Electronics Unit Converter
Convert between electronics units instantly. Supports resistance, capacitance, inductance, frequency, voltage, current, power, and PCB length units.
Unit Converter
Enter a value and click Convert
How to Use This Converter
This electronics unit converter helps you quickly convert between common units used in circuit design, PCB layout, and electronic component specifications.
- Select Category — Choose the type of unit (resistance, capacitance, etc.)
- Enter Value — Type the number you want to convert
- Choose Units — Select the source and target units
- Click Convert — Get instant conversion with a full table of all units
- Use Swap Button — Quickly reverse the conversion direction
Supported Unit Categories
Resistance (Ω)
Convert between ohms, kilohms, megohms, milliohms, and microohms. Essential for specifying resistor values in circuit design.
Capacitance (F)
Convert between farads, millifarads, microfarads, nanofarads, and picofarads. Capacitor values span many orders of magnitude, making conversion essential.
Inductance (H)
Convert between henries, millihenries, microhenries, and nanohenries. Used for inductors, transformers, and RF design.
Frequency (Hz)
Convert between hertz, kilohertz, megahertz, and gigahertz. Critical for oscillators, clocks, and RF applications.
Voltage (V)
Convert between kilovolts, volts, millivolts, and microvolts. Covers everything from high-voltage power supplies to sensitive analog signals.
Current (A)
Convert between amperes, milliamperes, microamperes, and nanoamperes. Essential for power design and low-power sensor applications.
Power (W)
Convert between kilowatts, watts, milliwatts, and microwatts. Used for power budgets, thermal calculations, and component ratings.
Length - PCB (m, in, mil)
Convert between meters, centimeters, millimeters, micrometers, inches, and mils. Essential for PCB trace widths, component footprints, and mechanical design.
Quick Reference Tables
SI Prefixes
| Prefix | Symbol | Multiplier | Example |
|---|---|---|---|
| Giga | G | 10⁹ | 1 GHz = 1,000,000,000 Hz |
| Mega | M | 10⁶ | 1 MΩ = 1,000,000 Ω |
| Kilo | k | 10³ | 1 kΩ = 1,000 Ω |
| Milli | m | 10⁻³ | 1 mV = 0.001 V |
| Micro | µ | 10⁻⁶ | 1 µF = 0.000001 F |
| Nano | n | 10⁻⁹ | 1 nF = 0.000000001 F |
| Pico | p | 10⁻¹² | 1 pF = 0.000000000001 F |
Common PCB Length Conversions
| From | To | Multiply By |
|---|---|---|
| Inches | Millimeters | 25.4 |
| Mils | Millimeters | 0.0254 |
| Mils | Micrometers | 25.4 |
| Millimeters | Mils | 39.37 |
Frequently Asked Questions
What is a mil in PCB design?
A mil is one-thousandth of an inch (0.001 inch = 25.4 micrometers). It's commonly used in PCB design for trace widths, spacing, and drill sizes. Not to be confused with millimeters (mm).
Why do capacitors use such small units?
The farad is an extremely large unit. Most practical capacitors range from picofarads (pF) to millifarads (mF). A 1 farad capacitor is considered a "supercapacitor" and can store significant energy.
How do I read capacitor codes?
Ceramic capacitors often use 3-digit codes. The first two digits are significant figures, the third is the multiplier (number of zeros in pF). Example: 104 = 10 × 10⁴ pF = 100 nF = 0.1 µF.
What's the difference between mΩ and MΩ?
Case matters! mΩ (lowercase m) means milliohm (0.001 Ω), while MΩ (uppercase M) means megohm (1,000,000 Ω). This is a difference of 9 orders of magnitude!
When should I use metric vs imperial for PCB design?
Most modern EDA tools support both. Component pin pitch is often in metric (mm), while many PCB standards use mils. Use whatever your manufacturer and tooling prefer, but be consistent within a design.
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