This blue light calculator estimates how much blue light exposure your eyes receive from screens by accounting for factors such as viewing duration, screen size, resolution, and working distance. Rather than focusing on marketing claims, it places exposure into context by showing how these variables interact to influence total retinal light load. The goal is to make screen-related blue light exposure more understandable and proportional to real-world use. For more background information, please click the adjacent blog post.

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Is the Screen You Are Reading This on Frying Your Eyes with Blue Light?
Is the Screen You Are Reading This on Frying Your Eyes with Blue Light?

We spend hours glued to screens every day, and it feels like all that blue light must be harmful. But how much actually reaches your retina? And how does a full workday at a monitor stack up to blue exposure from the outdoors?

Quick presets

Presets set typical brightness and distance. You can still tweak anything after.

Your setup

Used for total dose via visual angle. 16:9 assumed.
Affects total integrated dose only.
Child Adult Senior
Small Medium Large
Most white‑LED screens are ~20% blue (400–500 nm). Increase for very cool color temps or bright white content; decrease for warm/night‑shift modes.

Per-area of retina results (compared to 20 minutes outdoors)

Per-area of retina blue light dose0
Outdoor
0
Your screen
0%

Total cumulative dose

Total cumulative screen dose0
Compared to 20 minutes outdoors, your total cumulative screen dose is 0%.