Wire Gauge
Calculate Ohm's law (V=IR), voltage dividers, LED current-limiting resistors, RC/RLC resonant frequency, RC filter cutoff, and PCB trace width for wire gauge.
Input Circuit Parameters
Enter supply voltage, resistance, inductance, or capacitance.
Calculated Current (I) / Output Voltage
Ohm's Law Foundation
Current flowing through a conductor between two points is directly proportional to voltage across the points: I = V / R (1 Ampere = 1 Volt / 1 Ohm).
Calculation Methodology & Details
Formula
Applies Kirchhoff's current/voltage laws (KCL/KVL), IPC-2221 PCB trace current capacity, and 555 timer astable multivibrator duty cycle formulas.
Important Disclaimer
Calculations assume nominal component values without component tolerance derating (±5% resistor bands) or temperature coefficient drifts.
How to Calculate Step-by-Step
Follow these steps to complete the calculation:
Step 1
Enter input voltage V_in or LED forward voltage V_f (e.g. 2.0V for Red, 3.2V for Blue/White).
Step 2
Input component values R (Ohms Ω), C (Microfarads μF), or L (Millihenries mH).
Step 3
View current output in mA, LED current-limiting resistor wattage rating, 3dB cutoff frequency (Hz), or PCB trace width in mils/mm.
Detailed Insights & Expert Guide
ℹ️ About this Calculation
The Wire Gauge solves electronic circuit Ohm's law, voltage/current dividers, LED series resistors, 555 timer pulse frequencies, op-amp gain, and PCB copper trace current sizing.
Variable Glossary
Voltage (V)
Electrical potential difference between two circuit points measured in Volts.
Resistance (R)
Opposition to electric current flow measured in Ohms Ω (P = I²R = V²/R).