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OpenSpecEngineering

Open data for a field built on precision

Resistor Value → Color Code

Finds the nearest standard preferred value from the E12 (±10%) or E24 (±5%) series to your target resistance, and gives its 4-band color code, per IEC 60063 (Preferred number series for resistors and capacitors).

1st 2nd ×10^n tol. example: brown-black-red-gold = 1.0 kΩ ±5%
Real resistors only come in preferred-series values — your target gets rounded to the nearest one.

Solution

History