Electrical load calculator.
Estimate connected load, likely peak demand and current from appliance power and diversity.
Electrical load inputs
Starting surge, power factor and circuit diversity can require a larger supply. Trust level: engineering estimate; verify site and equipment assumptions before purchase or installation.
View detailed breakdown
| Assumption | Value |
|---|---|
| Single-phase voltage | 230 V |
Method: peak watts = appliance watts × quantity × concurrency
Inputs used: 100 W × 10 × 70% = 700 W
Assumptions: Single-phase voltage
Scope and warnings: Starting surge, power factor and circuit diversity can require a larger supply.
How this electrical load calculator works
Connected load is the sum of rated appliance power. Peak demand applies the share expected to run together. Current is then estimated at 230 V single phase. Starting current, power factor and circuit design remain separate engineering checks.
A worked example
Ten 100 W appliances create 1 kW of connected load. At 70% concurrency, estimated peak demand is 0.7 kW, or about 3.04 A at 230 V before surge and power-factor allowances.
Is peak load the same as connected load?
No. Connected load assumes every entered appliance is on. Peak load applies your concurrency assumption. Use 100% when simultaneous operation is credible, and have a qualified electrician size circuits and protection.
Calculations run on your device. Review your results before exporting or sharing them.
Separate continuous demand from equipment ratings
Enter nameplate or measured running watts for one appliance and multiply by the quantity. The concurrency control describes how many operate at the same time; it should reflect a real operating scenario rather than a desired smaller answer.
Review motors, compressors and pumps separately because start-up current can exceed their running demand. The displayed 230 V current is a simple resistive-equivalent screen, not a cable, breaker or generator specification.
Published by ToolMitra — methods and editorial approach.