# LED Resistor Calculator Plus — Resistor Values for LED > Calculates series resistor values for powering LEDs safely. (iPhone/iPad app by Nitrio.) - Source: https://appshunter.io/ios/app/led-resistor-calculator-plus/id1369457811 (this page in markdown: same URL + `.md`) - Developer: [Nitrio](https://appshunter.io/developer/321121189) - Category: Utilities, Productivity - Price: $2.99 - Rating: 4.80/5 from 8 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 13 · 1 MB - Languages: American English - Released: 2018-04-09 - Data updated: 2026-08-06 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/led-resistor-calculator-plus/id1369457811/reviews.md ## What is LED Resistor Calculator Plus? LED resistance calculator use to determine the series resistor needed to connect various series combinations of light emitting diodes or "LEDs". LED resistance calculator will assist you pick the resistors make the connections for any number of LEDs. Every (LED) light emitting diode has a current that they can handle safely. Going beyond it maximum current will damage the LED. So limiting the current through the LED with the use of a series resistor is a common practice. LED resistance calculator will help you determine the value of the resistor so you can add in series with the LED to limit the current. Just input the indicated values and the result will be calculate automatically. The result include Resistor Value, Resistor Power Dissipation and Recommended Resistor Wattage. Formula: R = (Vs - Vf * Nled) / If Where: Vs - Supply Voltage Vf - LED voltage drop. The voltage drop on a LED depends on the color it emits. If- LED current. The usual operating range of common 3 mm and 5 mm LEDs is 10-30 milliamps. Nled - Number of LEDs in series A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable current is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor. LEDs are typically small (less than 1 mm2) and integrated optical components may be used to shape the radiation pattern. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light. Infrared LEDs are still frequently used as transmitting elements in remote-control circuits, such as those in remote controls for a wide variety of consumer electronics. The first visible-light LEDs were of low intensity and limited to red. Modern LEDs are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness. * This method is not recommended for high current LEDs, which need a more reliable switching current regulator. Thanks for your support and do visit nitrio.com for more apps for your iOS devices. ## Key features - Calculate series resistor value - Determine resistor power dissipation - Recommend resistor wattage - Supports multiple LEDs in series - Input supply voltage, LED voltage, and current ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/led-resistor-calculator-plus/id1369457811/reviews.md ### 3/5 — Needs a major update/Crashes *2026-05-01* This application use to work seamlessly. Went to the paid version and it crashes several times before you can actually obtain the data that you are looking for. Please advise. ## Frequently asked questions about LED Resistor Calculator Plus ### What is the price of LED Resistor Calculator Plus? LED Resistor Calculator Plus is a paid app priced at $2.99. This one-time purchase grants you access to all its features without any recurring fees. ### How often is LED Resistor Calculator Plus updated? The app was last updated on January 8, 2026, indicating ongoing support and potential for future improvements. Users can expect reliability and timely fixes. ### What devices is LED Resistor Calculator Plus compatible with? LED Resistor Calculator Plus is available for iPhone, iPad, and iPod devices. Its design is optimized for these Apple platforms. ### What is the age rating for LED Resistor Calculator Plus? The app has an age rating of 4+, making it suitable for a wide range of users, including younger individuals interested in electronics. ### Does LED Resistor Calculator Plus have ads? No, LED Resistor Calculator Plus does not contain advertisements. As a paid application, it offers an ad-free experience. ### What do users like about LED Resistor Calculator Plus? Based on its rating of 5.0 stars from 6 ratings, users likely appreciate its straightforward functionality and accuracy in calculating necessary resistor values for LED projects. ### Can LED Resistor Calculator Plus calculate for complex LED configurations? The app is designed to assist with various series combinations of light-emitting diodes. You can input the number of LEDs in series to determine the appropriate resistor. ### What information does LED Resistor Calculator Plus provide? Beyond the resistor value, the app also calculates the resistor's power dissipation and recommends a suitable wattage for safe operation. ## Version history (last 3 releases) ### 1.2 — 2026-01-08 - Updated for the newest devices. - Minor bugs fixed. ### 1.1 — 2020-12-12 - Update for Newest Devices - Bug Fixed ### 1.0 — 2018-04-09 No release notes. ## Apps similar to LED Resistor Calculator Plus | App | Rating | Price | Category | | --- | --- | --- | --- | | [Flashlight 4 in 1](https://appshunter.io/ios/app/flashlight-4-in-1/id441212306) | 4.4 (417) | $3.99 | Utilities | | [MyLight – Flashlight & LED](https://appshunter.io/ios/app/mylight-flashlight-and-led/id405087923) | 4.6 (28,223) | Free | Utilities | | [Torchlight ◎ Brightest LED](https://appshunter.io/ios/app/torchlight-brightest-led/id390019536) | 4.6 (4,116) | Free | Utilities | | [FlashLight LED HD](https://appshunter.io/ios/app/flashlight-led-hd/id384134949) | 4.4 (732) | Free | Utilities | | [LED light controller LED lamp](https://appshunter.io/ios/app/led-light-controller-led-lamp/id1619787473) | 4.5 (11,908) | Free | Utilities | | [LED Banner Pro: Marquee maker](https://appshunter.io/ios/app/led-banner-pro-marquee-maker/id796885425) | 4.8 (6,061) | Free | Utilities | ## More apps by Nitrio - [Coloring Book - Plus](https://appshunter.io/ios/app/coloring-book-plus/id500418548) - [Resistor Plus](https://appshunter.io/ios/app/resistor-plus/id500615686) - [Premium Clock Plus](https://appshunter.io/ios/app/premium-clock-plus/id502784721) - [Gold Luxury Clock](https://appshunter.io/ios/app/gold-luxury-clock/id505043266) - [Ohm Law Calculator](https://appshunter.io/ios/app/ohm-law-calculator/id505900137) - [Premium Clock](https://appshunter.io/ios/app/premium-clock/id517487778) All apps by Nitrio: https://appshunter.io/developer/321121189 ## Related topics [resistor calculator lite](https://appshunter.io/ios/topics/resistor-calculator-lite) --- *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 2026-08-06.*