About MicroCoulomb
MicroCoulomb is an independent website of electrical unit converters and calculators in American English. It covers charge, current, voltage, power, energy and resistance, shows the formula under every result, and cites the SI definitions it uses. The site is written by the MicroCoulomb editors.
What each section converts
| Section | What it converts | Source of the definition |
|---|---|---|
| Home converter | Charge, current, voltage, power, apparent power, energy, resistance | BIPM SI Brochure, 9th edition (2019); NIST SP 811 |
| Watts to amps | Power to current for DC, AC single-phase and three-phase | Standard electrical circuit relations |
| Amps to watts | Current to power for DC, AC single-phase and three-phase | Standard electrical circuit relations |
| kWh to watts | Energy over time to average power | BIPM SI Brochure (watt-hour = 3600 J) |
| Milliamps to amps | Milli-prefixed currents | BIPM SI prefixes |
Who writes it
The pages are written and checked by the MicroCoulomb editors, a team and not a named individual. We do not list personal credentials, because none are claimed. If you find a mistake, tell us in the comments on the page and we will correct it.
What the site does not do
Results are theoretical. MicroCoulomb does not give wiring advice, and breaker, wire and plug choices must follow the National Electrical Code and a licensed electrician. Product names and standards mentioned belong to their owners and the site has no affiliation with them.
Frequently asked questions
Is MicroCoulomb free?
Yes. The converters are free and need no sign-up.
Where do the constants come from?
From the BIPM SI Brochure (9th edition, 2019) and NIST Special Publication 811.
How do I report an error?
Leave a note in the comments on the page, giving the value and the result you expected.
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