6x