Easily calculate electrical power, amperage, or voltage. This tool simplifies electrical calculations for users needing to find one value when the other two are known.
Watts - A power converter by Eclectic DNA, LLC

250+ iOS apps curated and reviewed
Finding the right wattage calculator apps can be overwhelming with so many options. We've analyzed 250+ apps to bring you the best choices for 2026, from free options to premium solutions with advanced features.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 5.0★ (1) | No | No | Aug 2026 | |
| 2 | $0.99 was $1.99 | — | No | No | May 2026 | |
| 3 | Free | 4.7★ (1.3K) | Yes | Yes | Aug 2026 | |
| 4 | $1.99 | 4.7★ (3) | No | No | Aug 2026 | |
| 5 | Free | 4.6★ (1.5K) | No | No | Aug 2026 | |
| 6 | Free | — | No | No | May 2026 | |
| 7 | Free | — | No | No | May 2026 | |
| 8 | Free | — | No | No | May 2026 |

Easily calculate electrical power, amperage, or voltage. This tool simplifies electrical calculations for users needing to find one value when the other two are known.












This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.


Easily calculate wattage using three different formulas. Input values and get instant results, with options to copy or email your calculations. Features an intuitive design for a smooth and reliable user experience.


Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.








This app provides precise mathematical and scientific calculations for various needs. It helps users calculate generator and UPS requirements, convert lumens to watts, and estimate generator fuel consumption. It's designed for students, professionals, and anyone needing accurate computations.








This app provides a straightforward calculator designed for the electrical industry, offering tools for power and lighting calculations. It helps users determine generator and UPS requirements, convert units, and calculate fuel consumption. Suitable for both professionals and casual users needing electrical calculations.




Calculate household electricity usage and costs for various appliances. Track consumption by hour, day, month, or year to identify high-usage devices and save on electricity bills.




This app provides quick conversions for various gas measurements, including natural gas and LPG, as well as water volumes and flow rates. It also handles metric to imperial measurements and electrical unit conversions.





