About Us

Welcome to Generator Size Calculator, your premier destination for all things related to generator sizing, power conversion, and electrical calculations.

Our Mission

Our mission is simple: to provide easy-to-use, accurate, and completely free tools that empower homeowners, contractors, and outdoor enthusiasts to make informed decisions about their power needs. We believe that understanding your power requirements shouldn't require an engineering degree.

What We Offer

We have developed a comprehensive suite of calculators designed to handle every step of your backup power planning:

• Sizing Calculators: From whole-house setups and RV generators to industrial 3-phase applications.
• Understanding Power: Tools to easily convert between Watts, Amps, kVA, and kW.
• Efficiency & Fuel: Estimate runtime, fuel consumption, and running costs for diesel, propane, gasoline, and natural gas generators.
• Safety & Wiring: crucial calculations for voltage drop, breaker sizes, and extension cords to ensure your setup is safe and compliant.

Why Trust Our Tools?

Our calculators are built upon standard electrical engineering formulas (like Ohm's Law and standard power factor equations) and practical guidelines used by industry professionals. However, please remember that these tools provide estimates to help you plan. Always consult a licensed electrician or qualified professional before making final purchasing decisions or installing electrical equipment.

Get In Touch

We are constantly improving our tools and adding new calculators based on user feedback. If you have an idea for a new feature, spot an issue, or just want to say hello, we'd love to hear from you. Visit our Contact page to reach out.