SMD Resistor Code Calculator

SMD Resistor Code Calculator allows you to determine resistance by the SMD (surface mount device) resistor markings found on the device and to determine SMD resistor markings by resistance. It displays rated resistance and resistor tolerance.

This tool supports 3-digit code, 4-digit code and EIA-96 code.

The 3-digit code is used on ±5% tolerance SMD resistors. The first two numbers indicate the significant digits, and the third is the multiplier. "R" is used to indicate the position of a decimal point. Note: there is no multiplier if "R" is used.

The 4-digit code is used on ±1% tolerance SMD resistors. The first three numbers indicate the significant digits while the last digit is the multiplier. "R" is used to indicate the position of a decimal point. Note: there is no multiplier if "R" is used.

The EIA-96 code is used on ±1% tolerance SMD resistors. It uses three characters (two digits and a letter) in which the digits represent the value (for example, 12 = 12th value of the possible range) and the letter represents the multiplier.

Why You Need an SMD Resistor Code Calculator

For Students

• Helps memorize SMD code notation through practice.
• Saves time in lab work and electronic projects.
• Works smoothly on desktop, tablet, or smartphone.

For Professionals

• Speeds up diagnostics, assembly, and rework.
• Prevents costly mistakes when identifying resistor values.
• Essential for modern electronics, where color bands are no longer used.

For DIY Hobbyists

• Allows you to decode SMD markings without specialized knowledge.
• Simplifies finding replacements for burned or unknown parts.
• A perfect tool for learning basic electronics at home.

To determine values of other SMD components use our SMD Capacitor Code Calculator and SMD Inductor Code Calculator.