Exhibit 12

CONOCOPHILLIPS AND CONSOLIDATED SUBSIDIARIES

TOTAL ENTERPRISE

Computation of Ratio of Earnings to Fixed Charges

|  | Millions of Dollars |
|  | Nine Months Ended September 30 |
|  | 2012 |  |  | 2011 |
Earnings Available for Fixed Charges |  |  |  |
Income from continuing operations before income taxes and noncontrolling interests that have not incurred fixed charges |  | $ | 12,260 |  |  |  | 12,818 |
Distributions less than equity in earnings of affiliates |  |  | (401 | ) |  |  | (292 | )
Fixed charges, excluding capitalized interest* |  |  | 703 |  |  |  | 898 |
|  | $ | 12,562 |  |  |  | 13,424 |
Fixed Charges |  |  |  |  |  |  |  |
Interest and debt expense, excluding capitalized interest |  | $ | 588 |  |  |  | 729 |
Capitalized interest |  |  | 449 |  |  |  | 352 |
Interest portion of rental expense |  |  | 47 |  |  |  | 47 |
|  | $ | 1,084 |  |  |  | 1,128 |
Ratio of Earnings to Fixed Charges |  |  | 11.6 |  |  |  | 11.9 |

* | Includes amortization of capitalized interest totaling approximately $59 million in 2012 and $77 million in 2011.