EXHIBIT 12.1

BRIGHAM EXPLORATION COMPANY
CALCULATION OF RATIO OF EARNINGS TO FIXED CHARGES

																			For the six months ended
	For the years ended December 31,																		June 30,
	2000			2001			2002			2003			2004			2005			2006
Earnings available for fixed charges:
Income (loss) before income taxes (1)	$	16,931		$	11,674		$	2,276		$	16,539		$	30,513		$	42,472		$	16,425
Interest expense, net (2)		9,906			6,681			6,238			4,475			2,418			3,246			3,929
Preferred dividend reported as interest expense		—			—			—			340			726			734			301
Earnings available	$	26,837		$	18,355		$	8,514		$	21,354		$	33,657		$	46,452		$	20,655
Fixed charges:
Expensed interest (3)	$	9,906		$	6,681		$	6,238		$	4,475		$	2,418		$	3,246		$	3,929
Capitalized interest		2,772			1,848			878			818			1,195			1,604			1,207
Preferred dividend and accretion		275			2,450			2,952			3,448			—			—			—
Preferred dividend reported as interest expense		—			—			—			340			726			734			301
Fixed charges	$	12,953		$	10,979		$	10,068		$	9,081		$	4,339		$	5,584		$	5,437
Ratio of earnings to fixed charges		2.1	x		1.7	x		0.8	x		2.4	x		7.8	x		8.3	x		3.8	x
Fixed charges not covered by earnings	$	—		$	—		$	1,554		$	—		$	—		$	—		$	—

(1)	Before the cumulative effect of change in accounting principle.
(2)	Excludes capitalized interest and preferred dividend reported as interest expense.
(3)	Including amortized loan cost.