Current limiting resistor calculator for Led's
Java Script provided by Metku Mods
single led - series led's - parallel led's
Single led
Supply Voltage
VOLTS
Voltage Drop Across LED
VOLTS
Desired LED Current
MILLIAMPS
Calculated Limiting Resistor
OHMS
Nearest higher rated 10% resistor
Calculated Resistor Wattage
WATTS
Safe pick is a resistor with
power rating of
WATTS
Leds in series
Supply Voltage
VOLTS
Voltage Drop Across LED
VOLTS
Desired LED Current
MILLIAMPS
How many leds connected
Calculated Limiting Resistor
OHMS
Nearest higher rated 10% resistor
Calculated Resistor Wattage
WATTS
Safe pick is a resistor with
power rating of
WATTS
Leds in parallel
Supply Voltage
VOLTS
Voltage Drop Across LED
VOLTS
Desired LED Current
MILLIAMPS
How many leds connected
Calculated Limiting Resistor
OHMS
Nearest higher rated 10% resistor
Calculated Resistor Wattage
WATTS
Safe pick is a resistor with
power rating of
WATTS
This will calculate LED resistance need for current needs.
