Exhibit 12

Williams Partners L.P.

Computation of Ratio of Earnings to Fixed Charges

	Nine Months Ended
	September 30, 2017
	(Millions)
Earnings:
Income (loss) before income taxes	$	1,295
Less: Equity earnings	(347		)
Income (loss) before income taxes and equity earnings	948
Add:
Fixed charges:
Interest incurred	645
Rental expense representative of interest factor	7
Total fixed charges	652
Distributed income of equity-method investees	602
Less:
Interest capitalized	(24		)
Total earnings as adjusted	$	2,178
Fixed charges	$	652
Ratio of earnings to fixed charges	3.34