Magnetic field of coils

Version 1.01 (1.62 MB) by Duncan Carlsmith
Profiles the magnetic field along a selectable curve for a helical (solenoidal or toroidal) current loop using the Biot-Savart law.
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Updated 9 Feb 2026

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Profiles the magnetic field along a selectable curve for a helical (solenoidal or toroidal) current loop using the Biot-Savart law. The Biot-Savart line integral is represented first symbolically in terms of a parametric path in three dimensions, then converted to a function of the parameter and integrated numerically. The results are compared to analytic results for an ideal solenoid or toroid.

Cite As

Duncan Carlsmith (2026). Magnetic field of coils (https://www.mathworks.com/matlabcentral/fileexchange/107874-magnetic-field-of-coils), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2021b
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes
1.01

Added interactive_examples tag
1.0.4

Spell check
1.0.3

Minor fix.
1.0.2

Added comparison of finite solenoidal coil axial field to ideal.
1.0.1

Minor fixes for single turn helices.
1.0.0