EXHIBIT 12.1

SEMPRA ENERGY

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

(Dollars in millions)

	Six months ended June 30, 2017		Year ended December 31,
			2016		2015		2014		2013		2012
Fixed charges:
Interest expensed and capitalized and amortization of premiums, discounts and capitalized expenses related to indebtedness(1)	$	380	$	701	$	677	$	636	$	620	$	601
Estimate of interest within rental expense		2		3		2		3		2		2
Preference security dividend requirements of consolidated subsidiaries(2)		1		2		2		1		6		6
Total fixed charges	$	383	$	706	$	681	$	640	$	628	$	609
Earnings:
Pretax income from continuing operations before income or loss from equity investees, noncontrolling interests and preferred dividends of subsidiaries	$	1,149	$	1,824	$	1,600	$	1,443	$	1,399	$	1,255
Add:
Total fixed charges (from above)		383		706		681		640		628		609
Amortization of capitalized interest(1)		—		—		—		—		—		—
Distributed income of equity investees		17		53		83		61		51		50
Pretax losses of equity investees for which charges arising from guarantees are included in fixed charges		—		—		—		—		—		—
Less:
Interest capitalized		31		90		69		40		23		53
Preference security dividend requirements of consolidated subsidiaries(2)		1		2		2		1		6		6
Noncontrolling interest in pretax income of subsidiaries that have not incurred fixed charges		—		—		—		—		—		—
Total earnings for purpose of ratio	$	1,517	$	2,491	$	2,293	$	2,103	$	2,049	$	1,855
Ratio of earnings to fixed charges		3.96		3.53		3.37		3.29		3.26		3.05

(1) In computing this ratio, our public utilities that follow FASB ASC Topic 980, Regulated Operations, do not reduce Fixed Charges by allowance for funds used during construction, or add amortization of capitalized interest in determining earnings.

(2) In computing this ratio, “Preference security dividend requirements of consolidated subsidiaries” represents the pretax earnings necessary to pay such dividends, computed at the effective tax rates for the applicable periods.