Magnetic Flux Density Converter

Convert between different units of magnetic flux density measurement including tesla, gauss, weber per square meter, gamma, and more. Essential for physics, engineering, and magnetic field applications.

From:

To:

Magnetic Flux Density Value to Convert:

Common Magnetic Flux Density Conversions

SI Units:

• 1 T = 1 Wb/m² = 1 V⋅s/m²

• 1 mT = 0.001 T

• 1 μT = 0.000001 T

• 1 nT = 10⁻⁹ T

CGS Units:

• 1 T = 10,000 G

• 1 G = 0.0001 T

• 1 kG = 0.1 T

• 1 γ = 1 nT (gamma)

Natural Fields:

• Earth's field: ~25-65 μT

• Refrigerator magnet: ~5 mT

• MRI machine: 1.5-3 T

• Neutron star: ~10⁸ T

Laboratory Fields:

• Permanent magnets: 0.1-1.4 T

• Superconducting magnets: 1-20 T

• Record lab field: >100 T

• NMR/ESR: 0.1-21 T typical

🧲 Magnetic Field Fundamentals

B-field (Magnetic Flux Density): Force per unit current per unit length

H-field (Magnetic Field Strength): B-field divided by permeability

Relationship: B = μ₀μᵣH (μ₀ = 4π × 10⁻⁷ H/m)

Force on moving charge: F = q(v × B)

Force on current: F = I(L × B)

🔬 Applications by Field Strength

• fT-pT: Quantum sensors, SQUID devices

• nT-μT: Geomagnetic surveys, navigation

• μT-mT: Biomagnetism, metal detection

• mT-T: Industrial magnets, motors

• T-10T: MRI, research magnets

• >10T: High-field research, fusion

⚡ Electromagnetic Induction

Faraday's Law: EMF = -dΦ/dt (Φ = magnetic flux)

Magnetic Flux: Φ = B⋅A = BA cos(θ)

Lenz's Law: Induced current opposes flux change

Motional EMF: EMF = BLv (conductor moving in field)

🌍 Earth's Magnetic Field

Total Field: ~25-65 μT (varies by location)

Horizontal Component: ~20-30 μT at mid-latitudes

Vertical Component: 0 at equator, ±60 μT at poles

Declination: Angle between magnetic and true north

Inclination: Dip angle from horizontal

⚠️ High Magnetic Field Safety

Ferromagnetic Objects: Can become dangerous projectiles

Pacemakers: Can malfunction in fields >0.5 mT

Credit Cards: Data erased by ~4 mT fields

Watches: Mechanical watches affected by ~1 mT

MRI Safety: Strict protocols for >1 T fields

🔬 Measurement Techniques

Hall Effect Sensors: 1 μT to 30 T range

Fluxgate Magnetometers: nT sensitivity, DC fields

SQUID Devices: fT sensitivity, research applications

Search Coils: AC fields, induction-based

NMR Gaussmeters: High accuracy, T-scale fields

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