Convert Micrograms per cubic metre to Milligrams per litre
Convert Micrograms per cubic metre (µg/m³) to Milligrams per litre (mg/L) instantly and accurately.
Conversion Formula
mg/L = µg/m³ × 1.000000000e-6
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 litre
The milligram per litre (mg/L) equals 10⁻³ kg/m³ and is the dominant unit in water chemistry and environmental analysis. Numerically equivalent to ppm (mass) for dilute aqueous solutions; WHO drinking-water guideline for nitrate is 50 mg/L, for fluoride 1.5 mg/L. Biological oxygen demand (BOD), chemical oxygen demand (COD), and total suspended solids (TSS) are all reported in mg/L. 1 mg/L = 10⁻³ kg/m³ = 1 g/m³.
Quick Reference Table
| Micrograms per cubic metre (µg/m³) | Milligrams per litre (mg/L) |
|---|---|
| 1 µg/m³ | 1 × 10-6 mg/L |
| 2 µg/m³ | 2 × 10-6 mg/L |
| 5 µg/m³ | 5 × 10-6 mg/L |
| 10 µg/m³ | 1 × 10-5 mg/L |
| 25 µg/m³ | 2.5 × 10-5 mg/L |
| 50 µg/m³ | 5 × 10-5 mg/L |
| 100 µg/m³ | 1 × 10-4 mg/L |