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Calcimator

Blue Light Exposure Calculator

Estimate your daily blue light exposure score based on screen time, brightness, device count, and blue light filter usage.

Inputs

hours
%
%

Results

Daily Exposure Score (0-100)

46

Recommended Daily Breaks

24 breaks

Weekly Screen Hours56 hours
Filter Effectiveness0%
How to Use This Calculator
  1. Enter your total daily Screen Hours Per Day across all devices (computer, phone, tablet, TV).
  2. Set your Average Screen Brightness as a percentage (0–100%). Lower brightness reduces exposure.
  3. Enter the Number of Devices you use regularly throughout the day.
  4. Set your Blue Light Filter Level if you use blue-light glasses, night mode, or software filters (0% = no filter).
  5. Review your Daily Exposure Score (0–100) and Recommended Daily Breaks based on the 20-20-20 rule.

How the result changes with Screen Hours Per Day

Screen Hours Per DayDaily Exposure Score (0-100)Recommended Daily Breaks
2.4148 breaks
8.44826 breaks
169148 breaks
2210066 breaks

What each input means

Screen Hours Per Day
Total hours spent looking at screens (computer, phone, tablet, TV) per day.
Average Screen Brightness
Average brightness setting of your screens (0-100%).
Number of Devices
Number of different screen devices you use regularly.
Blue Light Filter Level
Percentage of blue light filtered (blue light glasses, night mode, software filter). 0 = no filter.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Screen Hours Per Day = 8, Average Screen Brightness = 70, Number of Devices = 2, Blue Light Filter Level = 0 = 4 input(s) provided
  2. Calculate Daily Exposure Score
    Daily Exposure Score
    46 = 46
  3. Calculate Recommended Daily Breaks
    Recommended Daily Breaks
    24 = 24
  4. Calculate Weekly Screen Hours
    Weekly Screen Hours
    56 = 56
  5. Calculate Filter Effectiveness
    Filter Effectiveness
    0 = 0%

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