# Convert mg/m3 to PPM Conversion

## Convert mg/m3 to PPM Parts Per Million

**Enter a Mg/M3 Number**

**Molecular Weight (ex: So2 Molecular weight is 64.1)**

Your NTP Result (mg/m3) Will Be Shown Here

Your NTP Result (ug/m3) Will Be Shown Here

Your STP Result (mg/m3) Will Be Shown Here

Your STP Result (ug/m3) Will Be Shown Here

## Information about Mg/M3 to PPM

STP (Standard Temperature and Pressure): defined at air 1 atm or 1 atmosphere at 0^{0}C - 273.15 K, 32^{0}F. - In STP (1 Mole) of a Gas is equal to 22.45 Litres

NTP (Normal Temperature and Pressure): defined at air 1 atm or 1 atmosphere at 20^{0}C - 293.15 K, 68^{0}F. - In NTP (1 Mole) of a Gas is equal to 24.45 Litres

Mg/M3 to PPM (Parts Per Million).

ppm in NTP = (MgM3 * 24.45) / Molecular Weight

exp: (42.3 * 24.45) / 33.9 = 30.50 PPM milligram

ppm in STP = (MgM3 * 24.45) / Molecular Weight

exp: (42.3 * 22.45) / 33.9 = 28.01 PPM milligram