Interior Paint VOC Emissions Calculator
Estimate how much volatile organic compound (VOC) mass is released from paint and how long to ventilate for a 90% reduction at a given air exchange rate.
Informational estimate; follow manufacturer safety data sheets and local ventilation codes for safe occupancy.
Examples
- 12 L paint at 45 g/L, room 90 m³, 2.5 ACH ⇒ 540.0 g VOC; 6000 mg/m³; 90% clear in 0.9 h
- 8 L paint at 30 g/L, room 70 m³, 1.2 ACH ⇒ 240.0 g VOC; 3429 mg/m³; 90% clear in 1.9 h
FAQ
What ACH value should I enter?
Use the estimated air changes from mechanical ventilation or open windows; residential spaces often range from 0.5 to 5 ACH.
Does this account for sorption into surfaces?
No. The calculation assumes all VOC mass remains in the air until removed by ventilation.
How should I interpret the concentration?
Compare the mg/m³ value with local indoor air quality guidelines to judge when the space is safe to occupy.
Additional Information
- Clearance time uses ln(10)/ACH, assuming well-mixed air and constant ventilation.
- Total VOC mass equals paint volume multiplied by manufacturer-listed grams per liter.
- Lower-VOC paints or higher ventilation rates significantly reduce indoor concentrations.