Continental Resources Inc (CLR) S-4 Registration of securities issued in business combination transactions

Continental Resources, Inc. Exhibit 12.1

Ratio of Earnings to Fixed Charges

(in thousands, except ratio)

	Year Ended December 31,													Nine Months Ended September 30,
	Pro forma			Historical										Pro forma			Historical
	2009			2009		2008		2007		2006		2005		2010			2010
Earnings
Income before income taxes		110,008			110,008		518,530		296,777		252,956		195,446		345,354			345,354
Plus: Fixed charges		72,945			23,232		12,188		12,939		11,310		14,220		55,652			33,163
Less: Capitalized interest		—			—		—		—		—		—		(288	)		(288	)
Pro forma adjustments:
Plus: Reduction in revolver interest expense		13,634			—		—		—		—		—		3,293			—
Less: Interest expense on Senior Notes		(61,528	)		—		—		—		—		—		(25,092	)		—
Less: Amortization of Senior Notes costs		(1,819	)		—		—		—		—		—		(690	)		—
Earnings, as defined		133,240			133,240		530,718		309,716		264,266		209,666		378,229			378,229
Fixed charges
Interest expense		23,232			23,232		12,188		12,939		11,310		14,220		32,875			32,875
Capitalized interest		—			—		—		—		—		—		288			288
Pro forma adjustments:
Less: Reduction in revolver interest expense		(13,634	)		—		—		—		—		—		(3,293	)		—
Plus: Interest expense on Senior Notes		61,528			—		—		—		—		—		25,092			—
Plus: Amortization of Senior Notes costs		1,819			—		—		—		—		—		690			—
Fixed charges, as defined		72,945			23,232		12,188		12,939		11,310		14,220		55,652			33,163
Ratio of earnings to fixed charges		1.8x	(1)		5.7x		43.5x		23.9x		23.4x		14.7x		6.8x	(1)		11.4x

(1) Adjusted to give effect to a pro forma increase in interest expense resulting from the issuance of the notes on September 16, 2010, the September 2009 issuance of our 8 ¹/4% Senior Notes due 2019, and the April 2010 issuance of our 7 ³/8% Senior Notes due 2020 and the utilization of the net proceeds from the sale of those notes to repay indebtedness that was outstanding under our revolving credit facility during the nine months ended September 30, 2010 and year ended December 31, 2009, as applicable, as if the issuance of those notes had occurred on January 1, 2010 and January 1, 2009, respectively.