LED Series Resistor Calculator

This calculator gives the values for current limiting resistors for LEDs.

Supply Voltage (V in)
volts

LED Forward Voltage
volts

LED Forward Current
milliamps

R1 =

Fast and free delivery

Free delivery for all orders over £35 (excluding VAT),
See all Shipping and Delivery options.

Secure online payment

We possess SSL / Secure Certificate,
Read more about our security.

Help and Support

Browse our Knowledge Base for support solutions, tutorials and troubleshooting guides.