Free calculators that show the formula, your inputs, every step and the assumptions, with sources cited. Share any result with a link; no account, no cookies.
Voltage Drop and Wire Size Calculator
Voltage drop, smallest wire size for your target, and the longest run you can make, with every step shown.Conduit Fill Calculator
Mixed conductor sizes, the nipple rule, and "how many more fit", with every step shown.Ohm's Law and Power Calculator
Enter any two of V, I, R, P. Get the other two, with the work shown.
Voltage drop, smallest wire size for your target, and the longest run you can make, with every step shown.Conduit Fill Calculator
Mixed conductor sizes, the nipple rule, and "how many more fit", with every step shown.Ohm's Law and Power Calculator
Enter any two of V, I, R, P. Get the other two, with the work shown.