How to Calculate the Power Consumption for Indoor and Outdoor SMD LED Screens?

If you are a technician or sales of LED video screens, it is necessary to know how much is the total average power consumption for each square meter per day.

With our formula, you can easily figure out the electricity cost for one large-format LED screen or decide the size of A/C power cable to connect AC 220V/380V in a minute.

In this article, we will take P10 indoor / outdoor led video walls as an example. Okay, let’s dive in.

So what is the max power consumption? The following formula is the key to get the figures right.

Power consumption = Current (R*+G*+B*)/1000 x Voltage x (Pixel Density*/m2) / (Scanning mode*)

  • R* is short for the red chip from SMD LED
  • G* is short for the green chip from SMD LED
  • B* is short for the blue chip from SMD LED

In this case, the maximum power consumption of P10 indoor LED video display is:

P1 = (20+12+12)mA/1000*5V*10000/8 =275Watt/m2

And the maximum power consumption of P10 outdoor LED video display is:

P2 = (20+20+20)mA/1000*5V*10000/4 =750Watt/m2


1. SMD is short for Surface Mounting Device and LED is short for Light Emitting Diode.

2. The working voltage range for SMD LEDs is from 4.2V-5V. For energy saving led screens, it adopts 4.2V power supply while normally led screens are working with 5V power supply.

3. Scanning mode is the way that LEDs work with a printed circuit board. Scanning mode for the same model can be the same or different if from different led screen manufacturers.

4. The current for R/G/B chip is measured by milliampere.

5. Pixel density is the total quantity of LEDs used each square meter for a certain model.

(If you want to know how to calculate the pixel density of led display screens, please contact our expert for help.)

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LED Video Wall Buyers Guide

LED video walls are versatile enough to serve a variety of purposes, from conference room screens to outdoor event LED walls and everything
in between.