Total Power Formula:
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Definition: This calculator estimates the total power consumption of your home by summing the wattage of individual appliances.
Purpose: It helps homeowners and electricians determine the total electrical load for proper circuit sizing and energy management.
The calculator uses the formula:
Where:
Explanation: Simply add up the wattage of all appliances that might be running simultaneously to get your total power demand.
Details: Proper power estimation ensures your electrical system can handle the load, prevents circuit overloads, and helps with energy efficiency planning.
Tips: Enter the wattage for up to 4 appliances (find wattage on appliance labels or manuals). Leave blank for appliances not in use.
Q1: Where can I find an appliance's wattage?
A: Check the label on the appliance, owner's manual, or manufacturer's website. Some appliances list amps instead - multiply amps by voltage (usually 120V) to get watts.
Q2: Should I include all appliances in my home?
A: Include only those that might run simultaneously. For example, you might not need to add a space heater if you only use it when AC is off.
Q3: What's a typical wattage for common appliances?
A: Refrigerator (150-400W), Microwave (600-1200W), LED TV (30-100W), Laptop (50-100W), Incandescent bulb (40-100W).
Q4: How does this relate to my electrical panel capacity?
A: Most homes have 100-200 amp service at 240V (24,000-48,000W total). Your calculated total should be well below this.
Q5: Should I consider startup surges?
A: Some appliances (like refrigerators) have higher startup wattage. Consider adding 20-30% if calculating for circuit breakers.