Example:
15 W/in² = 0.555689 cal(th)/s·cm²
1 W/in² = 0.037046 cal(th)/s·cm² | 1 cal(th)/s·cm² = 26.993494 W/in²
Conversion Steps:
15 × (1550.003101208 / 41839.999999942) = 0.555689448