Mole and Avogadro's Number

Calculate the number of molecules or moles using Avogadro's number. The mole is the SI base unit for amount of substance, with Avogadro's constant (NA) = 6.022141×10^23 molecules/mol.

Parameter	Value	Unit
Avogadro's Number (NA)	6.022141×10^23	molecules/mol
Standard Molar Volume (STP)	22.414	liters/mol
Temperature (STP)	0	°C
Pressure (STP)	1	atm

Calculator

Inputs

Mass of Substance (kg)

Molecular Weight (kg/kmol)

Results

Number of Moles-- mol

Number of Molecules-- molecules

Information

Avogadro's Constant (NA): 6.022141×10^23 molecules/mol

Standard Molar Volume: 22.414 liters/mol at STP (1 atm, 0°C)

Formula for Number of Molecules:

n = (mass / molecular_weight) × NA × 1000

Where:

mass is in kg
molecular_weight is in kg/kmol
NA is Avogadro's number

Mole and Avogadro's Number | MEPKit Engineering Tools | MEPKit