About the kVA to Amps Calculator

Why this site exists

Converting kVA to amps is a three-second calculation — division, with a √3 for three-phase. It should not need a website. But when I checked the pages that rank for it, I found one of the top results dividing by a power factor of 0.8 inside the kVA-to-amps formula, which overstates the current by 25%. That formula belongs to a different conversion (kW to amps), and the error is invisible unless you already know the math — exactly the people who don't need the calculator.

So this site does one job, carefully: the plain conversion and its reverse, a dedicated three-phase tool with both voltage conventions, generator and transformer full-load amps (the two places this conversion is used most), and a complete printable chart. Every page shows its formulas, works examples in the open, and states its limits. The methodology page even carries the short proof of why power factor cancels out of this conversion entirely.

How the tools are built and checked

Each calculator runs entirely in your browser — nothing you type is sent anywhere. The chart is not typed by hand; it is generated by the same calculation code the tools use, so the table and the calculators cannot drift apart. Before any update ships, the calculation code is run against fixed reference cases (100 kVA at 400 V three-phase must return 144.34 A, and so on) and the results are checked against the National Electrical Code's full-load current approach and the standard identities in IEEE and IEC publications.

The site is deliberately narrow. It does not size cables, select breakers or design installations — it gives the correct current figure and points to the code checks that follow from it. Final electrical work belongs with a licensed electrician.

About Ian Welkins

I'm Ian Welkins, based in Houston, Texas. I build small, focused calculator sites — the kind of tool I go looking for myself when a job needs one number, right, without a sign-up wall or a page of clutter around it. This site grew out of checking generator and transformer figures for exactly that kind of job, and finding the top-ranked answer mathematically wrong.

My rule for these sites: show the formula, show a worked example, cite the standard the numbers rest on, and make the correction path obvious. If you find an error here, I want to hear about it — the Report an Error page is the fastest route, and confirmed fixes are credited there.

A note on AI

I use AI tools as a drafting and coding assistant when building these sites. Every formula, figure and chart on this site is checked by hand against the official sources cited on the methodology page before it is published — the AI can type, but the arithmetic and the responsibility are mine. If something reads like it was never checked by a person, tell me and I will fix it.

Corrections and contact

Errors in a conversion tool are not cosmetic — someone may size equipment from them. If a result, a chart value or an explanation here looks wrong, please report it.