Exhibit 12

Williams Partners L.P.

Computation of Ratio of Earnings to Fixed Charges

	Six months ended June 30, 2012
	(Millions)
Earnings:
Income before income taxes	$	543
Less: Equity earnings, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		(39	)
Income before income taxes and equity earnings		504
Add:
Fixed charges:
Interest accrued, including proportionate share from 50% owned investees and unconsolidated majority-owned investees		223
Rental expense representative of interest factor		4
Total fixed charges		227
Distributed income of equity-method investees, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		69
Less:
Capitalized interest		(8	)
Total earnings as adjusted	$	792
Fixed charges	$	227
Ratio of earnings to fixed charges		3.49