Radiation Pressure Calculator
Free calculate pressure exerted by electromagnetic radiation on absorbing or reflecting surfaces. Get instant, accurate results with our easy-to-use calculator.
Input Parameters
Solar constant ≈ 1,361 W/m²
Results
Enter intensity to calculate pressure
Radiation Pressure Formula
Perfectly Absorbing Surface
P = I / c
Where:
- • P = radiation pressure (Pa)
- • I = intensity (W/m²)
- • c = speed of light (3×10⁸ m/s)
Perfectly Reflecting Surface
P = 2I / c
Where:
- • P = radiation pressure (Pa)
- • I = intensity (W/m²)
- • c = speed of light (3×10⁸ m/s)
- • Factor of 2 from momentum reversal