Exhibit 12

Williams Partners L.P.

Computation of Ratio of Earnings to Fixed Charges

	Three Months Ended
	March 31, 2018
	(Millions)
Earnings:
Income (loss) before income taxes	$	384
Less: Equity earnings	(82		)
Income (loss) before income taxes and equity earnings	302
Add:
Fixed charges:
Interest incurred	218
Rental expense representative of interest factor	3
Total fixed charges	221
Distributed income of equity-method investees	140
Less:
Interest capitalized	(9		)
Total earnings as adjusted	$	654
Fixed charges	$	221
Ratio of earnings to fixed charges	2.96