EXHIBIT 12-1

MICHIGAN CONSOLIDATED GAS COMPANY AND SUBSIDIARIES
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
(THOUSANDS OF DOLLARS)

|                                                    |                          |   |                     |         |                     |   |                     |         |  |   |         |         | 
|--------------------------------------------------- | ------------------------ | - | ------------------- | ------- | ------------------- | - | ------------------- | ------- |  | - | ------- | ------- | 
|                                                    |                          |   | Twelve Months Ended |         | Twelve Months Ended |   | Twelve Months Ended
|                                                    |                          |   |                     |         |                     |   |                    
|                                                    |                          |   | March 31, 2000      |         | December 31, 1999   |   | December 31, 1998  
|                                                    |                          |   |                     |         |                     |   |                    
|EARNINGS AS DEFINED (1)                             |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|Net Income                                          |                          | $ | 138,037             |         |                     | $ | 162,389             |         |  | $ | 114,619 |        
|Fixed charges                                       |                          |   | 60,771              |         |                     |   | 59,340              |         |  |   | 61,304  |        
|                                                    |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|                                                    | Earnings as defined      |   | $                   | 198,808 |                     |   | $                   | 221,729 |  |   | $       | 175,923 | 
|                                                    |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|FIXED CHARGES AS DEFINED (1)                        |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|Interest on long-term debt                          |                          | $ | 49,310              |         |                     | $ | 48,455              |         |  | $ | 47,091  |        
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|Interest on other borrowed funds                    |                          |   | 8,980               |         |                     |   | 8,626               |         |  |   | 12,113  |        
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|Amortization of debt discounts, premium
and expense |                          |   | 1,199               |         |                     |   | 1,144               |         |  |   | 955     |        
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|Interest implicit in rentals (2)                    |                          |   | 1,282               |         |                     |   | 1,115               |         |  |   | 1,145   |        
|                                                    |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|                                                    | Fixed charges as defined |   | $                   | 60,771  |                     |   | $                   | 59,340  |  |   | $       | 61,304  | 
|                                                    |                          |   |                     |         |                     |   |                     |         |  |   |         |        
|Ratio of Earnings to Fixed Charges                  |                          |   | 3.27                |         |                     |   | 3.74                |         |  |   | 2.87    |        
|                                                    |                          |   |                     |         |                     |   |                     |         |  |   |         |        



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|Notes: |  |                                                                                                   
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|(1)    |  | Earnings and fixed charges are defined and computed in accordance
with Item 503 of Regulation S-K.
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|(2)    |  | This amount is estimated to be a reasonable approximation of the interest
portion of rentals.     

MichCon is a guarantor of certain other debt. Fixed charges related to such debt
are deemed to be immaterial and therefore have been excluded from the above
ratios.