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1800 Watts to Amps Calculator

Q: What wire gauge do I need for 1800W at 120V?

12 AWG copper wire on a 20A circuit breaker is required by electrical code.

Heavy power tools, induction burners, commercial blenders. Explains maximum rating of standard 15A 120V residential circuit and why continuous loads must not exceed 1440W (80%).

⚡ 1800 Watts to Amps Calculator

Voltage (V)

Volts

Power Factor (default 1.0)

Calculated Result

Instant Calculation

Engineering Output

Auxiliary Output

Step-by-Step Derivation ▼ Show Steps

Governing Formula Verified Physics

I = 1800 Watts / (Voltage × Power Factor) = 15.0 Amps @ 120V

Calculations adhere to standard electrical engineering physics and National Electrical Code (NFPA 70) regulations.

Engineering Principles & Calculations

This calculator uses the exact mathematical relationships between Voltage, PF to determine Current (15A at 120V, 7.5A at 240V), NEC 80% Rule Safety Flag. In practical installations, factors such as ambient raceway temperature, harmonic distortion, duty cycle continuous operation, and conductor impedance must be accounted for by a certified electrician.

Explains maximum rating of standard 15A 120V residential circuit and why continuous loads must not exceed 1440W (80%).

Typical Application & Industry Guidelines

Heavy power tools, induction burners, commercial blenders.

Reference Matrix