Solenoid Magnetic Field Calculator
Estimate the magnetic field inside an ideal air-core solenoid.
Solenoid Magnetic Field measurements
Enter your values, then calculate.
Result
How to calculate solenoid magnetic field
Estimate the interior magnetic flux density of a long air-core solenoid.
How the calculation works
For an ideal solenoid, B = μ₀NI/L. The calculator uses vacuum permeability and converts teslas to milliteslas.
Example
A 500-turn coil carrying 2 A over 0.4 m produces an ideal field of about 3.142 mT.
Frequently asked questions
Why may a measured field differ?
End effects, winding spacing, core material, heating, and measurement position make real coils differ from the ideal model.
Solenoid Magnetic Field Calculator
For an ideal solenoid, B = μ₀NI/L. The calculator uses vacuum permeability and converts teslas to milliteslas.
Let's understand your solenoid magnetic field result.
Calculate a result above and this guide will help you interpret it using this calculator's own formula and explanation.
Pro Tips for Solenoid Magnetic Field
- Measure coil length along the wound section.
- Use a magnetic-core model when permeability is much greater than air.
Common Solenoid Magnetic Field Mistakes to Avoid
- Applying the air-core equation to a short or iron-core coil can produce a poor estimate.
When to Use This Calculator
Estimate the interior magnetic flux density of a long air-core solenoid.