Resistor Calculator
Calculate resistor values from color bands or determine the color bands from a given resistance value and tolerance.
Was this calculator helpful?
How to use this tool?
- 1 Enter the requested data in the fields above carefully.
- 2 Click the calculate button to process the information instantly.
- 3 Analyze the detailed result and the formula explanation presented below.
- 4 You can print, share, or even embed the calculator on your own site for free.
Unlike traditional static calculators, our tools adapt to specific user needs. They include detailed explanations of the formulas used, ensuring transparency in results. Furthermore, our design is focused on user experience, eliminating distractions and focusing on what really matters: your data and conclusions.
Previous Results
| Result | Inputs | Date |
|---|
Frequently Asked Questions
The first two bands represent the first two digits of the resistance value, the third band is the multiplier, and the fourth band indicates tolerance. For example, red (2), red (2), orange (×1000) gives 22,000 Ω or 22 kΩ with a typical gold tolerance of ±5%.
Tolerance indicates how much the actual resistance can vary from the stated value. Common tolerances are ±5% (gold), ±10% (silver), and ±1% (brown). Lower tolerance means higher precision.
Currently, this calculator supports 4-band resistors. For 5-band resistors, the first three bands are significant digits, the fourth is multiplier, and fifth is tolerance. A future update may add this feature.