Conduit Fill: Wire Calculator

Estimate wire fill for EMT, PVC and IMC using published geometry. View the cross-section and reverse size. Planning only; verify the adopted electrical code.

Conduit Fill is a jobsite planning estimate for how much of a conduit’s internal area a pull will occupy.

Pick EMT, PVC Schedule 40, or IMC, a trade size from ½″ to 4″, one stranded copper wire size from 14 AWG to 4/0, THHN or THWN-2, and a count from 1 to 40. The app shows fill percent and an illustrative cross-section drawn on the phone.

Planning estimate from published wire/conduit geometry. Not a substitute for the electrical code or a licensed electrician.

WHAT IT USES Wire diameters come from Southwire SPEC 10025 and SPEC 10000. Conduit bores use Allied/Atkore EMT nominal dimensions, Wheatland IMC nominal dimensions, and CANTEX Schedule 40 minimum bore. Areas are calculated from those diameters. Fill is wire area × count ÷ conduit internal area. Sources and assumptions are available in Settings.

Only individual stranded copper wires of one size are supported. Count every wire, including neutral and grounding wires. Mixed sizes, bare grounds and cable assemblies need a separate calculation. This app does not check ampacity, derating, pulling tension, jamming, bends or special fill exceptions.

THE 40% FIGURE For three or more conductors the app marks a common 3+ conductor guideline — verify in the adopted code. One- and two-conductor planning figures are labeled the same way. Nothing in this app is a determination that a pull “meets code.”

FREE One fill check per session, three per day. Configure the pull, tap Check fill, and read the percent plus the cross-section.

LIFETIME — $4.99 Unlimited fill checks and reverse trade size with one payment. Reverse size shows the next trade size and the smallest fitting size at or above your selection. There is no code-edition selector or code approval claim.

REVERSE SIZE — $2.99 Optional one-time add-on for the next trade size and smallest fitting size at or above your selection. Included with Lifetime. Fill checks retain the free limits unless Lifetime is purchased.

PRIVATE No account. No tracking. No ads. Purchases go through Apple. Restore purchases any time from Settings.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://soxoa.com/conduitfill/privacy