Led Car
LED resistor calculator
0 ratings
Free
About
Led Car computes the series resistor you need when replacing a car LED with one of a different wattage, based on your supply voltage.
Just enter your voltage, the original LED power and the new LED power: Led Car gives you the resistor value (Ohm) and the recommended wattage. If no resistor is needed, it tells you so.
- Fast, offline, no account required
- Clean native SwiftUI interface
- Full VoiceOver and Dynamic Type support
- Light and dark mode
- Optional tip jar to support development (unlocks nothing)
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What's New in Led Car
2.0
July 28, 2026
Led Car is back — completely rebuilt from scratch after all these years! 100% native SwiftUI, iOS 18, full VoiceOver support, and a fresh look in light & dark mode. Same simple math you know, brand new engine under the hood.
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