How to Convert Kilohenries to Henries
To convert an inductance measurement from kilohenries to henries, multiply the inductance value by the conversion factor. Since one kilohenry is equal to 1,000 henries, you can use this formula:
The inductance in henries is equal to the kilohenries multiplied by 1,000.
Using the formula: henries = kilohenries × 1,000
henries = 5 kH × 1,000 = 5,000 H
Therefore, 5 kilohenries equals 5,000 henries.
How Many Henries Are in a Kilohenry?
There are 1,000 henries in one kilohenry.
What Is a Kilohenry?
The kilohenry (symbol: kH) is a unit of electrical inductance equal to one thousand (103) henries. The prefix “kilo” denotes a factor of 1,000 in the International System of Units. The kilohenry is a very large unit of inductance that is rarely encountered in practical electronics. Most physical inductors have inductance values well below one henry, making the kilohenry an unusual unit for real-world components. However, the kilohenry can appear in theoretical calculations, in some power grid modelling scenarios, and when describing the effective inductance of very large electromagnetic systems. Superconducting magnetic energy storage (SMES) systems, which store energy in the magnetic field of a superconducting coil, can have inductance values approaching the kilohenry range. In education and theoretical physics, the kilohenry serves as a reference point for understanding the scale of inductance, helping to contextualise the very small inductance values (microhenries, millihenries) encountered in practical electronics.
One kilohenry is equal to:
- 1,000 henries (H)
- 106 millihenries (mH)
- 109 microhenries (μH)
- 1012 abhenries (abH)
- 0.001 megahenries (MH)
What Is a Henry?
The henry (symbol: H) is the SI derived unit of electrical inductance, named after the American scientist Joseph Henry who independently discovered electromagnetic induction around the same time as Michael Faraday. One henry is defined as the inductance of a circuit in which an electromotive force (EMF) of one volt is produced when the current through the circuit changes at a rate of one ampere per second (1 H = 1 V·s/A = 1 kg·m²/(s²·A²)). In practical terms, one henry is a very large inductance. Most electronic components have inductance values measured in millihenries (μH) or microhenries (mH). However, large power transformers and reactor coils can have inductance values of several henries. Inductance is the property of an electrical conductor that opposes a change in current flowing through it. When current flows through a conductor, it creates a magnetic field around it. If the current changes, the magnetic field changes, which induces a voltage that opposes the change (Lenz’s law). This self-induced voltage is proportional to the rate of change of current, with the proportionality constant being the inductance. The henry is also used to measure mutual inductance between two conductors, where a change in current in one conductor induces a voltage in the other.
One henry is equal to:
- 1,000 millihenries (mH)
- 1,000,000 microhenries (μH)
- 109 abhenries (abH)
- 1.1127 × 10−12 stathenries (stH)
- 0.001 kilohenries (kH)
Understanding Electrical Inductance Units
Inductance is the property of an electrical conductor by which a change in current flowing through it induces an electromotive force (EMF) in the conductor itself (self-inductance) or in a nearby conductor (mutual inductance). It is one of the fundamental quantities in electromagnetism, along with resistance and capacitance.
The physical basis of inductance is Faraday’s law of electromagnetic induction: a changing magnetic field induces an electric field. When current flows through a conductor, it creates a magnetic field. If the current changes, the magnetic field changes, which induces a voltage that opposes the change in current (Lenz’s law). The ratio of the induced voltage to the rate of current change is the inductance.
Major Unit Families
- SI units: The henry (H) is the SI unit of inductance, with standard metric prefixes: μH (microhenry, 10−6 H), mH (millihenry, 10−3 H), kH (kilohenry, 103 H), MH (megahenry, 106 H), GH (gigahenry, 109 H).
- CGS-EMU: The abhenry (abH) is the inductance unit in the CGS electromagnetic system. 1 abH = 10−9 H = 1 nanohenry. It is a very small unit.
- CGS-ESU: The stathenry (stH) is the inductance unit in the CGS electrostatic system. 1 stH ≈ 8.988 × 1011 H. It is an enormously large unit due to the factor of c² in the conversion.
Inductance in Practice
- Electronic components: Chip inductors: 0.001–1,000 μH. Power inductors: 0.1–100 mH. Transformers: 0.01–100 H.
- Parasitic inductance: PCB traces: ~1 nH/cm. IC bond wires: 1–5 nH. Through-hole vias: 0.5–2 nH.
- Audio equipment: Speaker voice coils: 0.5–3 mH. Crossover network inductors: 0.1–10 mH.
- Power systems: Large power transformers: 0.1–10 H. Reactor coils: 0.01–1 H.
Converting Between Inductance Units
All inductance units measure the same physical quantity, so converting between them is a matter of multiplying by the appropriate conversion factor. For SI prefix conversions, each step is a factor of 1,000. The CGS conversions involve fixed factors: 1 abH = 10−9 H (exact) and 1 stH = c² × 10−9 H (where c ≈ 2.998 × 1010 cm/s).
Tips for Inductance Conversions
- For SI metric conversions (μH, mH, H, kH, MH, GH), each prefix step is a factor of 1,000.
- The abhenry equals exactly 10−9 henries, which is the same as 1 nanohenry (nH). This makes conversion straightforward.
- The stathenry is enormous: 1 stH ≈ 899 billion henries. The conversion factor involves the speed of light squared (c²).
- The ratio of 1 stathenry to 1 abhenry is c² (in CGS units) ≈ 8.988 × 1020. This reflects the fundamental relationship between electrostatic and electromagnetic units.
- Most practical electronic inductors have values between 0.01 μH and 100 mH. Very few components exceed 10 H.
- When reading component datasheets, pay attention to whether the inductance is in μH, mH, or H. A factor-of-1,000 error can be catastrophic in circuit design.
- In RF (radio frequency) circuits, inductance values are typically in the 0.1–100 μH range. In power electronics, they are typically 1–100 mH.
Kilohenries to Henries Conversion Table
The following table shows conversions from kilohenries to henries.
| Kilohenries | Henries (H) |
|---|---|
| 1 kH | 1,000 |
| 2 kH | 2,000 |
| 3 kH | 3,000 |
| 4 kH | 4,000 |
| 5 kH | 5,000 |
| 6 kH | 6,000 |
| 7 kH | 7,000 |
| 8 kH | 8,000 |
| 9 kH | 9,000 |
| 10 kH | 10,000 |
| 11 kH | 11,000 |
| 12 kH | 12,000 |
| 13 kH | 13,000 |
| 14 kH | 14,000 |
| 15 kH | 15,000 |
| 16 kH | 16,000 |
| 17 kH | 17,000 |
| 18 kH | 18,000 |
| 19 kH | 19,000 |
| 20 kH | 20,000 |
| 21 kH | 21,000 |
| 22 kH | 22,000 |
| 23 kH | 23,000 |
| 24 kH | 24,000 |
| 25 kH | 25,000 |
| 26 kH | 26,000 |
| 27 kH | 27,000 |
| 28 kH | 28,000 |
| 29 kH | 29,000 |
| 30 kH | 30,000 |
| 31 kH | 31,000 |
| 32 kH | 32,000 |
| 33 kH | 33,000 |
| 34 kH | 34,000 |
| 35 kH | 35,000 |
| 36 kH | 36,000 |
| 37 kH | 37,000 |
| 38 kH | 38,000 |
| 39 kH | 39,000 |
| 40 kH | 40,000 |