Skip to content
Open calculators

Demand Factor & Load Factor Calculator

Computes demand factor, load factor, and average-to-connected utilization from user-entered facility values. Flags inconsistent input relationships without inferring NEC demand allowances.

Inputs

Range: 0.001–1,000,000 kW

Use the installed or scheduled real load at the same boundary as the peak and average values. This is not an NEC demand allowance.

Range: 0–1,000,000 kW

Use the maximum measured or modeled real demand for the stated period and boundary. It should not exceed connected load without a documented reason.

Range: 0–1,000,000 kW

Use the time-average real demand over the same period used for peak demand. Keep the time basis consistent.

Result

Average / connected load
35.00%
Demand factor
70.00%
Load factor
50.00%
Inputs consistent
Demand factor
\frac{\mathrm{Peak\ demand\ (kW)}}{\mathrm{Connected\ load\ (kW)}} \cdot 100
\frac{70}{100} \cdot 100
Load factor
\begin{cases}0&\text{if }\mathrm{Peak\ demand\ (kW)} = 0\\\frac{\mathrm{Average\ demand\ over\ period\ (kW)}}{\mathrm{Peak\ demand\ (kW)}} \cdot 100&\text{otherwise}\end{cases}
\begin{cases}0&\text{if }70 = 0\\\frac{35}{70} \cdot 100&\text{otherwise}\end{cases}
Average / connected load
\frac{\mathrm{Average\ demand\ over\ period\ (kW)}}{\mathrm{Connected\ load\ (kW)}} \cdot 100
\frac{35}{100} \cdot 100

Related calculators

Screening tool. Verify the adopted NFPA 70 edition, AHJ requirements, nameplate data, and project conditions before use.