What This Site Is For
NodeAndVolt is designed for students, technicians, electricians, engineers, makers, and anyone who needs a quick way to check common electrical formulas. Each tool shows the formula, defines its inputs, and provides a worked example so the result can be understood instead of treated as a black box.
The calculators run entirely in your browser. Values entered into a calculator are not submitted to NodeAndVolt or stored by the calculator code.
How Calculators Are Built
Transparent formulas
Every calculator displays the equation and a substituted calculation so you can independently verify the result.
Defined assumptions
Pages identify important assumptions such as balanced loads, ideal components, unloaded dividers, and estimated efficiency.
Input validation
Tools reject missing, negative, or out-of-range values instead of silently returning a misleading answer.
For the full calculation review approach, see the calculation methodology.
Who Reviews Content
NodeAndVolt currently publishes general educational calculators and guides. Pages are reviewed against their displayed formulas, worked examples, and automated regression checks. The site does not claim a licensed professional review unless a specific reviewer is named on the page.
Important Limitations
A formula result is not the same as a complete design. Real installations may require code tables, conductor temperature corrections, continuous-load factors, available fault current, equipment listings, environmental derating, manufacturer instructions, and local authority approval.
Never use this website as the sole basis for life-safety work, conductor or overcurrent-device sizing, equipment selection, or regulatory compliance.
Corrections and Feedback
Clear corrections make technical tools better. If you find an unclear label, questionable assumption, broken page, or calculation that does not match the displayed formula, please use the contact page.
See the editorial and calculator review policy and calculation methodology for the testing and correction process.