1. What is a Generator Watts Calculator?

Definition: This calculator estimates the total wattage needed for a generator based on the running watts and starting watts of your equipment.

Purpose: It helps homeowners and professionals determine the appropriate generator size for their power needs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Total Watts — The generator capacity needed (watts)
• Running Watts — Continuous power required by all devices (watts)
• Starting Watts — Extra power needed for motor startup (watts)

Explanation: The running watts represent the continuous load, while starting watts account for the surge power needed when motors start.

3. Importance of Proper Wattage Calculation

Details: Accurate wattage calculation ensures your generator can handle all connected equipment without overload while being properly sized for efficiency.

4. Using the Calculator

Tips:

• List all devices you plan to power simultaneously
• Find running watts (continuous power) for each device
• Identify starting watts (especially for motors and compressors)
• Enter the sum of running watts and the highest starting watts

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between running and starting watts?
A: Running watts are continuous power needs, while starting watts are temporary surges (3-5 seconds) when motors start.

Q2: How do I find my appliance wattage?
A: Check nameplates, manuals, or use a wattage meter. Some appliances list amps - multiply by voltage (120V) to get watts.

Q3: Should I add all starting watts together?
A: No, only add the highest starting wattage from any single device, as motors typically don't all start simultaneously.

Q4: What safety margin should I add?
A: It's recommended to add 10-20% to the calculated total for safety and future expansion.

Q5: How does this relate to generator size?
A: Choose a generator with a rated wattage equal to or greater than your calculated total watts.