Exhibit 12

Nucor Corporation

2017 Form 10-K

Computation of Ratio of Earnings to Fixed Charges

	Year ended December 31,
	2013			2014			2015			2016			2017
	(In thousands, except ratios)
Earnings
Earnings before income taxes and noncontrolling interests	$	808,568		$	1,147,288		$	241,866		$	1,298,659		$	1,749,957
Plus: (earnings)/losses from equity investments		(9,297	)		(13,505	)		(5,329	)		(38,757	)		(41,661	)
Plus: fixed charges (includes interest expense and amortization of bond issuance costs and settled swaps and estimated interest on rent expense)		164,128			178,240			178,941			186,437			190,889
Plus: amortization of capitalized interest		3,064			4,166			4,062			3,715			4,208
Plus: distributed income of equity investees		8,708			53,738			15,132			40,602			49,295
Less: interest capitalized		(10,913	)		(2,946	)		(311	)		(3,940	)		(1,590	)
Less: pre-tax earnings in noncontrolling interests in subsidiaries that have not incurred fixed charges		(94,330	)		(99,227	)		(112,306	)		(104,145	)		(61,883	)
Total earnings before fixed charges	$	869,928		$	1,267,754		$	322,055		$	1,382,571		$	1,889,215
Fixed charges
Interest cost and amortization of bond issuance and settled swaps	$	162,899		$	177,088		$	177,855		$	185,119		$	188,872
Estimated interest on rent expense		1,229			1,152			1,086			1,318			2,017
Total fixed charges	$	164,128		$	178,240		$	178,941		$	186,437		$	190,889
Ratio of earnings to fixed charges		5.30			7.11			1.80			7.42			9.90