Millihenry Conversion Tool - Convert Millihenries to Any Unit
Convert Millihenries to Other Units
Quick Conversions
Convert Other Units to Millihenries
Quick Conversions
Related Inductance Units
Millihenry Conversion Table
This comprehensive millihenry conversion table shows how various units relate to millihenries. Use this reference for quick conversions between millihenries and other common inductance units.
| Conversion | To Unit | Multiplier |
|---|---|---|
| Millihenries to henries | Henries | 0.001 |
| Millihenries to microhenries | Microhenries | 1000 |
| Millihenries to nanohenries | Nanohenries | 1000000 |
| Millihenries to picohenries | Picohenries | 1000000000 |
This millihenry conversion reference table provides accurate conversion factors for inductance units. All values are based on internationally recognized standards for maximum precision in electrical engineering applications.
What is a Millihenry?
The millihenry (symbol: mH) is a unit of electrical inductance in the International System of Units (SI), equal to one thousandth (10⁻³) of a henry. Inductance is the property of an electrical conductor by which a change in electric current induces an electromotive force (voltage) in the conductor or in a nearby conductor.
The millihenry is commonly used in electronics and electrical engineering to measure the inductance of components such as inductors, transformers, and motors. Our millihenry conversion tool helps you easily convert between millihenries and other inductance units. For example, 1 millihenry equals 1000 microhenries or 0.001 henries.
What is the SI of Millihenry?
The millihenry is a decimal fraction of the SI derived unit of inductance, the henry (H). It is not itself an SI base unit but is accepted for use with the SI. The henry is defined as the inductance of a closed loop that produces an electromotive force of one volt when the current changes at a rate of one ampere per second. All other inductance units in the metric system are derived from the henry:
- Henry (H) = 1000 millihenries
- Millihenry (mH) = 0.001 henries
- Microhenry (µH) = 0.001 millihenries
- Nanohenry (nH) = 0.000001 millihenries
- Picohenry (pH) = 0.000000001 millihenries
What are Millihenries Used For?
Millihenries are used in a wide range of applications across electrical engineering, electronics design, and power systems. As a common unit for measuring inductance, millihenries provide a convenient scale for many practical components:
Electronics & Circuit Design
Measuring inductors in power supplies, filters, and oscillators. For example, a typical power supply inductor might be 100 millihenries to smooth out voltage fluctuations.
Audio Equipment
Speaker crossover networks and transformers where inductors shape frequency response. For example, a woofer crossover inductor might be 2.2 millihenries to filter high frequencies.
Motor Control Systems
Measuring motor winding inductance for speed control and efficiency calculations. For example, a small DC motor might have winding inductance of 5 millihenries.
Power Electronics
In switching power supplies and inverters where inductors store and release energy. For example, a flyback transformer primary inductance might be 10 millihenries.
Etymology and History
The term "henry" is named after American physicist Joseph Henry (1797-1878), who discovered electromagnetic induction independently of and around the same time as Michael Faraday in England. The henry was officially adopted as the SI unit of inductance in 1948 by the General Conference on Weights and Measures.
The millihenry, being one thousandth of a henry, became a practical unit for many common electrical components. Its adoption followed the general metric system's decimal structure, making calculations and conversions straightforward in electrical engineering applications. This naming convention reflects the standard practice of honoring scientists in the SI system.
Frequently Asked Questions
Why is the millihenry used instead of the henry?
The millihenry is used because many practical inductors and electrical components have inductances in the millihenry range, making it a convenient scale. For example, audio crossover inductors typically range from 0.1 to 10 millihenries, while power supply inductors are often in the 10 to 1000 millihenry range. Using millihenries avoids excessive decimal places in common measurements.
How accurate is the millihenry definition?
The millihenry is defined as exactly 0.001 henries, so its accuracy depends on the definition of the henry. The henry is precisely defined in terms of fundamental physical constants (meter, kilogram, second, and ampere), making millihenry conversions highly accurate. This precision is essential for engineering applications where exact component values are critical.
What's the difference between millihenry and microhenry?
The difference is a factor of 1000. One millihenry (mH) equals 1000 microhenries (µH). Millihenries are used for larger inductors (like power supply chokes), while microhenries are used for smaller components (like RF inductors). Our mH to µH converter makes switching between these units simple.
How do I convert millihenries to other units?
Use our millihenry conversion calculators above, or multiply by the appropriate conversion factor. To convert millihenries to henries, divide by 1000; to convert to microhenries, multiply by 1000. For detailed instructions on converting millihenries to henries, visit our mH to H converter.
What are common uses for millihenry conversion?
Millihenry conversion is essential in electronics design (component selection), circuit analysis (impedance calculations), power systems (transformer design), and RF engineering (filter design). Whether calculating inductor values for a power supply or designing a crossover network, our millihenry converter tool simplifies these engineering tasks.
How does millihenry conversion differ from other inductance units?
As a decimal fraction of the SI unit henry, millihenry conversion follows the metric system's powers of ten. This makes conversions straightforward compared to non-SI units. All inductance units in the metric system are related by factors of 1000: 1 henry = 1000 millihenries = 1,000,000 microhenries, etc.
Can I convert very small or very large measurements in millihenries?
Yes, our millihenry converter handles both extremely small and large measurements with precision. For RF work, convert nanohenries to millihenries (1 nH = 0.000001 mH). For large inductors, convert henries to millihenries (1 H = 1000 mH). Our smart rounding feature ensures readable results for all scales.
Is your millihenry conversion tool free to use?
Yes, our millihenry conversion calculator is completely free with no registration required. Simply enter your value, select your target unit, and get instant, accurate results. We believe precise measurement conversion should be accessible to everyone, from students learning electronics to professionals working on complex circuit designs.