Hardware
Hardware tools for resistor color codes, capacitor EIA markings, LED current-limiting resistors, and other electronics work in your browser.
Capacitor Code Calculator
Decode ceramic EIA codes like 104 to nF and µF, or type 100nF to get the marking, tolerance, and range.
LED Resistor Calculator
Find the current-limiting resistor for an LED: ohm value, nearest E12/E24 part, wattage, and color bands.
Resistor Color Code Calculator
Read 4-, 5-, and 6-band resistor color codes, or type a value like 4.7 kΩ to see the bands, tolerance, and range.