Contact us
Found a wrong formula, a broken link, or want to suggest a calculator? Tell us directly.
How to get in touch
For corrections, feature requests, or partnerships, email hello@kwcalculator.com. We read every message ourselves.
Reporting a calculation error
If you think a result is wrong, include the exact inputs you used (current type, voltage, current or power, and power factor if relevant), the result the calculator gave you, and the result you expected. That lets us reproduce the issue and reply with the corrected formula or an explanation, instead of a back-and-forth.
Suggesting a new calculator
If there's a conversion or sizing calculation you keep doing by hand and wish existed here, tell us the exact inputs and outputs you'd want. Most of the calculators on this site started as exactly that kind of request.
We typically reply within 2 business days.