How to use the solenoid magnetic field calculator
Compute magnetic field inside a solenoid. Enter number of turns, length, current in the fields above; the magnetic field is computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- N — Number of turns
- L — Length (cm)
- I — Current (A)
Worked example
With number of turns = 500, length = 10 cm, current = 2 A, the calculator gives magnetic field ≈ 12.56637 mT.
Frequently asked questions
What is the formula for the solenoid magnetic field calculation?
Magnetic field (mT) = MU0 × N / (L / 100) × I × 1000. Here N is number of turns, L is length (cm), I is current (A).
What inputs do I need for the solenoid magnetic field calculator?
You need number of turns, length in cm, current in A. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.