Convert Micrograms per cubic metre to Milligrams per cubic metre
Convert Micrograms per cubic metre (µg/m³) to Milligrams per cubic metre (mg/m³) instantly and accurately.
Conversion Formula
mg/m³ = µg/m³ × 0.001
About Micrograms per cubic metre
The microgram per cubic metre (µg/m³) equals 10⁻⁹ kg/m³, the standard unit for ambient air quality reporting. WHO 2021 guidelines set annual mean limits for PM2.5 at 5 µg/m³ and PM10 at 15 µg/m³; NIOSH REL for nuisance dust is 10 000 µg/m³. Urban background air typically contains 10-50 µg/m³ of total suspended particles. 1 µg/m³ = 10⁻⁹ kg/m³ = 10⁻⁶ g/m³.
About Milligrams per cubic metre
The milligram per cubic metre (mg/m³) equals 10⁻⁶ kg/m³, the reference unit for industrial occupational exposure limits (OELs). NIOSH REL for respirable crystalline silica is 0.05 mg/m³; OSHA PEL for Portland cement 15 mg/m³; ACGIH TLV for calcium carbonate dust 10 mg/m³. Numerically equal to µg/L, bridging airborne and aqueous analysis. 1 mg/m³ = 10⁻⁶ kg/m³ = 1 µg/L.
Quick Reference Table
| Micrograms per cubic metre (µg/m³) | Milligrams per cubic metre (mg/m³) |
|---|---|
| 1 µg/m³ | 0.001 mg/m³ |
| 2 µg/m³ | 0.002 mg/m³ |
| 5 µg/m³ | 0.005 mg/m³ |
| 10 µg/m³ | 0.01 mg/m³ |
| 25 µg/m³ | 0.025 mg/m³ |
| 50 µg/m³ | 0.05 mg/m³ |
| 100 µg/m³ | 0.1 mg/m³ |