VOC Compliance Calculator

This calculator compares a coating product's VOC content against a regulatory limit you enter, then converts the volume of product you plan to use into a total mass of VOCs emitted so you can check it against the emission ceiling that limit implies. Compliant is a straightforward comparison of Product VOC Content against Regulatory Limit in grams per liter, independent of how much product you use, because VOC rules regulate concentration rather than total quantity. That concentration is a regulatory figure: 40 CFR 59.406(a) and SCAQMD Rule 1113 both define VOC content as grams of VOC per litre of coating less water and less exempt compounds, so it is not the grams of VOC in a litre of can. Total VOC Emitted therefore applies that concentration only to the non-water, non-exempt share of the volume you enter -- set Water + Exempt Compounds to 0 for a solvent-borne product, or to the water fraction from the SDS for a waterborne one, or the mass figures will be overstated by roughly one over that fraction. The Regulatory Limit is yours to supply, because there is no single national number: the federal AIM rule (40 CFR part 59, subpart D) allows 250 g/L for flat and 380 g/L for non-flat architectural coatings, while SCAQMD Rule 1113 has capped both flat and non-flat coatings at 50 g/L since 1 January 2014 and industrial maintenance coatings at 100 g/L.

OTC model-rule states sit between the two. Look the limit up for your air district and your specific coating category before trusting the Compliant verdict -- the same 200 g/L product passes federally and fails by fourfold in the South Coast basin. Max Volume at This VOC answers the practical inverse of Compliant: given the VOC content your product actually carries, how many gallons can be applied before the emission ceiling implied by the Regulatory Limit at your entered volume is reached. For a compliant product it exceeds the volume you entered; for a non-compliant one it is smaller, and the shortfall is how much you would have to cut back to hit the same emission budget. Application Rate has no part in any of this math: Compliant, VOC Exceedance, Total VOC Emitted, Permitted Emission, and Max Volume at This VOC are all driven by Product VOC Content, Regulatory Limit, Volume Used, and Water + Exempt Compounds alone, so it exists purely as a job-planning reference figure alongside the compliance numbers.