Free Electrical Panel Load Calculator
Sum all branch circuit loads to verify your electrical panel has sufficient capacity for the total demand.
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Total Amperage
86.7 A
Total Connected Load20,800 W
Minimum Panel Size100 A
Total Amperage vs General Lighting & Receptacles
Panel Load Calculation
Add all branch circuit loads in watts. Divide by the panel voltage to get total amperage. Compare against the panel main breaker rating. Standard residential panels are 100A, 150A, or 200A at 240V.
Total Amps = Total Watts / Voltage
Example Calculation
Typical home: 4800W lighting, 3000W kitchen, 1500W laundry, 5000W HVAC, 4500W water heater, 2000W other.
- 01Total = 4800 + 3000 + 1500 + 5000 + 4500 + 2000 = 20,800W
- 02Amps = 20,800 / 240 = 86.7A
- 03Minimum panel = 100A (round up to next standard)
Frequently Asked Questions
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