PCB & Electronics Calculators Below is our collection of online electronic engineering calculators. Students, hobbyists, engineers and businesses alike use our calculators for engineering, circuit board projects, and more. Battery Life Capacitance-Frequency-Inductance Capacitor Energy and Time Constant L-C Resonance Ohm's Law Calculator Parallel Resistor PCB Trace Width Resistor Color Code Resistance-Frequency-Capacitance Standard Resistor Value Voltage-Current-Resistance-Power Voltage Drop Wheatstone Bridge Calculator Calculate Current in Amperes from Kilo Volt Amperes (KVA) Calculate Horsepower from Kilo Watts (KW) Calculate Kilo Volt Amperes (KVA) from Horsepower Calculate Kilo Volt Amperes (KVA) from Kilo Watts (KW) Calculate Kilo Watts (KW) from Kilo Volt Amperes Design PCB's for FREE Order PCB's from Gerber Files