Advanced Resistor Calculator - Color Code, Series, Parallel, LED & More

🔌 Advanced Resistor Calculator Suite

🎨 Resistor Color Code Calculator

Decode resistor values from color bands (3-6 bands supported)

Number of Bands: 3 Bands 4 Bands (Standard) 5 Bands (Precision) 6 Bands (High Precision)

💡 Quick Guide

• 4-band: 2 digits + multiplier + tolerance

• 5-band: 3 digits + multiplier + tolerance

• 6-band: 3 digits + multiplier + tolerance + temperature coefficient

⚡ Series & Parallel Calculator

Calculate total resistance for series or parallel configurations

Enter Resistor Values (comma-separated):

Enter Resistor Values (comma-separated):

📊 Common Values Reference

Configuration	Values	Result
2×100Ω Parallel	100Ω, 100Ω	50Ω
2×1KΩ Series	1KΩ, 1KΩ	2KΩ

💡 LED Resistor Calculator

Calculate the current-limiting resistor for LED circuits

Source Voltage (V):

LED Forward Voltage (V): Custom Red LED (~1.8V) Orange LED (~2.1V) Yellow LED (~2.2V) Green LED (~3.0V) Blue LED (~3.3V) White LED (~3.3V)

LED Forward Current (mA):

Number of LEDs in Series:

⚠️ Safety Note

Always use the next higher standard resistor value to ensure LED safety.

Common LED current: 10-20mA for standard LEDs

📐 Ohm's Law Calculator

Calculate voltage, current, resistance, or power

Voltage (V):

Current (A):

Resistance (Ω):

Power (W):

📚 Formulas

• V = I × R

• P = V × I

• P = I² × R

• P = V² / R

📊 Voltage Divider Calculator

Calculate output voltage in a voltage divider circuit

Input Voltage (Vin):

R1 (Top Resistor) Ω:

R2 (Bottom Resistor) Ω:

Load Resistance (Optional) Ω:

💡 Formula

Vout = Vin × (R2 / (R1 + R2))

Note: Load resistance affects the output voltage

🔍 E-Series Standard Value Finder

Find the nearest standard resistor value

Target Resistance Value:

E-Series: