Example:
15 Btu/min·ft² = 0.353713 hp/ft²
1 Btu/min·ft² = 0.023581 hp/ft² | 1 hp/ft² = 42.407226 Btu/min·ft²
Conversion Steps:
15 × (189.275446548 / 8026.64661743) = 0.353713304