Exhibit 12

Williams Partners L.P.

Computation of Ratio of Earnings to Fixed Charges

	Three months ended March 31, 2012
	(Millions)
Earnings:
Income before income taxes	$	348
Less: Equity earnings, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		(21	)
Income before income taxes and equity earnings		327
Add:
Fixed charges:
Interest accrued, including proportionate share from 50% owned investees and unconsolidated majority-owned investees		110
Rental expense representative of interest factor		2
Total fixed charges		112
Distributed income of equity-method investees, excluding proportionate share from 50% owned investees and unconsolidated majority-owned investees		29
Less:
Capitalized interest		(3	)
Total earnings as adjusted	$	465
Fixed charges	$	112
Ratio of earnings to fixed charges		4.15