How many hours are you losing to CO₂?

Elevated CO₂ impairs cognitive function before you feel anything wrong. This calculator estimates your annual impact based on your workspace conditions.

Room dimensions

Approximate size of your primary workspace

How many people typically occupy this space?

Ventilation type

Windows open or excellent mechanical ventilation Central HVAC, windows usually closed Small room, limited ventilation, no windows

Hours worked per day in this space

Work days per year

Hours of Peak Cognition Lost Per Year

Estimated average CO₂ level -- ppm

Cognitive impairment --%

Effective hours per day -- hrs

Lost hours per day -- hrs

Based on your inputs, you're likely working in conditions that reduce your cognitive capacity. This is the equivalent of losing X full work weeks per year.

The fix is simple

Opening a window and adding a CO₂ monitor would likely recover most of these hours. An Aranet4 ($250) pays for itself in recovered productivity within weeks.

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Methodology: This calculator uses CO₂ generation rates from ASHRAE standards (~0.3 L/min per person at rest) and cognitive impact curves from the Harvard CogFx study (Allen et al., 2016). Actual CO₂ levels vary based on metabolic rate, exact ventilation rates, and room sealing. For precise measurement, use a NDIR CO₂ monitor like the Aranet4. See full research database →