Koppers (KOP) 10-Q 2010 Q2 Quarterly report

Exhibit 12.1

KOPPERS HOLDINGS INC.

RATIO OF EARNINGS TO FIXED CHARGES

(Dollars in millions, except ratios)

	2005			2006			2007			2008			2009			Six months ended June 30, 2010
Earnings:
Income from continuing operations before taxes	$	18.2		$	18.6		$	79.5		$	90.0		$	35.5		$	37.6
Deduct: Equity earnings net of dividends		0.1			(0.3	)		(0.2	)		(0.6	)		(0.8	)		—
Deduct: Pre-tax income of noncontrolling interests		2.7			1.9			3.1			0.8			3.4			0.2
Add: Fixed charges		59.7			69.4			55.5			53.5			71.6			20.2
Earnings as defined	$	75.1		$	86.4		$	132.1		$	143.3		$	104.5		$	57.6
Fixed charges:
Interest expensed	$	51.7		$	61.3		$	45.9		$	41.4		$	58.7		$	13.8
Interest capitalized		—			0.2			0.3			—			—			—
Other		—			—			—			0.4			0.5			—
Rents		25.7			26.1			31.1			39.0			41.5			20.5
Interest factor		31	%		31	%		31	%		31	%		31	%		31	%
Estimated interest component of rent		8.0			8.1			9.6			12.1			12.9			6.4
Total fixed charges	$	59.7		$	69.6		$	55.8		$	53.9		$	72.1		$	20.2
Ratio of earnings to fixed charges		1.26			1.24			2.37			2.66			1.45			2.85
Preference dividends	$	29.0		$	—		$	—		$	—		$	—		$	—
Ratio of pre-tax income to net income		1.72			—			—			—			—			—
Preferred dividend factor	$	49.9		$	—		$	—		$	—		$	—		$	—
Ratio of earnings to combined fixed charges and preference dividends(1)		—			1.24			2.37			2.66			1.45			2.85

(1) Earnings were insufficient to cover combined fixed charges and preference dividends by and $34.5 million in 2005.