generator sizing — free browser tool | fatcousin

aggregate loads → kva size · headroom · power factor · 1ɸ · 3ɸ · runs locally

disclaimer · read before using results

continuous-load arithmetic only. uses one global power factor for every load · ignores motor inrush (often 3–7× running current for several seconds at start), hmi ballast strike current, harmonic distortion, voltage regulation under transient load, altitude/temperature derating of the generator itself, and per-phase imbalance · 3ɸ output assumes a perfectly balanced load across all three legs · this tool does not select a generator, cabling, distribution, or protection — confirm with manufacturer data and a qualified electrician before powering any rig.

loads

namewatts (W)countsubtotal

1800 W

2000 W

1200 W

supply

phase

supply voltage line-to-neutral (V)

assumptions

power factor (0.01 – 1.0)headroom (%)

power factor: 1.0 for purely resistive loads · ~0.85 typical mixed · ~0.7 for motor-heavy loads. headroom: extra capacity beyond the continuous load.

result

total real power

5.000 kW

5000 W

apparent power

5.882 kVA

real / power factor

size (with headroom)

7.353 kVA

apparent × (1 + headroom)

continuous current

49.02 A

I = P / (V · PF)

status

>ready