SMD Resistor Code Calculator
Convert SMD resistor marking codes to resistance values. Supports 3-digit, 4-digit EIA, and R-notation formats.
How It Works
Convert SMD resistor marking codes to resistance values. Supports 3-digit, 4-digit EIA, and R-notation formats. Enter your values above and click Calculate to get instant results.
Formula
3-digit: AB×10^C | 4-digit: ABC×10^D | R-notation: left.right Ω
Quick Examples
- 103 → 10 × 10³ = 10,000Ω (10kΩ)
- 4R7 → 4.7Ω
- 2204 → 220 × 10⁴ = 2.2MΩ
Frequently Asked Questions
What does "R" mean in SMD codes?
The letter R represents the decimal point. 4R7 means 4.7Ω, R47 means 0.47Ω. This notation avoids decimal point confusion in manufacturing.
What is the EIA-96 code system?
EIA-96 is a 3-character code for 1% tolerance SMD resistors using a 2-digit code table plus a letter multiplier. This calculator handles standard numeric codes.