justyourcalculatorResistor Color Code Calculator
Read resistor color bands, find the bands for a value, or combine resistors.
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Resistor Calculator
Resistor color codes both ways, series and parallel
Number of bands
Resistance
4.7 kΩ ±5%
4,700 ohms
- Minimum
- 4.465 kΩ
- Maximum
- 4.935 kΩ
- Tolerance
- ±5%
- Bands
- Yellow, Violet, Red, Gold
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How the resistor calculator works
On a 4 band resistor the first two bands are digits, the third is the multiplier (a power of ten) and the fourth is the tolerance. 5 and 6 band resistors use three digit bands for more precision; the sixth band gives the temperature coefficient in ppm/K.
Colors map to digits 0 to 9 in rainbow order: black, brown, red, orange, yellow, green, blue, violet, grey, white. Gold and silver as a multiplier mean × 0.1 and × 0.01; as a tolerance they mean ±5% and ±10%.
Resistors in series add: R = R1 + R2 + .... In parallel the reciprocals add: 1/R = 1/R1 + 1/R2 + ..., so the total is always smaller than the smallest resistor.
Using and checking your result
Published by JustYourCalculator. Check the units and assumptions above, and compare a known example before relying on the output. Calculations use browser arithmetic and may round displayed values.
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