--- title: "Ohms Law Calc. - Reviews, Revenue and Downloads in United States | Apple App Store" description: "Ohm's Law Calc. consists of 60 Electrical Calculators with Formulas and Circuits and 16 Electrical Converters. • Voltage Calculator • Current Calculator • Resistance Calculator • Power Cal" --- # Ohms Law Calc. — United States > Wire Size & Voltage Drop ![Ohms Law Calc. App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple221/v4/e3/80/b3/e380b31a-c962-5d16-5517-9989794ec28f/AppIcon-0-0-1x_U007epad-0-1-0-sRGB-85-220.png/434x0w.png) **Developer:** [V PUGAZHENTHI](https://apptail.io/developer/v-pugazhenthi-ufi) **Category:** Utilities **Rating:** 4.7/5 (1,286 ratings) **Price:** Free **Bundle ID:** com.pugazh.OhmsLawCalculator **Store:** Apple App Store **Country:** United States **Version:** 13.6 (released 2026-03-11) **Original Release:** 2012-01-06 **Languages:** Italian, Chinese, French, English, Dutch, Polish, Portuguese, Spanish, German **App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id491898006) **AppTail Page:** [https://apptail.io/app/ohms-law-calc-MUb/united-states](https://apptail.io/app/ohms-law-calc-MUb/united-states) ## Ohms Law Calc. Description Ohm's Law Calc. consists of 60 Electrical Calculators with Formulas and Circuits and 16 Electrical Converters. • Voltage Calculator • Current Calculator • Resistance Calculator • Power Calculator • Voltage Drop Calculator   • Wire Size Calculator • DC Generator Calculator • Transformer Calculations (Voltage & Current) New: Impedance Calculators Calculate impedance for combinations of resistors (R), inductors (L), and capacitors (C) in both series and parallel configurations: • R and L in Series / Parallel • R and C in Series / Parallel • L and C in Series / Parallel • R, L and C in Series / Parallel Power and Current Conversions • kVA to Amps (Single Phase & Three Phase) • Amps to kVA (Single Phase & Three Phase) • Single Phase & Three Phase Power Calculators • Horsepower Calculators (DC, Single Phase, Three Phase) Efficiency and Power Factor Tools • Efficiency Calculators (DC, Single Phase, Three Phase) • Power Factor Calculators (Single Phase & Three Phase) Energy Storage Calculators • Energy Cost Calculator • Energy Storage Calculators (Resistance, Inductance, Capacitance) Circuit Design Tools • Star-to-Delta and Delta-to-Star Conversions • Inductive & Capacitive Reactance Calculators • Resonant Frequency Calculator • Inductor and Capacitor Sizing Equations Component Calculations • Series and Parallel Calculators for Resistance, Inductance, and Capacitance • Unknown Resistance and Capacitance Calculators (Series & Parallel) More Calculations • Neutral Current (3-Phase Unbalanced Loads) • Characteristic Impedance (Parallel & Coaxial) • Transformer Calculator • Voltage Divider Calculator Illumination Calculators • Luminous Intensity Calculator • Luminous Flux Calculator • Solid Angle Calculator Electrical Converters • Field Strength Converter • Electrical Potential Converter • Resistance and Resistivity Converters • Conductance and Conductivity Converters • Capacitance and Inductance Converters • Charge Converters: Handles conversions for electrical charge, including: • Linear Charge Density • Surface Charge Density • Volume Charge Density • Linear Current Density • Surface Current Density • Power Converter App works with both iPhones, iPads and Mac Multiple Unit Compatibility: Supports a wide range of units for all electrical parameters, including Ohms, kiloOhms, Farads, Henrys, kVA, Volts, Weber, and more. ## Ohms Law Calc. Screenshots - [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/48/93/98/489398f4-6cd3-d6b3-1ef4-c4219604e6e6/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.16.00.png/2064x2752.png) - [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/77/0b/6a/770b6a58-f800-fa13-0fa8-643cfd0c328c/iPad_12.9_U0022_Display_-_Apple_iPad_Pro_12.9-inch__U00283rd_Generation_U0029_-_Screenshot3.png/2048x2732.png) - [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/e1/12/c9/e112c91d-3258-fb07-3898-0134f0ab9b3f/iPad_12.9_U0022_Display_-_Apple_iPad_Pro_12.9-inch__U00283rd_Generation_U0029_-_Screenshot1.png/2048x2732.png) - [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/66/89/33/66893334-9aa2-6d4c-8fd8-97af53303e93/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.20.08.png/2064x2752.png) - [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6c/49/51/6c495190-31f3-d208-92c9-95405fc94817/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.16.50.png/2064x2752.png) - [Screenshot 6](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/82/20/65/82206511-89bb-e8d8-3410-bf323548bd43/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.19.09.png/2064x2752.png) - [Screenshot 7](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/d0/59/43/d0594395-33a6-1457-3c9c-e925d75807fb/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.19.01.png/2064x2752.png) - [Screenshot 8](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/c2/c9/a2/c2c9a2bb-1b8c-681d-4a50-c12f5a88ed3d/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.18.33.png/2064x2752.png) - [Screenshot 9](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/74/52/fd/7452fdb5-bbeb-b9da-a0f0-73465e51eed7/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.18.00.png/2064x2752.png) - [Screenshot 