Science
Moles to Mass Calculator
Use this chemistry calculator to move between grams and moles when you know molar mass.
Choose the missing quantity; the calculator hides that field and solves it from the others.
Solved value
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- Mass
- —
- Moles
- —
- Molar mass
- —
Student quick launch
Grade planning, algebra checks, and formulas students reach for most.
Study path
Use this calculator with
Follow these when you want the formula behind the answer, a short lesson, or nearby tools in the same topic.
What the moles to mass calculator solves
Use this chemistry calculator to move between grams and moles when you know molar mass.
Formula
How to use it
- Choose the quantity you want to solve for.
- Enter the known values with consistent units.
- Check the rearranged formula, substitution, and warnings before using the result.
How to read the answer
Molar mass is the bridge between particle amount in moles and measurable mass in grams.
Common mistakes and edge cases
- Use the compound's molar mass, not just one element unless appropriate.
- Keep grams and g/mol together.
- Round molar mass according to class instructions.
Worked examples
Solve the main formula
Solved value
Mass = 18.015 g
Reverse-solve a missing input
Solved value
Moles = 1 mol
Frequently asked questions
Can the moles to mass calculator solve for a missing variable?+
Yes. Use the solve-for control to hide the missing value, then enter the other known values with compatible units.
Why do the units matter?+
Formula calculators assume the entered values are already in matching units. Convert first when your measurements use mixed systems.
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Last updated: May 15, 2026