Exhibit 12

CONOCOPHILLIPS AND CONSOLIDATED SUBSIDIARIES

TOTAL ENTERPRISE

Computation of Ratio of Earnings to Fixed Charges

|  | Millions of Dollars |
|  | Six Months Ended June 30 |
|  | 2013 |  |  | 2012 |
Earnings Available for Fixed Charges |  |  |  |  |  |  |  |
Income from continuing operations before income taxes and noncontrolling interests that have not incurred fixed charges |  | $ | 7,457 |  |  |  | 8,172 |
Distributions less than equity in earnings of affiliates |  |  | (228) |  |  |  | (256) |
Fixed charges, excluding capitalized interest* |  |  | 359 |  |  |  | 514 |
|  | $ | 7,588 |  |  |  | 8,430 |
Fixed Charges |  |  |  |  |  |  |  |
Interest and debt expense, excluding capitalized interest |  | $ | 269 |  |  |  | 428 |
Capitalized interest |  |  | 365 |  |  |  | 290 |
Interest portion of rental expense |  |  | 34 |  |  |  | 27 |
|  | $ | 668 |  |  |  | 745 |
Ratio of Earnings to Fixed Charges |  |  | 11.4 |  |  |  | 11.3 |

*Includes amortization of capitalized interest totaling approximately $57 million in 2013 and $59 million in 2012.