Service Hours: Monday to Friday,Saturday: Guangfu Road branch only, Closed on Sundays and public holidays. For specific hours, please see details for each branch.

All marked prices are tax-inclusive and in TWD. Free shipping for purchases over 1200 (mainland Taiwan).

Language: English Centenary Materials Co., Ltd.

Centenary Materials Co., Ltd.

繁體中文 English

Service Hours: Monday to Friday,Saturday: Guangfu Road branch only, Closed on Sundays and public holidays. For specific hours, please see details for each branch.

All marked prices are tax-inclusive and in TWD. Free shipping for purchases over 1200 (mainland Taiwan).

Service Hours: Monday to Friday,Saturday: Guangfu Road branch only, Closed on Sundays and public holidays. For specific hours, please see details for each branch.

All marked prices are tax-inclusive and in TWD. Free shipping for purchases over 1200 (mainland Taiwan).

Language:

繁體中文 English

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You are here: Conversion Calculator > LED Resistor Calculator

LED Resistor Calculator

Calculate the required current-limiting resistor value and power rating for LED circuits

Supply Voltage (Vs)

V

LED Forward Voltage (Vf)

V

LED Forward Current (If)

mA

Number of LEDs

Series

Result

Formula

R = (Vs − n×Vf) / If

P = (Vs − n×Vf) × If