Moles to Grams Calculator
Moles to grams calculator
Convert chemical amount to grams, mg, and other mass units.
Quick amount
Mass required
58.440 g
58.440 g
Sodium chloride - NaCl
Molar mass
58.440 g/mol
Moles
1.0000 mol
Entities
6.0221e23
Equation
1.0000 mol x 58.440 g/mol = 58.440 g
Molar mass is calculated from conventional standard atomic weights.
Element composition and molar-mass provenance
Formula mode supports nested parentheses, brackets, and hydrates such as CuSO4.5H2O.
| Element | Count | Atomic weight | Contribution | Mass % |
|---|---|---|---|---|
| Cl | 1 | 35.45000 | 35.45000 g/mol | 60.661% |
| Na | 1 | 22.98977 | 22.98977 g/mol | 39.339% |
Values represent average molar mass for typical terrestrial isotopic composition.
Formula
m = n x M Symbol legend
| Symbol | Meaning | Unit | Copy |
|---|---|---|---|
m | Mass | g | |
n | Amount of substance | mol | |
M | Molar mass of the substance | g/mol |
- Convert the entered mol, mmol, umol, nmol, or pmol amount to moles.
- Calculate molar mass from the case-sensitive chemical formula or use a supplied custom value.
- Multiply moles by molar mass, then convert grams to the selected output mass unit.
Example
Worked example: 0.500 mol NaCl
- 1 NaCl molar mass = Na + Cl = 22.9898 + 35.45 = 58.4398 g/mol
- 2 m = n x M = 0.500 mol x 58.4398 g/mol
- 3 m = 29.2199 g before significant-figure rounding
0.500 mol NaCl corresponds to 29.2 g at three significant figures.
How
- Choose Chemical formula to select a known compound or type a formula, or choose Known molar mass for a custom value.
- Enter the chemical amount and select mol, mmol, umol, nmol, or pmol.
- Choose the output mass unit and significant figures.
- Read mass, normalized moles, molar mass, entity count, and the equation used.
Avoid
- Using the anhydrous formula when the reagent is a hydrate.
- Ignoring case sensitivity: Co is cobalt, while CO represents carbon and oxygen.
- Entering a stoichiometric coefficient before the formula instead of the compound formula itself.
- Treating average molar mass as exact for isotopically enriched or labeled material.
- Using theoretical mass without accounting for assay, purity, or handling losses.
Ref only. Verify values. Follow lab safety.
FAQ
Do I always need molar mass for this conversion?
Yes, but the calculator can derive it from a supported chemical formula or use a custom g/mol value.
Does the formula parser support parentheses and hydrates?
Yes. It supports nested parentheses or brackets and hydrate separators such as CuSO4.5H2O. Ionic charge and isotope notation are intentionally excluded.
Can I use the result as an exact laboratory weighing instruction?
Treat it as theoretical mass. Verify formula, hydration state, assay, purity, isotopic composition, and your laboratory procedure before weighing.
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