Inductance converter
Convert mH to µH — millihenry to microhenry
Convert millihenries (mH) to microhenries (µH) instantly. 1 mH = 1,000 µH. Free calculator with formula, conversion table, and H base-unit equivalent.
Also searched as: mH to uH, milli henry to micro henry, milli to micro henry, milli henrys to micro henrys.
- Scientific Notation
- 4.7 × 10³ µH
- Real-World Context
- 1 mH is roughly the inductance of an audio crossover coil
- Step-by-Step
- 1. Start with 4.7 mH. 2. Since 1 milli-unit = 1,000 micro-units, multiply by 1,000. 3. 4.7 × 1,000 = 4,700 µH.
- Formula Used
- × 1,000 (milli = 10⁻³, micro = 10⁻⁶)
Quick Conversions
| Mega | 4.7 × 10⁻⁹ MH |
|---|---|
| Kilo | 0.0000047 kH |
| Base Unit (henries) | 0.0047 henries |
| Nano | 4,700,000 nH |
| Pico | 4.7 × 10⁹ pH |
Quick mH to µH answer
1 mH = 1,000 µH
multiply by 1,000
4.7 mH = 4,700 µH
millihenry to microhenry formula
Milli is 10^-3 and micro is 10^-6. They are three powers of ten apart, so every mH to µH conversion uses the exact factor 1,000.
µH = mH × 1,000
4.7 mH × 1,000 = 4,700 µHmH to µH table
Common values for millihenries converted to microhenriesand the base unit (H).
| millihenries | microhenries | henries |
|---|---|---|
| 0.001 mH | 1 µH | 0.000001 H |
| 0.01 mH | 10 µH | 0.00001 H |
| 0.1 mH | 100 µH | 0.0001 H |
| 1 mH | 1,000 µH | 0.001 H |
| 2 mH | 2,000 µH | 0.002 H |
| 5 mH | 5,000 µH | 0.005 H |
| 10 mH | 10,000 µH | 0.01 H |
| 20 mH | 20,000 µH | 0.02 H |
| 50 mH | 50,000 µH | 0.05 H |
| 100 mH | 100,000 µH | 0.1 H |
| 1,000 mH | 1,000,000 µH | 1 H |
Understanding millihenries and microhenries
A millihenry (mH) is 10⁻³ of the base unit (henry) and a microhenry (µH) is 10⁻⁶. They sit three powers of ten apart, so going from mH to µH means multiplying by exactly 1,000 — move the decimal point three places to the right.
Millihenries belong to mains-frequency and audio parts: chokes, crossover coils, transformer leakage and magnetising inductance. A 1 mH inductor presents about 0.38 Ω of reactance at 60 Hz, which is why mH is the natural unit once you are working near line frequency.
This calculator shifts the decimal exponent rather than multiplying in binary floating point, so 4.7 mH returns exactly 4,700 µH — not a value with a trailing rounding error.
Common mH to µH mistake
An inductor's marked value applies below its saturation current. Converting mH to µH cleanly and then ignoring the saturation rating gives an inductance that collapses under load — the arithmetic is exact, the part is not.
When to use mH vs µH
millihenries and microhenries are used for coils, filters, switching converters, RF circuits, and inductor datasheets. Use the larger milli unit when the number becomes easier to scan, and the smaller micro unit when you need finer detail.