Current limiting resistor calculator
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
