UX law
Fitts's Law in UX and UI design
Learn how target size and distance affect how quickly and reliably users can interact with controls.
In one sentence
Larger, easier-to-reach targets require less precision.
Why it matters
Tiny or distant controls increase interaction time and make accidental misses more likely.
Applied example
Increasing a mobile icon's tappable area can improve usability even if the visible icon itself stays the same size.
What to remember
- Make important targets comfortably large.
- Increase hit areas around small icons.
- Consider reach, not only visual size.
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