Convert Milligrams per litre to Micrograms per cubic metre
Convert Milligrams per litre (mg/L) to Micrograms per cubic metre (µg/m³) instantly and accurately.
Conversion Formula
µg/m³ = mg/L × 1000000
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.
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.
Quick Reference Table
| Milligrams per litre (mg/L) | Micrograms per cubic metre (µg/m³) |
|---|---|
| 1 mg/L | 1000000 µg/m³ |
| 2 mg/L | 2000000 µg/m³ |
| 5 mg/L | 5000000 µg/m³ |
| 10 mg/L | 10000000 µg/m³ |
| 25 mg/L | 25000000 µg/m³ |
| 50 mg/L | 50000000 µg/m³ |
| 100 mg/L | 100000000 µg/m³ |