Calculate how much genuine focus time a day contains after interruptions.
Interruptions cost far more than their own duration because of the recovery time that follows. Twelve interruptions at fifteen minutes of recovery each consume three hours regardless of how brief the interruptions themselves were. Fragmentation matters as much as total time: four separate hours are worth much less than one uninterrupted four-hour block for demanding work.
Focus Time
Focus hours = workday − meeting hours − interruptions × recovery time
Focus hours = workday − meeting hours − interruptions × recovery time Interruptions cost far more than their own duration because of the recovery time that follows. Twelve interruptions at fifteen minutes of recovery each consume three hours regardless of how brief the interruptions themselves were.
Fragmentation matters as much as total time: four separate hours are worth much less than one uninterrupted four-hour block for demanding work.
This calculator takes 5 inputs: Workday length, Hours in meetings, Interruptions per day, Recovery time per interruption, Minimum useful focus block. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.