Skip to content

ppm to mg/m³ Conversion Calculator

ppm to mg/m³ Conversion Calculator

Convert gas or vapor concentrations from parts per million (ppm) to milligrams per cubic meter (mg/m³) at 25°C and 1 atm.

Formula: mg/m³ = (ppm × Molecular Weight) ÷ 24.45
ppm
Enter the gas or vapor concentration in parts per million.
g/mol
Enter the molecular weight of the contaminant.
Conversion result —
Enter the concentration and molecular weight, then select Calculate.
Important: This conversion assumes 25°C and 1 atmosphere. Results will differ at other temperatures or pressures. Use the conditions specified by the applicable sampling method, regulation, or exposure limit.
Tags: