# Ohm Law Calculator — Amps Ohms Watts Volts Calc

> Ohm's Law calculator for electrical current, voltage, resistance, and power. (iPhone/iPad app by Nitrio.)

- Source: https://appshunter.io/ios/app/ohm-law-calculator/id505900137 (this page in markdown: same URL + `.md`)
- Developer: [Nitrio](https://appshunter.io/developer/321121189)
- Category: Utilities, Productivity
- Price: $2.99
- Rating: 3.50/5 from 4 App Store ratings · 7 written reviews indexed
- Age rating: 4+
- Requires: iOS 13 · 1 MB
- Languages: American English
- Released: 2012-03-05
- Data updated: 2026-08-15
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ohm-law-calculator/id505900137/reviews.md

## What is Ohm Law Calculator?

Ohm's Law calculators are available for calculating current, voltage, resistance, and power. You can input two of the four factors in Ohm's Law, which are Power (P) or (W), measured in Watts, Voltage (V) or (E), measured in Volts, Current or Amperage (I), measured in Amps (Amperes), and Resistance (R), measured in Ohms.

The required factor will be calculated automatically when you enter the necessary value.

The various formulas for Ohm's law are as follows:

P = power in watts
E = voltage in volts
I = current in amps
R = resistance in ohms

P = E2 / R
P = I2 * R
P = E * I

E = sqrt(P * R)
E = P / I
E = I * R

I = E / R
I = P / E
I = sqrt(P / R)

R = E / I
R = E2 / P
R = P / I2

Discover the power of precision with our Ohm's Law calculators. Whether you're an electrical enthusiast or a professional, our intuitive tools make calculations a breeze. Easily find current, voltage, resistance, or power by inputting just two known values. With real-time results, you can efficiently plan circuits, troubleshoot, or design electrical systems. Ohm's Law, a fundamental principle in electronics, is now at your fingertips. Empower your electrical projects with accurate calculations and make informed decisions. Simplify your work, save time, and harness the full potential of Ohm's Law with our calculators. Start optimizing your electrical endeavors today!

Experience the convenience of Ohm's Law calculators on your iPhone and iPad. Whether you're on the go with your iPhone or need a larger screen on your iPad, our app adapts to your device seamlessly. Unlock the power of accurate electrical calculations wherever you are. With a one-time purchase, you'll have this indispensable tool at your fingertips on all your iOS devices. Don't miss out on this versatile solution that enhances your electrical projects on both iPhone and iPad. Get it now and streamline your work with ease!

Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

## Key features

- Calculate current, voltage, resistance, and power
- Input any two known values
- Automatic calculation of missing factor
- Formulas for P, E, I, and R
- Intuitive and easy-to-use interface
- Real-time results

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/ohm-law-calculator/id505900137/reviews.md

### 4/5 — Good app

*2022-01-28*

Very helpful nice app. Would have it 5 states had it had a clear button to be able to enter new figured.

### 1/5 — Not Working

*2016-04-29, version 1.1*

App does not work

### 1/5 — Fraud

*2015-05-16*

This App does not even open...Shame on Apple for offering it...Do not purchase!!!

### 1/5 — Complete rip off

*2015-04-18*

Nothing but an empty black screen. I should have just thrown money on the street.

### 1/5 — Not working

*2014-10-16*

Bought this app but when I open it turns black wasted money on this

### 1/5 — Wasted $1.99

*2013-09-27*

What a disappointment !  Just bought this app, and it will not rotate screen view on my iPad.

### 1/5 — I=E/R

*2013-05-14*

I= 60v/100,000 = 0 
How it happen ? Still bugs in here

## Frequently asked questions about Ohm Law Calculator

### What electrical values can Ohm Law Calculator calculate?

Ohm Law Calculator can compute Power (P/W), Voltage (E/V), Current (I/A), and Resistance (R/Ω). You can input any two of these values to automatically find the remaining ones.

### How does Ohm Law Calculator work?

The app uses the fundamental formulas of Ohm's Law to perform calculations. Simply enter two known electrical values, and the app will instantly display the calculated result for the missing value.

### Is Ohm Law Calculator available on multiple devices?

Yes, Ohm Law Calculator is designed for iOS devices, including iPhone, iPad, and iPod. The one-time purchase grants access across all your supported iOS devices.

### What is the price of Ohm Law Calculator?

Ohm Law Calculator is available for a one-time purchase of $2.99. This provides full access to all its features without recurring costs.

### How often is Ohm Law Calculator updated?

The app was last updated on January 18, 2026, indicating a recent update. The developer, Nitrio, typically provides updates to ensure reliability and functionality.

### What is the age rating for Ohm Law Calculator?

Ohm Law Calculator has an age rating of 4+, making it suitable for a wide range of users, including younger individuals learning about basic electrical principles.

### Does Ohm Law Calculator have ads?

No, Ohm Law Calculator does not contain advertisements. As a paid application, it offers an ad-free experience for uninterrupted calculations.

### What do users think of Ohm Law Calculator?

Based on the available data, Ohm Law Calculator has a rating of 3.5 stars from 4 ratings. This suggests a generally positive but mixed user reception.

## Version history (last 5 releases)

### 1.9 — 2026-01-18

- Updated for the newest devices.
- Minor bugs fixed.

### 1.8 — 2023-09-13

- Updated for the newest devices.
- Minor bugs fixed.

### 1.7 — 2020-07-09

- Update for Newest Devices

### 1.6 — 2018-03-28

- Update for Newest Devices
- Minor UI Update

### 1.5 — 2016-10-05

update for newest devices.

## More apps by Nitrio

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- [Premium Clock](https://appshunter.io/ios/app/premium-clock/id517487778)

All apps by Nitrio: https://appshunter.io/developer/321121189

## Related topics

[ohms law calc](https://appshunter.io/ios/topics/ohms-law-calc) · [the ohms law calc](https://appshunter.io/ios/topics/the-ohms-law-calc)

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*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 2026-08-15.*