Exhibit 12

Williams Partners L.P.

Computation of Ratio of Earnings to Fixed Charges

	Nine months ended
	September 30, 2012
	(Millions)
Earnings:
Income before income taxes	$	779
Less: Equity earnings, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		(45	)
Income before income taxes and equity earnings		734
Add:
Fixed charges:
Interest accrued, including proportionate share from 50% owned investees and unconsolidated majority-owned investees		341
Rental expense representative of interest factor		6
Total fixed charges		347
Distributed income of equity-method investees, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		66
Less:
Capitalized interest		(16	)
Total earnings as adjusted	$	1,131
Fixed charges	$	347
Ratio of earnings to fixed charges		3.26