Use Fitts’s Law to Design Faster Interactions
Psychology & UX Laws · ux laws
Updated 2026-07-28
- Understand the principle behind Fitts’s Law: the time required to reach a target depends on two factors:
- The distance to the target.
- The size of the target.
- Make important actions easier to reach. Reduce effort by:
- Increasing the size of frequently used buttons.
- Placing actions closer to where users are already interacting.
- Avoiding unnecessary movement between the user’s current position and the next action.
- Design for real-world input behavior. On mobile, users often interact with one thumb, so important controls should be placed within comfortable reach instead of forcing users to stretch across the screen.
- Prioritize actions based on accessibility and frequency. The most important button should not only be visually prominent—it should also be physically easy to reach.
- Reduce interaction distance whenever possible. Patterns like these work because the target appears close to the user’s current focus:
- Right-click context menus near the cursor.
- Floating action buttons near the active area.
- Inline editing where the user is already looking.
- Make targets easier to hit:
- Increase tap areas beyond the visible icon.
- Avoid placing critical actions near competing controls.
- Give users enough space to interact confidently.
- Great interfaces remove unnecessary effort. The best target is often the one that requires the least movement, attention, and precision.
Related guides
UX Handbook