EXHIBIT 12.1 CALCULATION OF RATIOS OF EARNINGS TO FIXED CHARGES DUKE REALTY INVESTMENTS, INC. Year Ended December 31, ------------------------------------------------------------- 1997 1996 1995 1994 1993 ---------- ---------- ---------- ---------- ----------- Consolidated Net Income (Loss) Applicable to Common Shareholders $65,999,000 $50,872,000 $35,019,000 $26,216,000 $5,013,000 Allocation to Preferred Shares 12,485,000 2,559,000 0 0 0 (Gain) Loss on Property Sales (1,775,000) (4,532,000) (283,000) (2,198,000) (517,000) DRLP Minority Interest 7,574,000 7,184,000 6,530,000 6,751,000 1,657,000 Amortization of Deferred Financing Costs 1,368,000 1,208,000 1,218,000 1,251,000 294,000 Interest Expense 38,928,000 31,344,000 21,424,000 18,920,000 10,334,000 ----------- ---------- ---------- ---------- ---------- Earnings Before Fixed Charges 124,579,000 88,635,000 63,908,000 50,940,000 16,781,000 ----------- ---------- ---------- ---------- ---------- ----------- ---------- ---------- ---------- ---------- Interest Expense 38,928,000 31,344,000 $21,424,000 $18,920,000 $10,334,000 Allocation to Preferred Shares 12,485,000 2,559,000 0 0 0 Amortization of Deferred Financing Costs 1,368,000 1,208,000 1,218,000 1,251,000 294,000 Interest Costs Capitalized 6,003,000 5,525,000 4,198,000 1,681,000 0 ----------- ----------- ----------- ----------- ----------- Total Fixed Charges $58,784,000 $40,636,000 $26,840,000 $21,852,000 $10,628,000 ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- Fixed Charges Ratio 2.12 2.18 2.38 2.33 1.58 ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- ----------- EXHIBIT 12.1 CALCULATION OF RATIOS OF EARNINGS TO FIXED CHARGES DUKE REALTY LIMITED PARTNERSHIP Year Ended December 31, Period Ended ------------------------------------------------- December 31, 1997 1996 1995 1994 1993 ----------- ---------- ---------- ---------- ------------ Consolidated Net Income (Loss) Available to Common Units $72,780,000 $58,713,000 $41,600,000 $32,968,000 $7,660,000 Allocation to Preferred Units 12,485,000 2,559,000 0 0 0 (Gain) Loss on Property Sales (1,775,000) (4,532,000) (283,000) (2,198,000) (517,000) Amortization of Deferred Financing Costs 1,368,000 1,208,000 1,218,000 1,251,000 136,000 Interest Expense 38,928,000 31,344,000 21,462,000 18,920,000 4,605,000 ----------- ---------- ---------- ---------- ----------- Earnings Before Fixed Charges 123,786,000 89,292,000 63,997,000 50,941,000 11,884,000 ----------- ---------- ---------- ---------- ---------- ----------- ---------- ---------- ---------- ---------- Interest Expense 38,928,000 31,344,000 $21,462,000 $18,920,000 $4,605,000 Allocation to Preferred Units 12,485,000 2,559,000 0 0 0 Amortization of Deferred Financing Costs 1,368,000 1,208,000 1,218,000 1,251,000 136,000 Interest Costs Capitalized 6,003,000 5,525,000 4,198,000 1,681,000 0 ----------- ----------- ----------- ----------- ---------- Total Fixed Charges 58,784,000 $40,636,000 $26,878,000 $21,852,000 $4,741,000 ----------- ----------- ----------- ----------- ---------- ----------- ----------- ----------- ----------- ---------- Fixed Charges Ratio 2.11 2.20 2.38 2.33 2.51 ----------- ----------- ----------- ----------- ---------- ----------- ----------- ----------- ----------- ----------