How AmpFlow Calculates Results

Transparency about our formulas, data sources, and limitations.

📐 Formula

Total load (watts) = sum of all appliance wattages × demand factor. Required amperage = total watts ÷ voltage (typically 120V or 240V). Panel capacity should be at least 25% above calculated load per NEC guidelines.

📊 Data Sources

National Electrical Code (NEC) Article 220 load calculation standards; Department of Energy appliance energy usage data.

⚠️ Limitations

For estimation only. NEC requires licensed electrician calculations for permits. Motor startup surges, continuous load multipliers, and local code amendments may apply. Always consult a licensed electrician.

🕐 Last Reviewed

June 2026. Methodology is reviewed quarterly and updated when underlying data sources or industry standards change.

🚫 Disclaimer

This tool provides estimates for informational purposes only. Results are not financial, legal, or professional advice. Always consult qualified professionals and obtain multiple quotes before making decisions based on these estimates.