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TechnologyGenerated accuracy model review: 2026-05-06

Resistor Color Code accuracy and testing

This page documents how Calwarden builds trust for this calculator: source notes, regression-style default tests, limitations, assumptions, unit handling, rounding, and visible change history.

Formula source

  • * **4-Band:** Digit 1 | Digit 2 | Multiplier | Tolerance * **5-Band:** Digit 1 | Digit 2 | Digit 3 | Multiplier | Tolerance Example: Red-Red-Brown (4-band) = 2, 2, x10 = 220 Ω.

Test cases

Default input regression check

Generated from the checked-in default inputs and calculate function.

Inputs

  • Number of Bands: 4 Band
  • Band 1: Brown (1)
  • Band 2: Black (0)
  • Band 3 (5-band only): Black (0)
  • Multiplier: Red (x100)
  • Tolerance: Gold (5%)

Expected outputs

  • Resistance: 1.00 kΩ
  • Range: 950 Ω - 1.05 kΩ

Known limitations

  • This page documents the checked-in calculator logic and does not certify results for every real-world edge case.
  • Use the result as a planning estimate unless the calculator page states a stricter purpose.

Assumptions

  • Band colors are interpreted using the standard resistor color-code system.
  • Four-band resistors use two significant digits, while five-band resistors use three.
  • The displayed resistance is formatted into ohms, kilo-ohms, or mega-ohms for readability.

Unit handling

  • Number of Bands accepts one of the configured options.
  • Band 1 accepts one of the configured options.
  • Band 2 accepts one of the configured options.
  • Band 3 (5-band only) accepts one of the configured options.
  • Multiplier accepts one of the configured options.
  • Tolerance accepts one of the configured options.

Rounding rules

  • Number displays use up to 2 decimal places in the calculator UI.

Version history

1.0.0 - 2026-05-06

Generated accuracy and testing page from the current resistor-calculator calculator definition.

Change log

2026-05-06

Published default regression test documentation and metadata fallbacks for Resistor Color Code.

Calculator transparency

Accuracy pages are generated from checked-in calculator definitions and can be upgraded with curated review metadata over time.

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