Poynting Vector Magnitude Calculator
Poynting Vector Magnitude Calculator computes the magnitude of the Poynting vector for a plane electromagnetic wave in free space. Input the electric and magnetic field magnitudes, select their units, and calculate the Poynting vector magnitude.
Enter Parameters
How to Use Poynting Vector Magnitude Calculator:
- Enter the electric and magnetic field magnitudes using the keypad or direct input; use “Next” to switch fields.
- Select appropriate units for each parameter (e.g., V/m, mV/m, µV/m for electric field; T, µT, nT for magnetic field).
- Click “Calculate” to see step-by-step results.
- Use “Share Result” to get shareable text or “Copy Result” to copy to clipboard.
Formula:
Poynting Vector Magnitude (S):
S = (1 / μ₀) × |E| × |B|
Where: μ₀ = permeability of free space (4π × 10⁻⁷ H/m), |E| = electric field magnitude (V/m), |B| = magnetic field magnitude (T)
Important Notes:
- Inputs for electric and magnetic field magnitudes must be positive numbers. Invalid inputs will trigger an error.
- The calculator assumes a plane electromagnetic wave in free space with perpendicular electric and magnetic fields.
- The Poynting vector magnitude represents the power per unit area carried by the wave (W/m²).
- Clipboard access requires a secure context (HTTPS). If copying fails, try accessing over HTTPS or copy manually.