1 EXHIBIT 12.01 MARTIN MARIETTA MATERIALS, INC. AND CONSOLIDATED SUBSIDIARIES COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES FOR THE YEAR ENDED DECEMBER 31, 1999 (AMOUNTS IN THOUSANDS) EARNINGS: Earnings before income taxes $ 194,313 Earnings of less than 50%-owned associated companies, net (487) Interest expense 39,411 Portion of rents representative of an interest factor 2,807 --------- ADJUSTED EARNINGS AND FIXED CHARGES $ 236,044 ========= FIXED CHARGES: Interest Expense $ 39,411 Capitalized interest 834 Portion of rents representative of an interest factor 2,807 --------- TOTAL FIXED CHARGES $ 43,052 ========= RATIO OF EARNINGS TO FIXED CHARGES 5.48 =========