Fast & Accurate Chemistry Tool
आणविक भार कैलकुलेटर Molar Mass Calculator
Enter any chemical formula to calculate its molecular weight, molar mass, elemental composition percentages, and atom counts with 4-decimal precision.
118 Elements
IUPAC Atomic Weights
4 Decimals
Precision Accuracy
100% Client-Side
Instant & Secure
Molecular Weight
All 118 elements · IUPAC 2021 atomic weights
Quick examples:
Enter a chemical formula above to calculate molecular weight
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Formula Input
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Hydrogen (H)2.016 g/mol11.2%
Oxygen (O)15.999 g/mol88.8%
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Ca(OH)₂
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Ca × 1O × 2H × 2
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FAQ
Frequently Asked Questions
Find answers to common questions about molecular weight calculations and chemistry formulas.
Molecular weight is the sum of the atomic weights of all atoms in a chemical formula, expressed in g/mol or Daltons (Da).
Multiply each element's atomic weight by its atom count in the formula and sum the total.
Molecular weight measures a single molecule in Daltons while molar mass measures one mole in g/mol; both share equal numerical values.
Molecular weight is measured in grams per mole (g/mol), Daltons (Da), or atomic mass units (amu).
This calculator uses standard IUPAC 2021 atomic weights precise to 4 decimal places.
Calculations are accurate to 4 decimal places following official IUPAC 2021 standards.
Yes, this calculator is 100% free to use with no sign-up or usage limits.