Blue Light Calculator

❓ What is a Blue Light Calculator?

A blue light calculator determines when you need to stop using electronic screens and start dimming lights to protect your natural melatonin production. It calculates specific times based on your desired bedtime—typically 2 hours before bed for screens and 3 hours for bright overhead lights.

Blue light (460-480nm wavelength) from phones, laptops, and tablets tricks your brain into thinking it's daytime, suppressing melatonin production by up to 50%. Since melatonin starts building 2-3 hours before sleep, screen exposure during this critical window can delay sleep onset by 1-2 hours. Following the calculator's timeline helps you fall asleep faster and achieve deeper sleep naturally.