Welcome to the calculator page for electronics, robotics, and machining. I'm just getting started, so there are only two tools at the moment.

Color-coded resistor Resistor Color-Band Coding Chart and Calculator
Find the resistance values based on color codes, or find the color codes based on resistance. Shows ohms, kilohms, and megohms.
Ohm's law triangle Ohm's Law Calculator
Voltage, Current, Resistance, and Power Calculator Uses Ohm's law to calculate volts, amps, ohms, or watts from only two of the four values. Also converts between common metric prefixes (mega, kilo, milli, and micro).