# Watts Amps Volts Calculator — Electrical power calculator > Electrical power calculator for single and three-phase AC circuits. (iPhone/iPad app by Pro Certs Software Ltd.) - Source: https://appshunter.io/ios/app/watts-amps-volts-calculator/id450813841 (this page in markdown: same URL + `.md`) - Developer: [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) - Category: Utilities, Productivity - Price: Free - Rating: 4.40/5 from 50 App Store ratings · 41 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 25 MB - Languages: American English - Released: 2011-08-19 - Data updated: 2026-08-24 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/watts-amps-volts-calculator/id450813841/reviews.md ## What is Watts Amps Volts Calculator? Easy to use electrical power calculator for converting and calculating to and from Watts, Amps, Volts, kW or Power Factor (PF) AC and DC. Watts Amps Volts Calculator is an advanced Ohm's Law Calculator with electrical calculators including AC 1-phase (single-phase), AC 3-phase (three-phase) and DC electrical circuit calculations. Supports AC Single Phase, AC Three-Phase, and DC electrical calculations in 16 different languages. Supports dark mode and light mode. AC Single Phase Calculations: - Calculate Watts. - Calculate Amps. - Calculate Volts. AC Three Phase Calculations: - Calculate kW. - Calculate Amps. - Calculate Volts. - Power Factor (PF). DC Calculations: - Calculate Watts. - Calculate Amps. - Calculate Volts. Electrical units are measured in the following: Current (I) Amps. Power (P) Watts (or kW). Voltage (V) Volts. Resistance (R) in Ohm's Simple, fast, and accurate — the electrical calculator you'll reach for every day. Pro Certs Software: Trusted by professionals since 2011. ## Key features - Single-phase power calculations - Three-phase power calculations - Convert Watts, Amps, Volts - Calculate kW and Power Factor - Input any two values to find the third ## Recent user reviews (10 of 41) All indexed reviews: https://appshunter.io/ios/app/watts-amps-volts-calculator/id450813841/reviews.md ### 4/5 — Useful *2026-06-19* Thank you ### 5/5 — Power Generation *2025-11-13* Awesome ### 5/5 — I like it *2025-08-21* It works well. 👍 ### 1/5 — Not ideal. *2023-10-29* Apps does the required calculations but only if you can get passed the adverts. Essentially you can’t always use it unless you willing to watch ads. Personally I just deleted the app because on this occasion it’s literally refusing to do the calculation without me running ads first. ### 5/5 — Solar Calculator *2022-08-13* This app has been very useful in setting up a solar array. I’m old school and could do the math myself to convert the current, but this app is faster and accurate leaving me the time to design panel racks and other mechanical issues. Could’ve used this years ago. Overall a very useful app for the novice and the pro! ### 1/5 — Endless ads *2022-03-22, version 3.5.3* This is junk! Ads ads ads! ### 1/5 — Adware *2022-02-09* Just a big ad ### 1/5 — Too many ads! *2021-07-08* I didn’t realize this app was going to be a non-stop series of adds! ### 5/5 — Handy and free *2021-04-29* Watts not to like... see what I did there? ### 1/5 — Pretty poor user experience *2021-03-13, version 3.4* How can the user field be pushed out of view every time you want to edit the field? ## Frequently asked questions about Watts Amps Volts Calculator ### What does the Watts Amps Volts Calculator app do? This app functions as an advanced electrical power calculator. It enables users to compute and convert values for Watts, Amps, and Volts in single-phase systems, and kW, Amps, Volts, and Power Factor in three-phase systems. It simplifies electrical calculations by allowing you to input known values to derive unknown ones. ### How do I use the single-phase calculator? For single-phase calculations, you can determine Watts, Amps, or Volts. Simply enter any two of these values into the app, and then press the 'calculate' button to find the missing third value. ### How do I use the three-phase calculator? The three-phase calculator allows you to compute kW, Amps, Volts, or Power Factor. To use it, enter any three of these four values, and then press 'calculate' to find the remaining unknown value. ### Is this app free to use? Yes, the app is free to download and use. It is supported by advertisements, which are displayed within the application. ### What electrical formulas does this app cover? The app covers essential electrical formulas for both single-phase and three-phase AC circuits. For single-phase, it handles Watts, Amps, and Volts. For three-phase, it includes calculations for kW, Amps, Volts, and Power Factor. ## Version history (last 5 releases) ### 3.10.1 — 2026-08-04 03/08/2026 v3.10.1 - App optimisations ### 3.9.8 — 2026-05-16 15/05/2026 v3.9.8 - Brand new UI - Supports 16 languages. ### 3.9.7 — 2025-07-26 27/07/2025 v3.9.7 - UI optimisations. ### 3.9.4 — 2022-06-20 Some optimizations to the news feed and layout improvements to the calculation screens. ### 3.5.3 — 2022-01-17 Added new languages. ## More apps by Pro Certs Software Ltd - [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) - [Fault Current Calculator (PFC)](https://appshunter.io/ios/app/fault-current-calculator-pfc/id577611194) All apps by Pro Certs Software Ltd: https://appshunter.io/developer/444429696 ## Related topics [watts amps volts calculator](https://appshunter.io/ios/topics/watts-amps-volts-calculator) · [basecalc electric calculator](https://appshunter.io/ios/topics/basecalc-electric-calculator) · [power calculator](https://appshunter.io/ios/topics/power-calculator) · [electrical power calculator](https://appshunter.io/ios/topics/electrical-power-calculator) · [watts home](https://appshunter.io/ios/topics/watts-home) · [ampero electrical calculator](https://appshunter.io/ios/topics/ampero-electrical-calculator) · [electric calculator](https://appshunter.io/ios/topics/electric-calculator) --- *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 2026-08-24.*