How to use this calculator
- Choose a chemical formula or a known molar mass.
- Enter the amount and select the amount unit.
- Select the output mass unit and calculate.
Formula and variables
m = nM
| Symbol | Meaning | Unit |
|---|---|---|
| m | mass | g |
| n | amount | mol |
| M | molar mass | g/mol |
Worked example
2.00 mol H2O has a mass near 36.03 g.
Interpretation
Sample mass is amount multiplied by the molar mass for the entered formula.
Common mistakes
- Do not omit the formula.
- Keep amount and output mass units explicit.
Frequently asked questions
How do I convert moles to grams?
Multiply the amount in moles by the molar mass in grams per mole.
Can the calculator return kilograms or micrograms?
Yes. Select the required mass unit before you calculate.
Does capitalization matter in a chemical formula?
Yes. Element symbols are case-sensitive. CO is carbon monoxide. Co is cobalt.
Can I use scientific notation?
Yes. Enter values such as 6.022e23 or 1.0e-6 in a numeric field.
How should I round the result?
Keep extra digits during the calculation. Round the final result to the precision required by your data.