Decode or encode four-, five- and six-band resistor colors and calculate ideal series or parallel resistance with labeled electrical diagrams.
01 / PURPOSE-SPECIFIC INPUTS
Uses common band-code conventions and role-specific legal colors. Manufacturer datasheets govern nonstandard codes; no component power rating is inferred.
02 / RESULT & INTERACTIVE INSPECTION
For ambiguous markings, nonstandard precision codes or temperature ratings, check the manufacturer datasheet. This is an ideal resistance/code tool; use the existing Ohm’s Law Calculator for voltage/current/power.
Significant digit 1: yellow · 4.
| Band | Color | Role | Value |
|---|---|---|---|
| 1 | yellow | Significant digit 1 | 4 |
| 2 | violet | Significant digit 2 | 7 |
| 3 | red | Multiplier | × 100 Ω |
| 4 | gold | Tolerance | ±5% |
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Review the explanation, copy supported outputs or reset the workspace.
Four-band codes use two significant digits, multiplier and tolerance. Five-band codes use three significant digits. Six-band mode adds the common temperature-coefficient band in ppm/K rather than a military reliability code.
Decode or encode four-, five- and six-band resistor colors and calculate ideal series or parallel resistance with labeled electrical diagrams. Inspect the calculated data through labeled controls and review worked assumptions before using a result.
Resistor Calculator calculations run locally in browser memory. Entered financial values, wages, measurements and other inputs are not sent to a third-party processing service or saved as a personal profile. Ordinary website page requests may still be logged. Clipboard access happens only when you choose Copy Result.
Four-band codes use two significant digits, multiplier and tolerance. Five-band codes use three significant digits. Six-band mode adds the common temperature-coefficient band in ppm/K rather than a military reliability code.
No. Gold and silver can represent multipliers or tolerances, not significant digits. A nonzero ordinary band-coded resistor cannot start with black; role-specific choices reject invalid combinations.
This common-code table uses grey ±0.05%, matching the inspected Omni table. Published precision-color tables differ; the calculator does not infer uncommon orange/yellow tolerances or replace the component manufacturer datasheet.
For nominal resistance R and tolerance t percent, the interval is R × (1 − t/100) through R × (1 + t/100). It is a tolerance interval, not a probability or normal-distribution claim.
Series resistance is the sum. Parallel resistance is one divided by the sum of reciprocals. An ideal zero-ohm parallel branch shorts the equivalent to zero; network tolerances and power ratings are not inferred.
No nearest preferred-value rounding is applied. The value must fit the supported two- or three-significant-digit code and gold/silver-to-white multipliers. Three-band, conductor-resistivity and nonstandard reliability modes are outside this tool.