Inductance is the property of an electrical conductor by which a change in electric current through it induces an electromotive force (EMF) in both the conductor itself and in any nearby conductors. It is measured in Henry (H), named after American scientist Joseph Henry (1797-1878). One Henry equals one volt-second per ampere (V·s/A). Inductance is represented by the letter L in circuit diagrams and formulas.
Inductance Converter
Convert between Henry, millihenry, microhenry, nanohenry, picohenry, abhenry, stathenry and other inductance units with scientific precision.
Conversion Formula
1 Henry = 1000 millihenry
Common Inductance Conversions
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About Inductance
Inductance is a fundamental property of electrical circuits that describes the ability of a conductor to store energy in a magnetic field when electric current flows through it. Named after American scientist Joseph Henry, the SI unit of inductance is the Henry (H).
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SI Unit: Henry (H) One Henry equals one volt-second per ampere (V·s/A)
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Symbol: L Inductance is represented by the letter L in circuit diagrams
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Formula: V = L × (di/dt) Voltage induced equals inductance times rate of current change
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Energy Storage: E = ½LI² Energy stored in an inductor equals half inductance times current squared
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Applications Transformers, motors, generators, filters, RF circuits, power supplies
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CGS Units Abhenry (electromagnetic) and stathenry (electrostatic) for specialized calculations
All Inductance Units Explained
Our converter supports 19+ inductance units covering SI prefixes from attohenry to yottahenry, plus CGS electromagnetic and electrostatic units used in specialized scientific calculations.
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Henry (H) SI base unit. Used for large inductors in power systems and transformers.
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Millihenry (mH) 10⁻³ H. Common for audio frequency inductors and power supply filters.
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Microhenry (μH) 10⁻⁶ H. Most common unit for RF inductors and switching power supplies.
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Nanohenry (nH) 10⁻⁹ H. Used for high-frequency RF circuits and PCB trace inductance.
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Picohenry (pH) 10⁻¹² H. Used for parasitic inductances and component lead inductance.
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Abhenry (abH) CGS electromagnetic unit. 1 abH = 10⁻⁹ H. Used in theoretical physics.
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Stathenry (statH) CGS electrostatic unit. 1 statH ≈ 8.9876 × 10¹¹ H. Rare, specialized use.
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Kilohenry to Yottahenry SI prefixes for very large inductances (kH, MH, GH, TH, PH, EH, ZH, YH).
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Attohenry to Yoctohenry SI prefixes for extremely small inductances (aH, fH, zH, yH).
How to Use This Converter
Our inductance converter is engineered for speed, precision, and ease of use. Follow these steps to get accurate conversions instantly.
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Select Source Unit Choose the inductance unit you want to convert from (Henry, mH, μH, etc.)
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Select Target Unit Choose the inductance unit you want to convert to
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Enter Value Type your inductance value — the result appears instantly as you type
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View Formula The exact conversion formula is displayed below for verification
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Swap Units Click the swap button to instantly reverse the conversion direction
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Reference Table Use the common conversions table for quick reference values
Frequently Asked Questions
The SI unit of inductance is the Henry (H). One Henry is defined as the inductance of a circuit in which an electromotive force of one volt is produced when the electric current in the circuit changes at a rate of one ampere per second. The unit is named after Joseph Henry, who discovered electromagnetic induction independently around the same time as Michael Faraday.
To convert millihenry (mH) to microhenry (μH), multiply by 1000. For example, 5 mH = 5 × 1000 = 5000 μH. Conversely, to convert microhenry to millihenry, divide by 1000. This is because "milli" means 10⁻³ and "micro" means 10⁻⁶, so there are 1000 microhenries in one millihenry.
Abhenry is the CGS electromagnetic unit of inductance (1 abH = 10⁻⁹ H), while stathenry is the CGS electrostatic unit (1 statH ≈ 8.9876 × 10¹¹ H). They differ by a factor of approximately c² (speed of light squared, about 9 × 10²⁰). Abhenry is used in electromagnetic calculations, stathenry in electrostatic calculations. Both are rarely used today, having been largely replaced by the SI Henry.
Nanohenry (nH) is typically used for small inductors in RF circuits, filters, and high-frequency applications (1-1000 nH range). Picohenry (pH) is used for very small parasitic inductances, PCB traces, and component leads (1-1000 pH range). Choose the unit that gives you a convenient number between 1 and 1000 for your application.
The fundamental formula for inductance is V = L × (di/dt), where V is the induced voltage, L is the inductance, and di/dt is the rate of change of current. For a solenoid, inductance can be calculated as L = μ₀ × μᵣ × N² × A / l, where μ₀ is permeability of free space, μ is relative permeability, N is number of turns, A is cross-sectional area, and l is length.
Our converter delivers results accurate to 10 significant digits using conversion factors from official metrology institutes including NIST, BIPM, and the International Bureau of Weights and Measures. This level of precision is suitable for engineering calculations, scientific research, academic work, and professional applications.
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Inductance is fundamental to many electrical and electronic applications:
- Transformers — Transfer energy between circuits via magnetic coupling
- Electric motors — Convert electrical energy to mechanical energy
- Generators — Convert mechanical energy to electrical energy
- Filters — Block or pass specific frequency ranges
- RF circuits — Tune and match impedances in radio systems
- Power supplies — Store and release energy in switching converters
- Induction heating — Heat materials using electromagnetic induction
- Sensors — Detect position, proximity, and metal objects
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Several key features set us apart:
- Premium design with sidebar navigation and fluid animations
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- Real-time conversion — no submit button needed
- Formula explanations for educational value
- Common conversions table for quick reference
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