Molecular Weight Calculator
Calculate exact molar mass and elemental mass percentage breakdown from chemical formulas (e.g., H2O, C6H12O6, H2SO4).
Molecular Weight Calculator
Compute the exact molecular weight (molar mass in g/mol) and percentage elemental composition for any chemical formula or compound.
180.156 g/mol
Formula: C6H12O6 | Elements: 3| Element | Symbol | Atoms | Mass Contribution | Mass Percentage |
|---|---|---|---|---|
| Carbon | C | 6 | 72.066 g/mol | 40% |
| Hydrogen | H | 12 | 12.096 g/mol | 6.71% |
| Oxygen | O | 6 | 95.994 g/mol | 53.28% |
Understanding Molecular Weight Calculator & Formula
The Molecular Weight Calculator on CalculatorScale.com is engineered to deliver instant, mathematically verified calculations conforming strictly to standard institutional equations. Whether planning long-term investments, managing household budgets, tracking clinical fitness targets, analyzing academic genetics, calculating veterinary dosages, or converting dimensional units, every calculation updates dynamically in real time without lag.
Every formula used in this tool adheres to certified international standards, including World Health Organization biometric metrics, veterinary clinical guidelines, NIST physical conversion constants, and standard biological equations. Results are computed entirely client-side inside your browser with complete data privacy, ensuring your sensitive numbers and statistics never leave your device.
Our calculators are 100% free with no registration, subscriptions, or paywalls required. You can toggle between imperial and metric units, customize input parameters, export calculation summaries, or embed this calculator directly into your own website or blog.
How to Use the Molecular Weight Calculator
- 1 Enter any chemical formula (e.g. C6H12O6, H2SO4, NaCl, C12H22O11).
- 2 Click the green "Calculate Mass ▶️" button to see total molar mass (g/mol) and element mass percentages.
Molecular Weight Calculator — Frequently Asked Questions
Q1 How is molecular weight (molar mass) calculated from a chemical formula? ▾
Multiply the atomic weight of each element by its subscript count in the chemical formula, then sum all element masses together using standard IUPAC periodic table atomic weights.
Q2 What units are used for molecular weight? ▾
Molecular weight is expressed in grams per mole (g/mol) or unified atomic mass units (u / Daltons, Da).
Q3 How do parentheses and crystal hydrates work in chemical formulas? ▾
Subscripts outside parentheses multiply all elements inside (e.g. Ca(NO3)2 has 1 Ca, 2 N, 6 O). Hydrates (e.g. CuSO4·5H2O) add the mass of the crystal water molecules to the anhydrous salt mass.
Q4 What is the difference between molecular weight and empirical formula weight? ▾
Empirical formula weight represents the simplest integer ratio of elements in a compound, while molecular weight represents the actual number of atoms in a single molecule (e.g. Glucose C6H12O6 has molecular mass ~180.16 g/mol, empirical CH2O mass ~30.03 g/mol).
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