10](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/7a/ce/6a/7ace6a44-a189-4276-b65f-4979afbcae66/Simulator_Screenshot_-_iPad_Pro_13-inch__U0028M4_U0029_-_2024-12-03_at_15.17.28.png/2064x2752.png) ## Ohms Law Calc. Rating Breakdown in United States - 5 stars: 1,045 (81%) - 4 stars: 148 (12%) - 3 stars: 45 (3%) - 2 stars: 13 (1%) - 1 stars: 35 (3%) ## Ohms Law Calc. Reviews in United States ### *---- "No easy to use" Just trying to calculator multiple resistors in parallel. Thought I used to be able to use this app. Could figure it out now. Went to web based calculator which was much easier. -- AAAAnuts, 2024-08-29 ### ***** "Best thing since sliced bread." Best this since sliced bread. -- MBFinch, 2023-08-14 ### *---- "App keeps trying to repeatedly charge me after I already paid for full version" Not sure if it’s a bug but there’s no point to paying the $3.99 fee if I’m getting prompted to pay for it each time I try to use it -- DBloc11231, 2020-08-21 ### *---- "Disappointed" This app is not worth the $4. I have been in the electrical trade for over 25 years and can do the math on my own but thought this would make quick work of calcs, but the more I play with it the more I get puzzled. I would not recommend buying this if you live in the US. -- elephant 677, 2020-06-11 ### *---- "Paid but not unlocked - no response" I downloaded this application to my Ipad because it looked very useful. I paid the $3.99 immediately Days later It is still locked and I can’t get any response from them via email. Because of their lack of response and the fact that it has ads and offers I don’t consider this a functional product that I can recommend. -- RPD1000, 2020-03-15 ### ***** "Free basic calculations for EV owners and a whole lot more!" This app is fine for basic current and power calculations an electric car driver may need to figure recharging times. They are free along with voltage and power calculations. But I needed more: voltage drop over a 50 foot Extention cord that the EV charger is connected to. For a few dollars more, that is available plus a whole host of other calculations. Then there is the conversion side, which I do not use. You get Field Strength, Electrical Potential and Resistance for free but must pay a dollar to unlock the rest. Whether EV driver or dabbling in electronics, this may be the app for which you have been looking. -- Jim Mol, 2018-07-05 ### **--- "Stupid pop ups" I just payed for all 49 calculators. From the first time I used it, this rate me window popped up EVERY TIME I tried to use it. How can I rate it if I haven’t used it? Otherwise I would have given a fair rating in a few days. -- Sparky952, 2018-06-13 ### *---- "Annoying" Rated 1 star because after paying it asks you to rate with every window change and every calculation. -- Barry1978, 2018-02-19 ### *---- "Worst Ohms calculator ever seen" dont waste your time downloading it. -- wilramos, 2017-04-06 ### ***** "Neat little tool" If you work with relays or any electrical circuits this is a real time saver. Sure all of us know ohm's law, but it seems like we usually need to take the time to figure what gets divided by what to get the result. This does all the work in seconds and can do a wide variety of different calculations. -- Mary and gary, 2015-08-27 ### ****- "Nice app for electrical engineers" I found almost all the major electrical conversions here. Easy to use and simple UI -- Lawrence man, 2014-06-05 ### *---- "Needs more" I need to put in voltage and resistance to gets amps and watts. Please fix! -- Formby7469, 2014-04-18 ### **--- "Simple calculator" Any EE student would be able to perform these task easily with a calculator. Not worth it the download, it does however do what it "says" which is a simple Ohms Law calculator. -- solidXmike, 2014-01-30 ### ***-- "Electrical Engineer" The apps looks great ! Just one thing, the Ohms Law & Formulas looks to be incorrect. I think they some how got mixed up between (E and P ) the formula for Voltage should not be "V = E/I". The use of V and E should not be expressed in the formula. Stick to just using "E" to represent voltage. -- Engineer in LA, 2013-01-16 ### *---- "Not that great" Very useful for college but it constantly closes its self during use. Its free and that in its self shows what you get -- MrRemi, 2012-09-06 ### ***-- "It works but..." Yes it does the calculations but the problem with it on my iPhone 3s is the input keyboard overlays the results which makes it difficult to see. I can't find any way to turn off the keyboard so you can clearly see the calculations. If you look close at the screen shots above you will see it is overlaying the formulas, clear button and what looks to be a function button. It's free but not sure it's real useful. -- PA From KC, 2012-01-18 ### ***** "Best" This is a terrific app!! -- vais007, 2012-01-13 ### ***** "Very helpful" This is just the kind of app I was looking for.. Very useful and easy to use. And its free too.. -- KM in LA, 2012-01-07 [View all Ohms Law Calc. reviews and detailed analytics on AppTail](https://apptail.io/account/signup?utm_campaign=ai-crawl&utm_content=reviews) ## Ohms Law Calc. In-App Purchases | Item | Price | |------|-------| | Ohms Law Calc. | $3.99 | ## Ohms Law Calc. 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