Molecular Weight Calculator (Molar Mass)

Molecular weight, also known as molar mass, is the sum of the atomic weights of all atoms in a chemical formula. Using our Molecular Weight Calculator, simply enter the chemical formula of the compound (e.g., H₂O for water), and it will automatically compute the value in grams per mole (g/mol) based on the periodic table. This tool handles common organic compounds and ensures accuracy by using unified atomic mass units.

Molecular weight refers to the mass of one molecule in atomic mass units (amu or Da), while molar mass is the weight of one mole of a substance in grams. Our Molecular Weight Calculator integrates with a molarity calculator feature, allowing you to input the molecular formula to find the molar mass, then use it to calculate concentration. For example, for NaCl, the molar mass is 58.44 g/mol, which is key for preparing solutions in chemistry.

The average molecular weight of a mixture is calculated by weighting the molecular weights of components by their mole fractions. In our Molecular Weight Calculator, enter the chemical formulas and proportions (e.g., for air: N₂ at 78%, O₂ at 21%), and it computes the value. This is useful in biochemistry or gas mixtures, where Avogadro's number helps relate to the mass of 1 mole.

For proteins, molecular weight is the sum of the atomic masses of amino acids minus water lost in peptide bonds. Use our Protein Molecular Weight tool by inputting the amino acid sequence (e.g., one-letter codes like ALA for alanine), and it calculates the exact value in Daltons (Da). This feature is ideal for peptide or protein analysis, incorporating atomic weights from the periodic table.

The molecular weight of DNA or RNA is based on the sum of nucleotide masses (e.g., A=313.2 Da, T=304.2 Da for DNA). Our Molecular Weight Calculator supports RNA and DNA sequences—enter the base sequence, and it computes the total using atomic mass units. This helps in molecular biology, where one mole of the substance equals its molar mass in grams.

Molarity is moles per liter, derived from mass divided by molar mass. With our Molarity Calculator integrated into the Molecular Weight Calculator, input the chemical compound's formula to get the molar weight, then add mass and volume for dilution calculations. For instance, for glucose (C₆H₁₂O₆, molar mass 180.16 g/mol), it's essential for solution preparation in labs.

Yes, for gases, molecular weight is the sum of atomic masses (e.g., CO₂: C=12, O=16×2 = 44 Da). Enter the molecular formula in our tool, and it provides the molar mass, which is crucial for ideal gas law applications. This includes common gases like air or natural gas mixtures, using the mass of one atom scaled to moles.

Peptides' molecular weight is calculated from the amino acid chain, accountin g for bond formations. Input the peptide sequence into our specialized Peptide Molecular Weight section, and it sums the atomic weights while subtracting for water. This is a key parameter in biochemistry, where the tool uses standard values like the mass of a single amino acid residue.

Formula weight is similar to molecular weight for ionic compounds, summing atomic masses. Our Molecular Weight Calculator uses the periodic table to fetch atomic mass values (e.g., Na=23, Cl=35.5 for NaCl). Enter the chemical formula, and it computes it instantly—perfect for determining the gram molecular weight or unified atomic mass for any substance.

For water (H₂O), it's 2×1 (H) + 16 (O) = 18 g/mol. Our Molecular Weight Calculator simplifies this: type the formula, and it outputs the result using atomic weights. This extends to any molecule, where molecular weight is an important parameter for chemistry, representing the mass of one mole of atoms in Daltons or amu.