Examples
Examples
Try the starting example
- Four bands, comma-separated
- brown,black,red,gold
- Resistance and tolerance
- 1000 Ω ±5%
Try another scenario
- Four bands, comma-separated
- red,violet,orange,gold
- Resistance and tolerance
- 27000 Ω ±5%
Calculation method
Calculation method
Resistance and tolerance
decodeResistor(a)
Symbols and units
- a
- Four bands, comma-separated
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
The first two colour bands give decimal digits; the third is a power-of-ten multiplier (gold 10^−1, silver 10^−2). Resistance = (10 × first digit + second digit) × multiplier. The fourth band supplies tolerance: brown 1%, red 2%, green 0.5%, blue 0.25%, violet 0.1%, grey 0.05%, gold 5%, silver 10%. Digit colours in order 0–9 are black, brown, red, orange, yellow, green, blue, violet, grey, white.
Assumptions & limits
Assumptions & limits
- Supports a four-band resistance code: two digits, multiplier and tolerance. Read from the digit end.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.