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Four-Band Resistor Color Code Calculator — result sheet
Decode the nominal resistance and tolerance range of a standard four-band resistor.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: R = (10d₁+d₂)×10ᵐ; lower = R(1−t), upper = R(1+t).
The first two bands form the significant two-digit value, the third selects a multiplier, and the fourth sets the nominal tolerance range.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- First digit band — 10 choices
- Second digit band — 10 choices
- Multiplier band — 12 choices
- Tolerance band — 9 choices
Worked example
| Input | Value |
|---|---|
| First digit band | yellow |
| Second digit band | violet |
| Multiplier band | orange |
| Tolerance band | gold |
Yellow–violet–orange–gold decodes to 47,000 Ω ±5%, from 44,650 Ω to 49,350 Ω.
Assumptions and limits
- The input is a standard four-band fixed resistor read from the significant-digit side toward the separated tolerance band.
- The color mapping follows the common digit, multiplier, and tolerance convention; temperature coefficient, aging, measurement error, and preferred-value series are not modeled.
- The decoded value is nominal and does not certify a component or circuit.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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