Skip to main content
Calcimator

Electrical Load Calculator

Calculate total electrical load by circuit type and determine the service panel size and main breaker needed.

Inputs

W
W
W
W

Results

Total Connected Load

29,000 W

Total Amps (240V)120.8 A
NEC Demand Load17,600 W
Demand Amps (240V)73.3 A
Panel Size100 A
Main Breaker100 A
Total Circuits16

Total Connected Load

29,000 W

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Lighting Circuits — Number of dedicated lighting circuits. Accepts values from 0 to 20 (default: 4).
  3. Watts per Lighting Circuit — Average wattage per lighting circuit. Accepts values from 0 W to 2,000 W (default: 600 W).
  4. Outlet Circuits — Number of general-purpose outlet circuits. Accepts values from 0 to 30 (default: 8).
  5. Watts per Outlet Circuit — Average wattage per outlet circuit. Accepts values from 0 W to 2,400 W (default: 1,200 W).
  6. Appliance Circuits — Number of dedicated appliance circuits (oven, dryer, etc.). Accepts values from 0 to 10 (default: 3).
  7. Watts per Appliance Circuit — Average wattage per appliance circuit. Accepts values from 0 W to 12,000 W (default: 4,000 W).
  8. HVAC Circuits — Number of HVAC or heat pump circuits. Accepts values from 0 to 5 (default: 1).
  9. Watts per HVAC Circuit — Wattage per HVAC unit. Accepts values from 0 W to 15,000 W (default: 5,000 W).
  10. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  11. Total Connected Load — shown as a numeric value. This is the primary result of this calculator.
  12. Total Amps (240V) — shown as a numeric value.
  13. NEC Demand Load — shown as a numeric value.
  14. Demand Amps (240V) — shown as a numeric value.
  15. Panel Size — shown as a numeric value.
  16. Main Breaker — shown as a numeric value.
  17. Total Circuits — shown as a numeric value.
  18. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
Ad Placeholder

Related Calculators

Circuit Breaker Calculator

Calculate the required breaker amperage and wire gauge for your electrical load with NEC compliance checking.

Wire Gauge Calculator

Determine the recommended AWG wire gauge based on current, distance, voltage, and acceptable voltage drop.

Voltage Drop Calculator (Residential)

Calculate voltage drop for residential wiring and check compliance with the NEC 3% recommendation.

Amps / Watts / Volts Converter

Convert between amps, watts, and volts. Enter any two values to calculate the third, plus energy cost estimates.

Ad Placeholder