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Easily calculate molecular weight online with our free Molecular Weight Calculator. Fast, accurate, and perfect for students, chemists, and researchers.
Understanding the molecular weight of a compound is essential in chemistry, biology, and many scientific fields. Whether you are a student, researcher, or chemist, our Molecular Weight Calculator is designed to help you quickly calculate the molecular weight of any compound or element with ease.
This online tool allows you to calculate molecular weight from chemical structure, formula, or even from proteins, peptides, amino acids, and DNA sequences. With its accurate and user-friendly interface, this molecular weight finder simplifies complex calculations and provides instant results.
Molecular weight, also known as molar mass, refers to the mass of a molecule. It is typically measured in grams per mole (g/mol) and is calculated by adding up the atomic masses of all atoms present in the molecule.
For example, the molecular weight of water (H₂O) is calculated as:
(2 × 1.008) + (1 × 15.999) = 18.015 g/mol
This calculation is done by multiplying the atomic mass of each element by the number of times it appears in the formula and then adding them together.
Using our Molecular Weight Calculator is simple and fast. Just follow these steps:
Step 1:
Enter the chemical formula of the compound. For example, H2O, NaCl, C6H12O6, etc.
Step 2:
Click the "Calculate" button.
Step 3:
The tool will display the molecular weight in grams per mole (g/mol).
Our calculator also supports calculation for proteins, peptides, amino acids, and DNA/RNA sequences. For proteins, simply enter the amino acid sequence using standard single-letter codes.
Our calculator is built to be fast, accurate, and user-friendly. It eliminates the need for manual calculation and provides precise results instantly. Whether you're working with organic compounds, biochemical sequences, or general chemistry problems, this tool is your perfect assistant.
It also supports calculation based on:
The general formula to calculate molecular weight is:
Molecular Weight = Σ (Atomic Mass × Number of Atoms of Each Element)
Where:
Example:
For Glucose (C₆H₁₂O₆):
= (6 × 12.011) + (12 × 1.008) + (6 × 15.999)
= 180.156 g/mol
Molecular weight is generally expressed in the unit grams per mole (g/mol). It tells you how many grams of the compound are present in one mole of that substance. This unit is universal in chemical and biochemical studies.
The Molecular Weight Calculator is an essential tool for scientists, students, and educators who need quick and accurate molecular weight data. Whether you're dealing with chemical compounds, peptides, or DNA strands, this tool can save you valuable time and effort.
It helps in finding:
Try our free molecular calculator now and simplify your chemical calculations today!
Molecular weight is the sum of the atomic weights of all atoms in a molecule, measured in grams per mole (g/mol).
Yes, just enter the amino acid sequence using single-letter codes to get the molecular weight.
Absolutely! Our calculator supports nucleotide sequences and can compute their molar mass easily.
They are often used interchangeably. Technically, molar mass is the mass of one mole of a substance, while molecular weight is the relative mass of one molecule.
You can calculate molarity separately using a molarity calculator, but knowing the molecular weight is essential for those calculations.