Enter the amount of substance (moles) and the molar mass (g/mole) into the Mass From Moles Calculator. The calculator will evaluate and display the Mass From Moles. 

Moles to Mass Calculator

Pick a substance and enter an amount.

Moles → Mass
Mass → Moles
Molar mass: 18.015 g/mol

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Mass From Moles Formula

The following formula is used to calculate the Mass From Moles. 

m = n * MM
  • Where m is the Mass From Moles (g)
  • n is the amount of substance (moles) 
  • MM is the molar mass (g/mole) 

To calculate the mass from moles, multiply the number of moles by the molar mass.

Moles to Mass Conversion Table (Assumes Water, M = 18.015 g/mol)
Moles (mol) Mass (g) Mass (kg) Mass (lb)
0.0000010.0000180150.0000000180150.0000000397162
0.000010.000180150.000000180150.000000397162
0.00010.00180150.00000180150.00000397162
0.0010.0180150.0000180150.0000397162
0.0020.036030.000036030.0000794325
0.0050.0900750.0000900750.000198581
0.010.180150.000180150.000397162
0.0250.4503750.0004503750.000992906
0.050.900750.000900750.00198581
0.11.80150.00180150.00397162
0.23.6030.0036030.00794325
0.254.503750.004503750.00992906
0.59.00750.00900750.0198581
0.7513.511250.013511250.0297872
118.0150.0180150.0397162
236.030.036030.0794325
590.0750.0900750.198581
10180.150.180150.397162
20360.30.36030.794325
50900.750.900751.98581
Assumes water (M = 18.015 g/mol). 1 g = 0.001 kg; 1 lb = 453.592 g (≈ 0.00220462 lb per g). Therefore, 1 mol H₂O ≈ 18.015 g ≈ 0.018015 kg ≈ 0.0397162 lb.

How to Calculate Mass From Moles?

The following example problems outline how to calculate Mass From Moles.

Example Problem #1:

  1. First, determine the amount of substance (moles).
    • The amount of substance (moles) is given as: 1.60.
  2. Next, determine the mass molarity (g/mole).
    • The mass molarity (g/mole) is provided as: 275.
  3. Finally, calculate the Mass From Moles using the equation above: 

m = n * MM

The values given above are inserted into the equation below and the solution is calculated:

m = 1.60 * 275 = 440 (g)


Example Problem #2: 

For this problem, the variables needed are provided below:

amount of substance (moles) = 5

mass molarity (g/mole) = 125

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer. 

m = n * MM = ?