Or try an example search: Resistor Color Code Calculator
This calculator helps you determine the values of the resistors R1 and R2 to be used for a bridged-tee attenuator.
This balanced attenuator calculator helps you determine the resistor (R1) values for a balanced attenuator.
This tool is designed to calculate the inductance of two parallel wires
This calculator will determine the correct antenna downtilt angle given the heights of the antennas and distance between them.
This calculates values of the inductance, capacitance of an inductor and capacitor used in a Butterworth LC bandpass filter.