Convert magnetic flux density B between tesla, millitesla, gauss, gamma, and Wb/m², then compare SI and CGS expressions side by side.
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Magnetism Units
A magnetic flux density converter helps when sources switch between tesla-based SI notation and gauss-based CGS notation. This page stays focused on magnetic flux density B, keeping it separate from magnetic field strength H and from total magnetic flux through an area.
Magnetic flux density B describes magnetic flux per unit area and is commonly reported in tesla in SI work. It is the quantity most often used for field intensity measurements, sensor ranges, and practical magnet specifications.
That is different from magnetic field strength H, which reflects magnetizing force, and different again from total magnetic flux in weber. Keeping those quantities separate is necessary for honest unit conversion.
Modern SI usage is tesla-first, often scaled to millitesla, microtesla, or nanotesla. Older magnetics references, Earth-field discussions, and some component data still use gauss, milligauss, or gamma.
A converter is useful because those labels remain common across different domains, and the decimal factors are easy to mistype when moving quickly between notes, dashboards, and reports.
1 T = 10,000 G
Core SI-to-CGS relationship between tesla and gauss.
1 γ = 1 nT
Shows the correspondence between the gamma label and nanotesla scale.
If the real problem involves material response, permeability, or converting between B and H, you need more than a unit change. Those steps require physical assumptions or separate measurements.
This page is therefore best used as a notation bridge for reporting and reference work rather than as a full magnetic-design model.
Frequently asked questions
Yes. They are both units of magnetic flux density B. Tesla is the SI unit, while gauss is the legacy CGS expression.
Gamma is an older small-scale field label commonly treated as equal to 1 nanotesla. It still appears in some geomagnetic and legacy instrument contexts.
No. Converting between magnetic flux density and magnetic field strength needs permeability or other physical context. This page converts B units only.
Because tesla is exactly equivalent to weber per square metre in SI. Showing both helps users connect the field label to the underlying flux-per-area definition.
Related
These related calculators come from the same leaf category, nearby sibling categories, or the same top-level topic.
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