Exhibit 12

Williams Partners L.P.

Computation of Ratio of Earnings to Fixed Charges

	Six months ended June 30, 2013
	(Millions)
Earnings:
Income before income taxes and noncontrolling interests	$	595
Less: Equity earnings, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		(6)
Income before income taxes, equity earnings and noncontrolling interests		589
Add:
Fixed charges:
Interest incurred, including proportionate share from 50% owned investees and unconsolidated majority-owned investees		243
Rental expense representative of interest factor		5
Total fixed charges		248
Distributed income of equity method investees, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		12
Less:
Interest capitalized		(33)
Total earnings as adjusted	$	816
Fixed charges	$	248
Ratio of earnings to fixed charges		3.29