Resistor Color Code Calculator

• Resistor color code calculator supporting 4-band, 5-band and 6-band resistor value reading and identification
• Quickly calculate resistance, tolerance and temperature coefficient by selecting band colors

1. Open the tool page — no installation needed
2. Select the band count (4 / 5 / 6 bands), then set a color for each band using the dropdown or by clicking the band on the diagram
3. The resistance, tolerance and temperature coefficient are calculated in real time as you set colors — click "Copy Value" to copy the result

• This tool is completely free and requires no sign-up
• Everything runs locally in your browser — your data never leaves your device

Free online resistor color code calculator supporting 4-band, 5-band and 6-band resistor value reading and identification. Quickly calculate resistance, tolerance and temperature coefficient by selecting band colors.

Open the tool page — no installation needed Select the band count (4 / 5 / 6 bands), then set a color for each band using the dropdown or by clicking the band on the diagram The resistance, tolerance and temperature coefficient are calculated in real time as you set colors — click "Copy Value" to copy the result

This tool is completely free and requires no sign-up Everything runs locally in your browser — your data never leaves your device

Yes, Resistor Color Code Calculator is completely free. No download or installation required — it runs right in your browser.