Example:
15 J/s·m² = 0.07925 Btu/min·ft²
1 J/s·m² = 0.005283 Btu/min·ft² | 1 Btu/min·ft² = 189.275447 J/s·m²
Conversion Steps:
15 × (1 / 189.275446548) = 0.079249582