Solenoid Magnetic Field Calculator
Free calculate magnetic field strength inside a solenoid. determine b = μ₀ni for long solenoids. Get instant, accurate results with our easy-to-use calculator.
Input Parameters
Or enter total turns and length below
Leave blank if using turns per length
Results
Enter parameters to calculate magnetic field
Solenoid Magnetic Field Formula
Formula
B = μ₀μᵣnI
Where:
- • B = magnetic field (T)
- • μ₀ = 4π×10⁻⁷ T·m/A
- • μᵣ = relative permeability
- • n = turns per unit length
- • I = current (A)
Alternative
B = μ₀μᵣNI / l
Where N is total turns and l is length