WireCalc vs WireSize

The NEC wire sizing calculator that works where you work -- even with no signal. WireCalc gives electricians, contractors, and apprentices instant access to NEC 2023 wire sizing, voltage drop calculations, and conduit fill tables. No internet required. No subscription. Just accurate answers on the job site. STOP OVERSIZING WIRE. STOP GUESSING. Enter your load and run length. Get the correct wire gauge per NEC 310.16 in seconds. Check voltage drop. Verify conduit fill. Solve Ohm's law. All based on NEC 2023 (NFPA 70) tables. FEATURES: - Wire size calculator -- sizes by both ampacity AND voltage drop per NEC - Full NEC Table 310.16 ampacity reference (interactive, searchable) - Voltage drop calculator (single-phase and three-phase) - Conduit fill calculator with NEC Chapter 9 data (EMT, IMC, RMC, PVC) - Ohm's law calculator (V, A, Ohm, W -- enter any two, get all four) - Copper and aluminum conductor support - 60°C, 75°C, and 90°C temperature ratings - THHN, THWN, XHHW, TW, THW insulation types - Pass/fail indicators with NEC-compliant thresholds WHY ELECTRICIANS CHOOSE WIRECALC: - Works 100% offline -- designed for job sites with zero signal - No subscriptions, no ads, no account required - One-time purchase -- yours forever - NEC 2023 compliant tables and calculations - Large text and tap targets -- usable with work gloves Based on NEC 2023 (NFPA 70). Note: This app is a calculation tool and reference guide. It does not replace professional judgment or code compliance verification. Always verify calculations and consult local codes and amendments.

Tired of flipping through code books on the job? WireSize turns conductor and circuit questions into instant, accurate answers. Here's how it works: pick a calculator, enter your numbers, and read the result. Done. No accounts. No uploads. No tracking. Every calculation runs entirely on your iPhone. Whether you're sizing a feeder, checking a panel install, or studying for a license exam, WireSize is built to be the fastest way to get a number you can trust. Start with voltage drop in volts and percentage, for single-phase and three-phase circuits. Reverse it to find the minimum wire gauge for a target drop, or the longest run a gauge will allow. Check conductor ampacity with ambient-temperature and conductor-count derating, capped at the terminal rating. Size conduit fill for EMT, IMC, RMC, PVC and more — get a pass or fail instantly, or the smallest conduit that works. Calculate box fill volume for conductors, devices, clamps and grounds. Lay out conduit bends with offset, saddle and stub-up math. It goes further: circuit breaker and overcurrent sizing, equipment grounding conductor sizing, an Ohm's Law power wheel, single and three-phase power, kVA to amps, motor full-load current, transformer sizing, power-factor correction, AWG to mm2 conversion, resistor color codes and NEMA receptacle references. Every calculation is built on published electrical standards and verified against known reference values. Save any result, organize it by job site, and share it as a PDF for documentation or inspection prep. No ads. No data collection. No internet required. Just the calculations, fast. 3-day free trial, then $1.99/week. Cancel anytime. Terms of Use: https://taxlite.net/wire_size/terms.html Privacy Policy: https://taxlite.net/wire_size/privacy.html