开
Inductance Conversion
Tool Description
Inductance Conversion is an online inductance unit converter that supports mutual conversion between henry (H), millihenry (mH), microhenry (μH), nanohenry (nH), picohenry (pH), kilohenry (kH), and megahenry (MH). Enter any value and unit to instantly view corresponding results in all other units, suitable for electronic circuit design, RF engineering, EMC, power systems, and more.
How to Use
- Enter value
Enter the inductance value to convert in the input field, supporting integers and decimals, e.g.,
100or0.047 - Select source unit
Choose the inductance unit of the current value from the dropdown list (H, mH, μH, nH, pH, kH, MH)
- View results
Click the Convert button or press Enter, and the result area below will display corresponding values in all units, with a copy button on the right of each result for easy use
Use Cases
- Electronic circuit design: Inductors in circuits are often labeled in μH, mH, nH, etc. Schematic and PCB design requires frequent unit conversions; this tool enables quick conversion
- RF & communication engineering: Inductance values for matching networks and filters in RF circuits are typically in the nH range (e.g., 2.2 nH, 4.7 nH), while low-frequency power filter inductors are in the μH~mH range. Use this tool to quickly switch between different scales
- Power systems & transformers: Large power transformers and reactors have inductance values typically in the H~kH range. Different countries and standards may use different units; use this tool for quick comparison and conversion
Core Advantages
- Free Daily Uses
The tool gives you free daily uses with no software to download or install; open the page and start converting inductance units. For higher volume or more frequent use, become a member to unlock more quota
- Privacy & security
All conversions are done locally in your browser; input data is never uploaded to a server, fully protecting your privacy
- Simple to use
Just enter a value and select a unit to get results for all units at once, which can be copied quickly
- Instant conversion
All units update in real time; results appear instantly when you input or switch units, with no waiting
- Full unit coverage
Covers 7 units: henry (H), millihenry (mH), microhenry (μH), nanohenry (nH), picohenry (pH), kilohenry (kH), and megahenry (MH)
- Precise conversion
Based on strict decimal thousand-fold relationships with no approximate errors, results are precise within floating-point limits
Inductance Unit Conversion Relationships
The following shows the conversion relationships between inductance units, with henry (H) as the base unit:
| Unit Name | Abbreviation | Conversion Relationship | Equivalent H |
|---|---|---|---|
| Henry | H | 1 H = 1 Wb/A | 1 |
| Millihenry | mH | 1 mH = 0.001 H | 0.001 |
| Microhenry | μH | 1 μH = 10⁻⁶ H | 0.000001 |
| Nanohenry | nH | 1 nH = 10⁻⁹ H | 0.000000001 |
| Picohenry | pH | 1 pH = 10⁻¹² H | 0.000000000001 |
| Kilohenry | kH | 1 kH = 1,000 H | 1,000 |
| Megahenry | MH | 1 MH = 1,000,000 H | 1,000,000 |
Common Inductance Value Reference
The following shows common inductance value ranges in different application scenarios for reference comparison:
| Application | Typical Inductance |
|---|---|
| RF matching network | 1 nH ~ 100 nH |
| HF choke/decoupling | 100 nH ~ 10 μH |
| SMPS energy storage inductor | 1 μH ~ 100 μH |
| EMI common-mode choke | 100 μH ~ 10 mH |
| Audio crossover network | 1 mH ~ 100 mH |
| Power transformer | 100 mH ~ 10 H |
| Large reactor | 10 H ~ 数百 H |
Definition and Physical Meaning of Inductance
Inductance (symbol L) is the ability of a conductor to generate induced electromotive force when the current changes, measuring a coil''s electromagnetic induction capability. The SI unit of inductance is the henry (symbol H), named after American physicist Joseph Henry. 1 henry is defined as the inductance of a coil that produces 1 volt of induced EMF when the current changes at a rate of 1 ampere per second, i.e., 1 H = 1 V·s/A = 1 Wb/A.
Inductance is one of the most fundamental passive components in electronic circuits, alongside resistance and capacitance as the three major passive components. The roles of inductance in circuits include: energy storage (storing energy in the form of a magnetic field, E = ½LI²), filtering (opposing current changes, passing DC and blocking AC), resonance (forming LC resonant circuits with capacitors, resonant frequency f = 1/(2π√LC)), and impedance matching (achieving maximum power transfer in RF circuits). Inductance unit conversions are based on strict decimal thousand-fold relationships (1 H = 10³ mH = 10⁶ μH = 10⁹ nH = 10¹² pH), fully consistent with metric unit prefixes.
