Exhibit 12

ONEOK Partners, L.P.
Computation of Ratio of Earnings to Fixed Charges
	Years Ended December 31,
(Unaudited)	2009			2008			2007			2006			2005
				(Thousands of dollars)
Fixed Charges, as defined
Interest on long-term debt	$	207,684		$	172,810		$	146,046		$	136,533		$	90,066
Other interest		12,136			12,426			4,714			439			3
Amortization of debt discount, premium    and expense		2,337			1,942			1,765			(2,294	)		(2,379	)
Interest on lease agreements		3,641			6,341			6,392			5,605			1,522
Total Fixed Charges		225,798			193,519			158,917			140,283			89,212
Earnings before income taxes and undistributed    income of equity method investees		468,611			618,848			417,305			501,595			189,042
Earnings available for fixed charges	$	694,409		$	812,367		$	576,222		$	641,878		$	278,254
Ratio of earnings to fixed charges		3.08	x		4.20	x		3.63	x		4.58	x		3.12	x
For purposes of computing the ratio of earnings to fixed charges, "earnings" consists of pre-tax income from continuing operations before adjustment for income or loss from equity investees plus fixed charges and distributed income of equity investees, less interest capitalized. "Fixed charges" consists of interest charges, the amortization of debt discounts and issue costs and the representative interest portion of operating leases.