Exhibit 12

Williams Partners L.P.

Computation of Ratio of Earnings to Fixed Charges

	Nine months ended
	September 30, 2013
	(Millions)
Earnings:
Income before income taxes and noncontrolling interests	$	875
Less: Equity earnings, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees	(15		)
Income before income taxes, equity earnings and noncontrolling interests	860
Add:
Fixed charges:
Interest incurred, including proportionate share from 50% owned investees and unconsolidated majority-owned investees	364
Rental expense representative of interest factor	7
Total fixed charges	371
Distributed income of equity method investees, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees	18
Less:
Interest capitalized	(50		)
Total earnings as adjusted	$	1,199
Fixed charges	$	371
Ratio of earnings to fixed charges	3.23