Electric tools.
Calculators for Ohm's law, power, voltage drop, and electrical engineering.
Ohm's Law Calculator
Calculate Voltage, Current, or Resistance using Ohm's Law.
Power Calculator
Calculate electrical Power, Voltage, or Current.
Voltage Drop Calculator
Calculate the voltage drop of an electrical circuit based on wire length and current.
Electrical Engineering Calculators
Electrical calculations are fundamental to designing, building, and troubleshooting circuits and electrical systems. From determining the correct wire gauge for a home renovation project to calculating power dissipation in electronic components, reliable electrical math prevents costly errors and safety hazards.
Essential Electrical Calculators
Our electrical engineering tools apply Ohm's Law (V = IR), the power equation (P = VI), and related formulas to help you solve circuit problems quickly and accurately. Each calculator shows the underlying formula and the complete calculation steps.
- Ohm's Law Calculator: Calculate voltage (V), current (I), or resistance (R) when any two values are known. Supports all three forms of the equation.
- Power Calculator: Determine electrical power in watts using voltage and current, voltage and resistance, or current and resistance.
- Voltage Drop Calculator: Estimate the voltage drop across a conductor based on wire gauge, length, material, and current — critical for ensuring electrical installations meet safety codes.
These calculators are valuable for electricians, electronics hobbyists, engineering students, and anyone working with electrical systems. All calculations use standard electrical engineering formulas and industry-accepted material properties.