Resistor Code Calculator Pro
Resistor Scanner Color & SMD
Free · Designed for iPad. Not verified for macOS.
Decode color bands, convert SMD markings, browse E-Series values, and solve resistor circuit calculations in one focused toolbox.
Resistor Calculator is a practical offline toolbox for electronics students, makers, repair technicians, and engineers who work with resistors and common circuit calculations.
Decode resistor color bands, convert resistance values into color bands, read SMD resistor markings, browse E-Series values, and solve everyday resistor-related circuit problems in one focused app.
RESISTOR TOOLS
• Decode 3, 4, 5, and 6-band resistors
• Convert resistance values into color bands
• Support engineering notation such as 4.7k, 4k7, 2M2, and 0R22
• Calculate tolerance, minimum, and maximum resistance
• Show temperature coefficient for 6-band resistors
• Reverse resistor reading direction
• Copy, share, save, and reset results
SMD RESISTOR CODES
• Decode 3-digit and 4-digit SMD codes
• Support R, K, and M notation
• Support EIA-96 markings
• Handle zero-ohm resistors
• Convert resistance values back into suitable SMD codes
• Explain decoded values clearly
E-SERIES VALUES
• Browse E6, E12, E24, E48, E96, and E192 values
• Find the nearest standard resistor values
• Compare error and tolerance ranges
• Open selected values directly in resistor tools
CIRCUIT CALCULATORS
• Series and parallel resistance
• Ohm’s Law
• Voltage divider
• LED current-limiting resistor
• Target resistance combinations
• Wheatstone bridge
• Op-amp gain
• Star / Delta conversion
• Wire resistance
• Voltage drop
• Pull-up / Pull-down resistor
• RC time constant
LIBRARY WORKFLOW
• Save calculation history
• Add results to Favorites
• Organize values and calculations into Projects
• Export project data as CSV, JSON, or plain text
• Review saved calculations later
BUILT FOR DAILY ELECTRONICS WORK
Resistor Calculator is designed to be fast, clear, and focused. Results update immediately as you enter values, and formulas are available when you need to understand how a calculation was made.
All core calculations run on your device and the app works without an account or internet connection.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Ha Do Thi Thu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Ha Do Thi Thu
- Size
- 13.1 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 11 more
- English, French, German, Hindi, Indonesian, Italian, Japanese, Portuguese, Russian, Spanish, Turkish, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © Ha Do