# Ohms Law — Ohms Law Calculator > Ohm's Law calculator for voltage, current, resistance, and power. (iPhone/iPad app by Pro Certs Software Ltd.) - Source: https://appshunter.io/ios/app/ohms-law/id590727537 (this page in markdown: same URL + `.md`) - Developer: [Pro Certs Software Ltd](https://appshunter.io/developer/444429696) - Category: Utilities, Productivity - Price: Free - Rating: 4.30/5 from 7 App Store ratings · 10 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 12 MB - Languages: American English - Released: 2013-01-08 - Data updated: 2026-08-24 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/ohms-law/id590727537/reviews.md ## What is Ohms Law? Ohms Law calculator for calculating power, current, resistance and voltage. Ohms Law Calculator Features: - Calculate Voltage (volts) - Calculate Current (amps) - Calculate Resistance (ohms) - Calculate Power (watts) Input any two values to calculate the other two. Ohms Law Formula: V = Voltage I = Current R = Resistance P = Power V / IxR (or P) An advanced Ohms Law calculator to calculate Voltage, Current, Resistance & Power. How to use: 1) Enter any two values to calculate the other two. 2) Tap calculate. A Voltage Calculator, Current, Resistance, Power calculator all in one app. Check out our collection of electrical apps for iPhone and iPad https://www.procertssoftware.com/apps/ ## Key features - Calculate Voltage - Calculate Current - Calculate Resistance - Calculate Power - Input two values to find others ## Recent user reviews (10 of 10) All indexed reviews: https://appshunter.io/ios/app/ohms-law/id590727537/reviews.md ### 1/5 — Disappointed *2024-10-11* Calculates ok if can finish putting in details before the adds interrupts. ### 2/5 — It works, it’s free, but it is more of an advertising app than an electrical app. *2024-05-12* I don’t recommend this. ### 1/5 — To many adverts or pop ups *2022-03-15* Far to many pop ups ### 5/5 — Awesome *2021-11-06* Great app to have for car audio ### 5/5 — Pretty good *2021-01-06* Overall it’s a pretty good app to do the math ### 4/5 — App *2020-12-08* Simple and convenient to use. It’s awesome! ### 5/5 — Perfect *2020-05-06* I love it ### 5/5 — Good *2020-01-14* Does what it says. Xxx ### 4/5 — Ohms Law *2019-10-03* Nice little app which works well. Would welcome it showing the formulae permutation used for each calculation though. ### 5/5 — Rf *2019-05-14* Handy little app ## Frequently asked questions about Ohms Law ### How do I use Ohms Law? To use Ohms Law, input any two known values (voltage, current, resistance, or power) into the app. Then, tap the calculate button to find the remaining two values. ### What electrical values can Ohms Law calculate? Ohms Law can calculate Voltage (in volts), Current (in amps), Resistance (in ohms), and Power (in watts). ### Does Ohms Law have ads? Yes, Ohms Law contains advertisements to support its development and maintenance. ### What devices is Ohms Law available on? Ohms Law is available for iPhone, iPad, and iPod devices. ### Is Ohms Law suitable for all ages? Ohms Law has an age rating of 4+, making it suitable for a wide range of users. ### How often is Ohms Law updated? The latest version of Ohms Law is 1.3.9, and it was last updated on July 28, 2025. Updates ensure the app remains functional and may introduce improvements. ### What is the user rating for Ohms Law? Ohms Law has a rating of 4.3 stars based on 7 ratings, indicating generally positive user feedback. ### Can Ohms Law calculate all four values at once? No, Ohms Law requires you to input at least two values to calculate the other two. It does not automatically calculate all four without input. ## Version history (last 5 releases) ### 1.3.9 — 2025-07-28 26/07/2025 v1.3.9 - Some UI updates. - Some optimisations. - Smaller app size (faster to download). ### 1.3.4 — 2022-01-23 News feed update. ### 1.3.3 — 2021-11-18 Improved layout, removed rate app overlay and added input delete buttons. ### 1.3.1 — 2020-04-30 Version May 2020: New UI, improvements & bug fixes. ### 1.3 — 2019-03-22 Thank you for downloading Ohms Law calculator. This update brings new UI improvements and bug fixes. ## Apps similar to Ohms Law | App | Rating | Price | Category | | --- | --- | --- | --- | | [Resistor Color Band Calculator](https://appshunter.io/ios/app/resistor-color-band-calculator/id1658435931) | 4.6 (22) | Free | Utilities | | [Airplus](https://appshunter.io/ios/app/airplus/id6444922947) | 2.8 (12) | Free | Utilities | | [Calculator +](https://appshunter.io/ios/app/calculator-plus/id351815470) | 4.6 (9,997) | Free | Utilities | | [Ohm's Law Calculator](https://appshunter.io/ios/app/ohms-law-calculator/id1518919778) | 5.0 (2) | Free | Utilities | | [Power Calculator](https://appshunter.io/ios/app/power-calculator/id454548791) | 4.5 (2) | Free | Utilities | | [Elitech Tools](https://appshunter.io/ios/app/elitech-tools/id1552808829) | 2.7 (28) | Free | Utilities | ## 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) - [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 [ohms law](https://appshunter.io/ios/topics/ohms-law) · [ohms](https://appshunter.io/ios/topics/ohms) · [ohms law calc](https://appshunter.io/ios/topics/ohms-law-calc) --- *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.*