FAQ
The henry (symbol H) is the SI standard unit of inductance, named after American physicist Joseph Henry (1797-1878). 1 henry is defined as: when the current in a coil changes uniformly at a rate of 1 ampere per second, if 1 volt of induced EMF appears across the coil terminals, the inductance is 1 henry, i.e., 1 H = 1 V·s/A = 1 Wb/A. The henry is a fundamental unit in electromagnetism; Joseph Henry''s discoveries in electromagnetic induction were nearly simultaneous with Faraday''s but were made independently.
Inductance units follow strict decimal thousand-fold relationships: 1 H = 1,000 mH = 1,000,000 μH = 1,000,000,000 nH = 1,000,000,000,000 pH. Specifically: 1 mH = 1,000 μH = 1,000,000 nH; 1 μH = 1,000 nH = 1,000,000 pH; 1 nH = 1,000 pH. For example, a 4.7 μH inductor = 4,700 nH = 4,700,000 pH. This thousand-fold relationship is fully consistent with metric unit prefixes (milli-, micro-, nano-, pico-).
In electronic circuits, 1 henry (H) is a relatively large inductance value. Common inductor components are mostly in the μH and nH ranges: matching networks and filters in RF circuits commonly use nH range (e.g., 1~100 nH), energy storage inductors in switching power supplies commonly use μH range (e.g., 10~1000 μH), and crossover inductors in audio circuits commonly use mH range (e.g., 0.1~10 mH). Only in large power equipment do H-level inductors appear. Inductors above 1 H are bulky and expensive, unsuitable for ordinary PCB boards.
Color-coded inductors use a marking method similar to color-coded resistors, with the unit being μH. Typically there are 4 bands: the first two bands represent significant digits, the third band represents the multiplier (power of 10), and the fourth band represents tolerance (gold ±5%, silver ±10%). For example: brown-black-red-silver = 10 × 10² μH = 1,000 μH = 1 mH, tolerance ±10%; red-red-brown-gold = 22 × 10¹ μH = 220 μH, tolerance ±5%. Some inductors also use a three-digit marking method (similar to capacitors), e.g., "101" = 100 μH.
No. All conversion calculations are performed entirely in your browser locally using pure JavaScript math. Your input data never leaves your device, so please feel free to use it.
This tool uses JavaScript double-precision floating-point numbers (64-bit IEEE 754) for calculations, which is sufficiently accurate for most everyday scenarios. Inductance units follow strict decimal thousand-fold relationships (1 H = 10³ mH = 10⁶ μH = 10⁹ nH = 10¹² pH) with no approximate conversions, so conversion results are precise within floating-point limits. Up to 6 significant decimal places are retained, with excess digits automatically truncated.
Very simple.Enter the inductance value to convert, select its unit from the dropdown, click the Convert button or press Enter, and the result area will immediately list the converted values for all 7 units (H, mH, μH, nH, pH, kH, MH). Each result has a copy button on the right to copy that value individually.
7 units in total.They include henry (H), millihenry (mH), microhenry (μH), nanohenry (nH), picohenry (pH), kilohenry (kH), and megahenry (MH), covering all common scales from picohenry to megahenry to meet conversion needs in RF, power, and electrical fields.
No registration needed.This is a free online tool that works as soon as you open the page, without login or account binding. We provide free daily usage quota; light daily conversion needs can be met at zero cost, while higher quotas or more frequent use can be unlocked by becoming a member.
Yes.The page is responsive and works properly on phones, tablets, and desktop browsers. Conversion on mobile is also done locally, so you can use it anytime, anywhere without worrying about network transmission.
More focused and hassle-free.Unlike general-purpose unit converters, this tool is designed specifically for inductance: one input yields results for all 7 units at once, saving repeated switching. All calculations are done locally, protecting privacy and responding fast, and it is completely free with no installation.
You will be prompted to re-enter.When the input is empty or non-numeric, the tool shows prompts like "Please enter a value" or "Please enter a valid number" and does not perform conversion. Only regular numeric values (integers, decimals, and scientific notation) are supported; letters, unit symbols, and other non-numeric content are not accepted. Please confirm the input is a pure number and try again.
Content last updated：2026-07-17
Byte Converter
Online byte unit conversion tool, supporting quick and accurate conversion between bit, B, KB, MB, GB, TB, PB, and IEC standard units, meeting data conversion needs with precision and efficiency.
