Engineering Calculators

A suite of powerful, easy-to-use calculators to help you quickly solve complex electronics and robotics equations.

Determine the resistance value based on color bands for 4, 5, or 6-band resistors with high precision.

Quickly calculate Voltage, Current, Resistance, or Power by simply entering two known values.

Find the exact output voltage of a resistive divider circuit given the input voltage and resistor values.

Estimate how long your battery will last for a specific project based on capacity and total current draw.

Convert your robot's motor RPM and wheel diameter directly into linear speed (m/s or km/h).