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
Features
Why Choose Our Calculator
118 Elements Supported
Comprehensive periodic table database with official IUPAC 2021 standard atomic weights.
Nested Groups & Brackets
Recursive descent parser handles complex parentheses, square brackets [], and curly braces {}.
Elemental Composition %
Instant mass percentage calculations for elemental analysis and stoichiometry problems.
Export & Print Reports
Copy results directly to clipboard or print formatted molecular mass breakdown PDF reports.
Step-by-Step Guide
How to Calculate Molecular Weight
Calculate chemical formula mass in three simple steps.
Enter Your Chemical Formula
Type any formula using standard chemical notation — e.g. H2O, Ca(OH)2, or K4[Fe(CN)6].
Ca(OH)₂
↓
Ca × 1O × 2H × 2
Database
Popular Chemical Compounds
Quickly view molecular weights for frequently calculated substances.
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.