# Fault Current Calculator (PFC) — PFC Fault Current Calculator > Electrical prospective fault current (PFC) calculator for single and three-phase circuits. (iPhone/iPad app by Pro Certs Software Ltd.) - Source: https://appshunter.io/ios/app/fault-current-calculator-pfc/id577611194 (this page in markdown: same URL + `.md`) - Developer: [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) - Category: Utilities, Productivity - Price: Free (on sale, was $0.99) - Rating: 1.00/5 from 2 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 10 MB - Languages: American English - Released: 2012-11-15 - Data updated: 2026-08-14 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/fault-current-calculator-pfc/id577611194/reviews.md ## What is Fault Current Calculator (PFC)? Fault Current Calculator for iPhone and iPad is a fast, free tool for electricians, contractors, and engineers. Calculate Prospective Fault Current (PFC), Prospective Short-Circuit Current (PSCC), and Prospective Earth Fault Current (PEFC). Enter any two known values - voltage, loop impedance (Zs/Ze), or fault current - and the app instantly calculates the third. KEY FEATURES: PSCC and PEFC calculations: Calculate prospective short-circuit current for L-N or L-L faults and prospective earth fault current for L-E faults. Single-phase and three-phase support: Perform fault-current calculations for both system types. Automatic calculations: Enter any two known values to auto calculate the third. Loop-impedance calculator: Calculate Zs or Ze from voltage and prospective fault current. Formula display: See the formula used for each calculation so you can understand and verify the result. Works offline: Use the app in roof spaces, basements, plant rooms, and other locations without a signal. Dark mode and light mode: Maintain a clear display in different site conditions. 16 languages: Fully translated for electricians worldwide (af, ar, de, es, en, fr, hi, id, it, ja, ko, nl, pl, pt, ru, zh). Fast and free: A clean interface designed to deliver results without unnecessary steps. DEFINITIONS: AIC (Ampere Interrupting Capacity), often written as kAIC for kilo-Amperes, is a specific rating for protective devices that open a circuit, such as circuit breakers and fuses. SCCR (Short-Circuit Current Rating) is the maximum fault current that a complete piece of equipment or electrical assembly (like an industrial control panel, switchboard, or HVAC unit) can safely withstand without causing a hazard. Electrical calculations should be independently verified before safety-critical work. Ensure the calculated prospective fault current does not exceed the protective device's rated breaking capacity. For additional tools, upgrade to Electrical Tools & Reference, which includes calculators for kVA, Max Zs, cable sizing, and more. Pro Certs Software - trusted by electricians since 2011. ## Key features - Calculate PFC from Zs/Ze and Voltage - Calculate Zs/Ze from Voltage and PFC - Calculate Voltage from PFC and Zs/Ze - PFC calculation in kA and Amps - Single and three-phase support - Input any two values to calculate the third ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/fault-current-calculator-pfc/id577611194/reviews.md ### 1/5 — Paid but still subject to ads! *2023-01-07* Paid for the app but still subject to ads and won’t work in landscape mode on iPad. ### 5/5 — Works Great *2019-11-21* These certs I’m filling in have a pfc column for every circuit. Great little timesaver App. The boxes need to be a bit bigger tho imho ### 1/5 — Fault current calculator *2013-03-08* This is a rip off... Don't buy this....................... ## Frequently asked questions about Fault Current Calculator (PFC) ### What is Fault Current Calculator used for? Fault Current Calculator is used to determine the prospective fault current (PFC) in kA and Amps for single and three-phase electrical circuits. This helps in selecting the correct circuit breaker ratings. ### How does Fault Current Calculator work? You can enter any two values from voltage, Zs/Ze earth loop impedance, or PFC to calculate the third. This flexibility allows for various calculation scenarios. ### What electrical values can Fault Current Calculator compute? It can compute Prospective Fault Current (PFC) in kA and Amps, Voltage, and Zs/Ze earth loop impedance. It supports both single-phase and three-phase calculations. ### Is Fault Current Calculator available on multiple devices? Yes, Fault Current Calculator is supported on iPhone and iPad devices. ### What is the price of Fault Current Calculator? Fault Current Calculator is a paid app, priced at $0.99. ### Does Fault Current Calculator have ads? Yes, Fault Current Calculator contains advertisements. ### How often is Fault Current Calculator updated? The latest version, 1.4.5, was last updated on July 28, 2025. Updates ensure the app remains current with features and compatibility. ### What is the user rating for Fault Current Calculator? Fault Current Calculator has a rating of 1.0 stars based on 2 ratings. This indicates a low user satisfaction based on the available data. ## Version history (last 5 releases) ### 1.4.8 — 2026-08-12 11/08/2026 v1.4.8 - New user interface (UI) - Added dark mode - Added 16 languages (af, ar, de, es, en, fr, hi, id, it, ja, ko, nl, pl, pt, ru, zh) - Performance optimisations - Added help guides ### 1.4.5 — 2025-07-28 26/07/2025 v1.4.5 - Some UI updates. - Some optimisations. - Smaller app size (faster to download). ### 1.4.1 — 2022-01-24 News feed update. ### 1.4 — 2021-11-21 Added calculate to PFC three phase kA & Amps, improved layout and optimizations. ### 1.3 — 2020-04-27 April 2020: New User Interface (UI). ## More apps by Pro Certs Software Ltd - [Watts Amps Volts Calculator](https://appshunter.io/ios/app/watts-amps-volts-calculator/id450813841) - [kVA Calculator](https://appshunter.io/ios/app/kva-calculator/id467407057) - [Max Zs Values](https://appshunter.io/ios/app/max-zs-values/id498838137) - [Electrical Tools and Reference](https://appshunter.io/ios/app/electrical-tools-and-reference/id564264558) - [R1+R2 Zs Ze Calculator](https://appshunter.io/ios/app/r1-plus-r2-zs-ze-calculator/id572416784) All apps by Pro Certs Software Ltd: https://appshunter.io/developer/444429696 ## Related topics [eaton fault current calculator](https://appshunter.io/ios/topics/eaton-fault-current-calculator) · [fault current finder](https://appshunter.io/ios/topics/fault-current-finder) · [available fault current calculator](https://appshunter.io/ios/topics/available-fault-current-calculator) · [fault current calculator](https://appshunter.io/ios/topics/fault-current-calculator) · [the current by subsplash](https://appshunter.io/ios/topics/the-current-by-subsplash) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-14.*