PSA Calculator is a free tool designed to help gamers find their perfect mouse sensitivity through a proven method known as "Perfect Sensitivity Approximation" (PSA).
Whether you're a competitive FPS player or someone just trying to get more consistent aim, this tool walks you through a simple 7-step process to fine-tune your in-game sensitivity. No downloads, no accounts — just straight-to-the-point sensitivity tuning.
You start by inputting your current base sensitivity. The calculator then guides you through a sequence of slightly higher and lower values. You make selections based on what feels better, and after 7 iterations, the calculator outputs your "perfect" sensitivity.
The idea is to reduce guesswork and find the sweet spot that matches your aim style and muscle memory.
This tool was built by a fellow gamer who got tired of messing with mouse settings every few months. It’s free to use and always will be. If it helps you land more headshots, it’s already done its job.