Context switching occurs when you jump from one task, project, or app to another. Because the human brain isn't designed for parallel processing, every jump requires mental "re-loading" time. This cognitive transition drastically reduces your focus, increases errors, and burns productive hours.

This calculator uses the widely accepted framework developed by software engineering pioneer Gerald Weinberg. Working on 1 project results in 0% loss. Adding a second simultaneous project burns 20% of a person's time just managing the switch. A third project burns 40%, and so on (capped at an 80% total loss).