Length Conversion
Online length unit conversion, supporting quick interchange between metric, imperial, and traditional Chinese units.
Time Conversion
Time Conversion - Precise online time unit conversion, supporting fast interconversion between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, months, and years, helping you efficiently process time data.
Angle Conversion
Online angle unit conversion tool, supporting quick and accurate conversion between degrees, radians, gradians, minutes of arc, seconds of arc, milliradians, microradians, and circles, meeting various angle calculation needs with precision and efficiency.
Energy Conversion
Online energy unit conversion tool, supporting fast interconversion between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, electronvolts, British thermal units, foot-pounds, and more. Accurate and efficient, helping you easily complete energy conversions.
Pressure Conversion
Pressure Conversion - Online pressure unit conversion tool, supporting Pa, hPa, kPa, MPa, bar, mbar, atm, mmHg, inHg, psi, kgf/cm² and other units for one-click conversion, accurate and efficient, meeting engineering, scientific research, and daily use needs.
Speed Conversion
Online speed unit converter, supporting quick conversion between common units such as meters/second, kilometers/hour, miles/hour, knots, feet/second, Mach, etc. Get precise results with one click to boost work efficiency.
Mass Conversion
Online mass unit conversion tool, supporting quick and accurate interconversion between milligrams, grams, kilograms, tons, tael, jin, dan, ounces, pounds, stone, hundredweight, short ton, long ton, carat, grain, and more, meeting various mass conversion needs with precision and efficiency.
Power Conversion
Online power unit conversion tool, supporting fast and accurate conversion between watts, kilowatts, megawatts, gigawatts, milliwatts, microwatts, horsepower, metric horsepower, BTU, calories, dBm, tons of refrigeration, foot-pounds per second, and more, meeting various power calculation needs with precision and efficiency.
Area Conversion
Online area unit conversion tool, supporting fast and accurate conversion between 16 units including square millimeters, square centimeters, square meters, square kilometers, hectares, ares, square chi, square zhang, mu, fen, li, square inches, square feet, square yards, acres, and square miles, meeting various area calculation needs with precision and efficiency.
Pace Conversion
One-click conversion between pace (min/km, min/mile) and speed (km/h, m/s, mph), quickly calculate marathon finish time, helping you precisely control your running rhythm.
Current Conversion
Quick conversion of current units, supporting precise interconversion between Ampere, Milliampere, Microampere, Kiloampere, Nanoampere, Picoampere, Electromagnetic Ampere, and Electrostatic Ampere, with one-click calculation.
Frequency Conversion
Online frequency unit conversion tool, supporting quick interconversion of hertz, kilohertz, megahertz, gigahertz, terahertz, RPM, rps, rad/s, °/s and other units, accurate and efficient, meeting various frequency conversion needs.
Volume Conversion
Volume Conversion: An online volume unit conversion tool that supports quick and accurate interconversion between milliliters, liters, cubic meters, cubic centimeters, fluid ounces, pints, quarts, gallons, cubic inches, cubic feet, cubic yards, cups, tablespoons, teaspoons, imperial gallons, barrels, and more, meeting various volume conversion needs with precision and efficiency.
Temperature Conversion
Temperature Conversion: Online temperature unit conversion, supporting quick and accurate interconversion between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur, precise and efficient, meeting various temperature measurement needs.
Voltage Conversion
Online voltage unit conversion tool, supporting fast and accurate conversion between V, kV, mV, μV, nV, MV, GV, statV, abV, W, A, J, C, meeting various voltage calculation needs with precision and efficiency.
Volume Flow Rate Conversion
Online volume flow unit conversion, supporting mutual conversion between m³/s, m³/h, m³/min, L/s, L/h, L/min, mL/s, mL/min, GPM, GPH, UK GPM, ft³/s, CFM, bbl/day and other units, fast and accurate, easy to operate.
Reactive Energy Conversion
Online reactive energy unit conversion tool, supporting quick mutual conversion between var·h, kvar·h, Mvar·h, var·s, and kvar·s, accurate and efficient, helping you easily handle energy unit conversions.
Illuminance Conversion
Online illuminance unit conversion tool, supports quick and accurate conversion between lx, lm/m², lm/cm², ph, fc, nx and other units, precise and efficient, meeting various light measurement needs.
Fuel Consumption Converter
Quickly convert fuel consumption units, supporting mutual conversion between L/100km, km/L, US MPG, UK MPG, mi/L, G/100mi, and more, accurate and efficient, helping you easily compare fuel consumption data.
