Power Calculators

Power Calculators

Power Calculator

What Size Generator?

Voltage (VAC):


Power Factor:

Conversion Information

Please select conversion types from the dropdown menus, enter a value and hit the ‘calculate’ button


Amps to KVA



Enter the motor sizes in the order that they will be started and select “Staggered start = Yes” below. Multiple motors started at the same time may be summed and treated as one motor. If the motors are all started together select “Staggered start = No”.
Starting Seq. Motor Size (KW) Starter Type Est. size req. (KVA)


Generator Power Calculator – East Coast Generators

Understanding Your Power Needs Made Simple

Welcome to East Coast Generators' Power Calculator page – your ultimate tool for demystifying the complexities of generator power requirements. Whether you're planning an event, running a construction site, or ensuring backup power for your business or home, our power calculator is designed to guide you in selecting the perfect generator.

Key Features of Our Power Calculator:

  • Comprehensive Coverage: From small appliances to large industrial machines, calculate the required power for a wide range of equipment.
  • User-Friendly Interface: Easy-to-use format, ensuring you get accurate results without the hassle.
  • Educational Insights: Learn about the technicalities of power consumption in simple terms.

Calculating Your Power Needs: A Step-by-Step Guide

  1. Understanding Units:
    • HP (Horsepower): A unit measuring the power of motors.
    • kW (Kilo Watts): A standard unit of power measuring energy output.
    • kVA (Kilo Volt Amps): A unit measuring apparent power, used in generator capacities.
    • Ampere (I): Unit measuring electric current.
    • Volts (V): Unit measuring electrical potential.
    • Power Factor (PF): A dimensionless number between 0 and 1, crucial in calculating the actual power consumption.
  2. Calculators Available:
    • Amperes when kVA is known
    • Converting kVA to kW and vice versa
    • Converting kW to HP
    • kVA Required to run motors
  3. Generator Size Estimation:
    • For Starting and Running Motors: Calculate the size of the generator needed to start and run motors with different start methods (DOL - Direct On Line or Star Delta).
    • For Various Appliances: Estimate the generator size for a variety of home and industrial appliances.

Practical Applications

  • Event Planning: Calculate power for lighting, sound systems, catering equipment, etc.
  • Industrial Use: Determine the generator size for heavy machinery, construction tools, etc.

Home Backup: Estimate power needs for essential home appliances during outages.