Exhibit 12

ONEOK Partners, L.P.

Computation of Ratio of Earnings to Fixed Charges

	Years Ended December 31,
(Unaudited)	2010		2009		2008		2007		2006
	(Thousands of dollars)
Fixed Charges, as defined
Interest on long-term debt	$	202,968	$	207,684	$	172,810	$	146,046	$	136,533
Other interest		2,624		12,136		12,426		4,714		439
Amortization of debt discount, premium    and expense		2,547		2,337		1,942		1,765		(2,294	)
Interest on lease agreements		1,484		3,641		6,341		6,392		5,605
Total Fixed Charges		209,623		225,798		193,519		158,917		140,283
Earnings before income taxes and    undistributed income of equity method    investees		479,636		468,611		618,848		417,305		501,595
Earnings available for fixed charges	$	689,259	$	694,409	$	812,367	$	576,222	$	641,878
Ratio of earnings to fixed charges		3.29		3.08		4.20		3.63		4.58

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.