About Resistor Color Code Calculator
Decode 4-band resistor color codes into resistance value and tolerance.. Designed for accurate, instantaneous calculations with zero wait time.
Formula
Resistance = (Band 1 × 10 + Band 2) × 10^(Multiplier) ± Tolerance%
Example Calculation
Yellow (4), Violet (7), Orange (1k), Gold (5%) = 47,000 Ω (47 kΩ) ± 5%.
How to Use
- Enter your values into the form fields above.
- The calculation updates immediately in real time.
- Inspect the main summary and secondary breakdowns below.