Sizing Calculator is a focused collection of online calculators for industrial electrical load, sizing, measurement, and preliminary design checks.
The site is intended for electrical engineers, facility engineers, electrical designers, industrial electricians, maintenance teams, controls engineers, generator and UPS planners, and other people who need a quick calculation or a transparent arithmetic check.
What the tools cover
- Industrial facility load schedules, connected and diversified load, demand and load factors.
- Motor operating current, branch-circuit arithmetic, feeder targets, starting current, and VFD current comparisons.
- Generator and UPS capacity screens, battery runtime energy estimates, and industrial DC power-supply checks.
- Power factor, P-Q-S relationships, capacitor-bank estimates, transformer kVA, transformer loading, and fault-current screening.
- Conductor ampacity adjustments, voltage drop, parallel conductors, conduit and cable-tray area checks, EGC comparisons, phase measurements, and resistive-loss cost estimates.
How to use the results
Each calculator explains its required inputs, units, formula, output, and limitations. Some tools are arithmetic helpers that require a verified code-table value, manufacturer factor, measured value, or project assumption. A result is therefore a starting point for review, not a universal equipment rating or a statement of compliance.
Sizing Calculator does not publish a company history, engineering credential, or professional certification claim on this page. The site exists to make the calculation step easier to inspect and repeat.