Most People Will Go Their Entire Lives Without Ever Knowing Why Airplane Windows Are Round

A natural question arises: why not simply use thicker metal or stronger materials around windows?

The answer is weight.

Every extra kilogram added to an aircraft increases fuel consumption. Over the lifetime of a plane, even small weight increases can cost airlines millions of dollars in fuel.

Designing smarter shapes is far more efficient than simply adding material.

Round windows allow engineers to achieve strength without unnecessary weight, making them the optimal solution.

Psychological Comfort Is a Bonus, Not the Goal
Interestingly, round windows also have psychological benefits.