CalcKit
Inductance Converter
Inductance (L) is how strongly a coil or conductor opposes a change in the current through it. A changing current builds a changing magnetic field, which induces a voltage that pushes back: V = L * ΔI / Δt. Its SI unit is the henry (H).
Real inductors are small fractions of a henry: microhenries (µH) in radio and switch-mode power supplies, millihenries (mH) in audio crossovers and filters.
How to convert inductance units
Type a value into any field, and every other unit is calculated at once. Each metric prefix is a factor of 1,000. For example, a 4.7 mH coil:
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In henries: divide by 1,000.
4.7 / 1,000 = 0.0047 H -
In microhenries: multiply by 1,000.
4.7 × 1,000 = 4,700 µH
Common conversions
| Value | Equals |
|---|---|
| 1 H | 1,000 mH |
| 1 mH | 0.001 H |
| 1 mH | 1,000 µH |
| 1 µH | 0.001 mH |
| 1 µH | 1,000 nH |
| 1 nH | 0.001 µH |
| 1 µH | 1 × 10⁻⁶ H |
The Inductive Reactance Calculator finds what an inductance means at a given frequency, in ohms.
Inductance units
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Henry (H): The henry is the SI unit of inductance: a conductor has an inductance of one henry when a current changing by one ampere per second induces an electromotive force of one volt across it.
Conversion Factor: 1 H = 1 V·s/A -
Kilohenry (kH): A kilohenry is equal to one thousand henrys.
Conversion Factor: 1 kH = 1,000 H -
Megahenry (MH): A megahenry is equal to one million henrys.
Conversion Factor: 1 MH = 1,000,000 H -
Millihenry (mH): A millihenry is equal to one-thousandth of a henry.
Conversion Factor: 1 mH = 10^-3 H = 0.001 H -
Microhenry (μH): A microhenry is equal to one-millionth of a henry.
Conversion Factor: 1 μH = 10^-6 H = 0.000001 H -
Nanohenry (nH): A nanohenry is equal to one-billionth of a henry.
Conversion Factor: 1 nH = 10^-9 H = 0.000000001 H -
Weber / Ampere (Wb/A): The weber per ampere is an alternate unit for inductance, defined as the magnetic flux linkage per ampere of current.
Conversion Factor: 1 Wb/A = 1 H -
Abhenry (abH): The abhenry is an electromagnetic unit of inductance used in the CGS (centimeter-gram-second) system.
Conversion Factor: 1 abH = 10^-9 H -
EMU of Inductance (EMU): The electromagnetic unit (EMU) of inductance is equivalent to the abhenry unit.
Conversion Factor: 1 EMU = 1 abH -
Stathenry (statH): The stathenry is another unit of inductance in the CGS system.
Conversion Factor: 1 statH ≈ 8.98755 * 10^11 H -
ESU of Inductance (ESU): The electrostatic unit (ESU) of inductance is equivalent to stathenry.
Conversion Factor: 1 ESU = 1 statH