Identify resistor values quickly with our graphical color code calculator. Select the colors on your resistor to see its resistance, multiplier, tolerance, and temperature coefficient (for 6-band resistors).
Privacy Protected
Resistor Color Code Calculator
Decode resistor color bands to find resistance and tolerance values. Supports 4, 5, and 6 band resistors. Fast, free, and 100% private browser tool.
Share Tool
Select files or drag & drop here
Processed 100% locally in your browser. Your files never touch an external server.
Choose File to Begin
100% Client-Side Privacy•No File Size Limits•Free Forever
About Resistor Color Code Calculator
FusioFiles 100% Client-Side Privacy Guarantee
Your files and data never leave your browser — processed directly on your device.
Zero Server UploadsExecution occurs entirely in browser memory via WebAssembly and HTML5 Canvas.
HIPAA & GDPR ReadySafe for confidential tax forms, medical records, financial sheets, and legal contracts.
Zero Cloud LatencyInstant results with no upload delays, server queues, or third-party tracking.
Automatic RAM PurgeBuffers and caches are automatically wiped clean the instant you close the tab.
1
Select Bands
Pick the colors that match your physical resistor.
2
Set System
Choose between 4-band or 5-band color standards.
3
View Resistance
See the value in Ohms with precise tolerance feedback.
Key Features
Visual Interface
Click bands to match your resistor.
Multi-Band Support
4, 5, and 6 band modes.
Standard Colors
IEC standard color codes.
Frequently Asked Questions
Read the bands from left (closest to end) to right. The last band is usually tolerance.
Related Tools
View allPercentage Calculator
Calculate percentages, increases, and decreases.
Age Calculator
Find your exact age in years, months, and days. Includes birthday countdown and age breakdown.
BMI Calculator
Calculate your BMI using metric or imperial units. Includes health category results and range info.
GPA Calculator
Add courses, credits, and grades to calculate your weighted GPA. Supports 4.0 and 5.0 scales.
Scientific Calculator
Advanced math functions in your browser.
Loan Calculator
Calculate monthly EMI, total interest, and repayment schedules for loans and mortgages.
Last updated on