LED Resistor Calculator
Free LED Resistor Calculator — calculate and compare options instantly. No signup required.
V
V
mA
1
Nearest Standard Resistor
510Ω
Actual LED current: 19.6 mA
Resistance Needed
500Ω (exact: 500.0Ω)
Power Dissipated
196.1 mW
How to Use the LED Resistor Calculator
- 1. Enter your values — fill in the input fields with your numbers.
- 2. Adjust settings — use the sliders and selectors to customize your calculation.
- 3. View results instantly — calculations update in real-time as you change inputs.
- 4. Compare scenarios — adjust values to see how changes affect your results.
- 5. Share or print — copy the link, share results, or print for your records.
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