Resistor Color Bands (Value → Bands)
Given a value and tolerance, get the four- or five-band colour sequence with a drawn resistor — the fastest way to pick a part by eye.
Key points
Resistor Color Bands (Value → Bands): Given a value and tolerance, get the four- or five-band colour sequence with a drawn resistor — the fastest way to pick a part by eye. Formula: 4-band: digit · digit · multiplier · tolerance ｜ 5-band: digit · digit · digit · multiplier · tolerance. Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Read from the end away from the tolerance band (gold/silver); gold and silver can also be multipliers (×0.1 / ×0.01). Five-band resistors are typically 1% with three significant digits; four-band parts are usually 5% or 10%.
Inputs
4-band: digit · digit · multiplier · tolerance ｜ 5-band: digit · digit · digit · multiplier · toleranceCalculation model (updates with parameters)
| Band sequence | Yellow (4) → Violet (7) → Red (2) → Gold ±5% | |
| Value represented | 4.7 kΩ | target 4.7 kΩ，偏差 0.000% |
| Digits and multiplier | 4 7 2 | black brown red orange yellow green blue violet grey white = 0–9 |
| Tolerance | Gold ±5% |
Engineering notes
- Read from the end away from the tolerance band (gold/silver); gold and silver can also be multipliers (×0.1 / ×0.01).
- Five-band resistors are typically 1% with three significant digits; four-band parts are usually 5% or 10%.
FAQ
- What is Resistor Color Bands (Value → Bands) for?
- Given a value and tolerance, get the four- or five-band colour sequence with a drawn resistor — the fastest way to pick a part by eye.
- What is the formula for Resistor Color Bands (Value → Bands)?
- Core formula: 4-band: digit · digit · multiplier · tolerance ｜ 5-band: digit · digit · digit · multiplier · tolerance. The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using Resistor Color Bands (Value → Bands)?
- Read from the end away from the tolerance band (gold/silver); gold and silver can also be multipliers (×0.1 / ×0.01). Five-band resistors are typically 1% with three significant digits; four-band parts are usually 5% or 10%.